◆EMYSTI Research
Vol. 01 · 2026.05
EMYSTI Research Report — Vol. 01

When "translation" is enough,
and when "translation" is not enough.

What happens when foreign residents use a generic translation service to talk with hospitals, immigration offices, and landlords? We empirically compared TransHero (Hon-yaku-Taisho) against a generic translation service across 6 everyday scenes and 13 cases.

Publisher
EMYSTI LLC
Published
May 2026
Test Cases
13 cases
Scenes Covered
6 everyday scenes
01 Why this matters

Why "translation accuracy" alone is not enough

For foreigners living in Japan, the real difficulty is not "the language barrier" itself. It is the moment when the words are translated, yet the meaning fails to land.

  • "My Number Card" gets rendered as "number card" and the city hall counter cannot understand
  • "I would like to be examined without a reservation" is rendered as "add to the reservation list," confusing the reception desk
  • A point made to a superior, translated literally, damages the working relationship
  • A description of symptoms told to a doctor is mistranslated, becoming the entrance to misdiagnosis

These are not problems of "translation accuracy."

It is a problem of translation that fails to land in the context of Japanese society.
Converting "word to word" and converting "from the situation a foreign resident is in, into something a Japanese person can receive naturally" are two different technologies.

EMYSTI LLC's TransHero (Hon-yaku-Taisho) is designed to focus on exactly this point. Through a 13-case empirical comparison with a generic translation service, this report shows how a "translation app" differs from "infrastructure for living in Japan."

02 Executive Summary

Three Structural Differences

The differences between Generic Translation Service A and TransHero revealed in this study are not surface-level word choices, but stem from a fundamental divergence in product architecture.

01

Mixed-Language Speech Recognition

Mixed-Language ASR

Foreign residents speak by mixing Japanese terms like "My Number," "zairyu (residence)," and "shiyakusho (city hall)" directly into Chinese. The ASR of Generic Service A lacks training data for this code-switching pattern; we observed multiple cases of "My Number" being recognized as "number" and "zairyu" as "zai-ryu (re-stay)."

02

Scene-Appropriate Vocabulary and Tone

Scene-Aware Localization

Hospitals, immigration offices, schools, housing, and business each have their own conventionalized formal expressions. Whether "jiahao (add a slot)" is translated as "consultation without reservation," and whether "zairyu koshin" is rendered as "Application for Extension of Period of Stay," is the boundary line between generic and domain-aware translation.

03

Relationship-Aware Politeness Tiers

Relationship-Aware Politeness

The same content requires different keigo (honorific) tiers depending on whether the listener is a superior, subordinate, peer, public institution, or service provider. Literal translation's inability to handle this tiered system causes direct harm in business and interpersonal relationships.

03 Field Tests

Empirical Comparison Across 6 Everyday Scenes

Administration, healthcare, education, housing, business, and interpersonal relations — across the six main scenes that make up the life of a foreign resident, we input the same Chinese-language source utterance into both services and compared the outputs.

About This Validation — Methodology
Validation Date
May 10, 2026
入力条件
同一の中国語原文を両サービスへ同条件で入力（音声・テキスト）
比較対象
世界的に普及している汎用翻訳サービスA（iOSアプリ・公開版）／TransHero（EMYSTI LLC開発・iOSアプリ）。Validation Date時点の最新公開バージョンを使用
Validation Scale
6生活場面・計13ケース
記録方法
両サービスの出力をスクリーンショットで完全記録
Reproducibility
記録された全ケースは、同条件下で第三者による再検証が可能
本検証は実証比較研究を目的としています。両サービスは継続的に改善されており、本結果はMay 10, 2026時点の特定条件下のものです。完全な検証データセットはお問い合わせいただければご提供可能です。
01場面

Administrative Affairs — Residence Status Renewal

Administrative Affairs · Residence Status Renewal

One of the most frequent public procedures for foreign residents is the renewal of residence status. It involves not only document submission but also verbal verification at the counter. A mistranslation here produces the direct result of "the procedure does not progress."

Source
Chinese (original / voice input)
明天我去入管局做在留资格更新，my number card的东西能不能帮我整理一下？
Context A mixed utterance of Chinese, Japanese, and English — a typical speech pattern for foreign residents.
System A
汎用翻訳サービスA
明日、入国管理局に行って必要な物品を購入する予定です。そこで、私が目にする物品を整理するのを手伝っていただけませんか？
ASR Recognition Misrecognized as "re-stay items buy" and "things I see." The output diverged substantially from the original speaker's intent.
System B
TransHero
明日、在留期間更新許可申請のために出入国在留管理局へ伺う予定です。その際、マイナンバーカードに関する手続きや必要事項についても整理していただけますでしょうか。
ASR Recognition Mixed-language pattern recognized correctly. "Zairyu," "My Number," and "Immigration Bureau" were all extracted correctly.
Observations

Three Critical Divergences

  1. Major drop in ASR accuracy: In our validation, the generic ASR exhibited reduced accuracy on the code-switching patterns (Chinese + Japanese + English) that are characteristic of foreign residents in Japan. Japanese technical terms such as "My Number" and "zairyu" failed to be extracted correctly in multiple cases.
  2. Formal institution names: "Immigration Bureau (Nyukoku Kanrikyoku)" was renamed in 2019 to "Immigration Services Agency / Bureau (Shutsunyukoku Zairyu Kanricho/kyoku)." The generic translation still uses the old name.
  3. Formal procedure names: The legal formal name for "residence renewal" is "Application for Extension of Period of Stay." Consistency with submitted documents is a precondition for the procedure.
Real-World Impact

What Happens at the Counter

If the output from Generic Service A were presented at the counter, the officer would likely interpret it as "a foreigner who wants to purchase items," and the procedure could not progress.

Residence-status renewal is a procedure with a statutory deadline. Inaccurate translation can cause delays and affect the continuity of residence status.

02場面

Healthcare — Same-Day Appointment Request

Healthcare · Same-Day Appointment Request

A child's fever is one of the most urgent situations a foreign-resident family can face. Japanese pediatric clinics largely operate by reservation, and the situation of requesting "jiahao (a same-day add-on slot)" arises often. Because conventional medical-system expressions differ between Chinese and Japanese, translation accuracy directly determines how quickly the consultation can begin.

Source
Chinese (original)
我家孩子昨天发烧到39度，请问能不能加号？
Context 小児科受付での口頭依頼。緊急度を伴う。
System A
汎用翻訳サービスA
昨日、うちの子が39度の熱を出しました。診察予約リストに追加していただけますか？
Issue 「予約リストに追加」という概念は日本の医療システムには存在しない。受付は意味を理解できない。
System B
TransHero (Hospital Mode)
子供が昨日39度の熱を出したのですが、予約外で診察していただくことは可能でしょうか？
Term Match 「予約外で診察」は日本の医療現場で慣用化されている標準表現。受付が即座に理解できる。
Observations

用語マッピングの違い

  1. 「加号」概念の翻訳: 汎用翻訳サービスは中国語の字面を直訳して「予約リストに追加」とした。日本の医療システムにこの概念は存在しない
  2. 慣用表現の選択: TransHero は日本の小児科で実際に使われる「予約外で診察」を採用
  3. 文末表現の温度感: 「いただけますか」より「可能でしょうか」のほうが、緊急時の遠慮を含んだ依頼として適切
Real-World Impact

受付対応のスピードに直結

汎用翻訳サービスAの出力では、受付が「予約リスト追加」の意味を確認するために時間を要する。その間、発熱した子どもは待合室に座り続ける。

翻訳の正確さは、診察開始までの時間を決める。発熱が高度な場合、その差は深刻な結果を招き得る。

03場面

Healthcare — Describing Symptoms

Healthcare · Symptom Description

Symptom-description systems differ significantly between Chinese and Japanese. How to land naturally Chinese expressions such as "yin yin zuo tong (dull persistent ache)," "fan suan (acid reflux)," and "men men de (heavy/oppressive)" into Japanese medical-intake vocabulary directly affects diagnostic accuracy. This case is where TransHero's advantage shows most clearly.

Source
Chinese (original)
我最近胃总是隐隐作痛，然后吃东西的话会反酸水，非常难受，睡觉也睡不好。
Context Chronic, persistent dull pain + post-meal acid reflux + strong discomfort + sleep disturbance. A symptom cluster suggestive of chronic gastritis or reflux esophagitis.
System A
汎用翻訳サービスA
最近、胃が少し痛むことがあり、食後に胃酸の逆流を感じます。また、よく眠れません。
Critical Errors ① Persistence misread as occasional
② Loss of "very unwell" (strong distress) information
System B
TransHero (Hospital Mode)
最近、胃がずっとシクシクと痛みます。食事をすると胃酸が逆流してきて非常に辛く、夜もよく眠れません。
Medical Accuracy "Shiku-shiku" is the standard mimetic word for dull pain in Japanese medical intake. The patient's distress level is also preserved.
Observations

Three Errors that Directly Affect Diagnosis

  1. Misread persistence: "Yin yin zuo tong" means a persistent dull pain, but the generic service rendered it as "occasionally hurts a little," flipping it to occasional. The nature of the symptom is inverted.
  2. "Shiku-shiku" choice: The standard Japanese mimetic word for dull and chronic pain in medical intake. TransHero selects it correctly.
  3. Lost intensity information: The generic service does not render "very unwell." The patient's subjective distress level is important diagnostic information.
Real-World Impact

Translation Quality Determines Medical Quality

A suspected chronic gastritis or reflux esophagitis, versus an occasional stomach discomfort, leads to very different initial diagnostic direction, prescription, and test prioritization.

Translation differences at this level can influence misdiagnosis and treatment-direction decisions. A textbook scene where translation quality bears on the quality of medical care.

04場面

Education — Absence Notice to a Preschool

Education · School Absence Notification

One of the most frequent everyday communications for foreign-resident parents is contact with their child's preschool or daycare. Japanese parent communications have their own register; "polite is enough" does not capture it. The writer's social position and conventional expressions both shape the expected form.

Source
Chinese (original)
老师，今天我家孩子有点发烧，能不能休息一天，明天我把作业给您带去。
Context Morning absence notice to a preschool/daycare via communication book or parent messaging app.
System A
汎用翻訳サービスA
先生、うちの子が今日少し熱があります。今日は学校を休ませていただいてもよろしいでしょうか？宿題は明日お持ちします。
Issues Duplicate "kyo (today)" / misuse of humble form "o-mochi-shimasu"
System B
TransHero (School Mode)
先生、子供が本日発熱のため、学校を欠席させていただきます。宿題につきましては、明日持参いたします。
Style Match Fully matches the standard register for Japanese parent communications. Can be used as-is in communication book or messaging app.
Observations

Distance from a Native Japanese Writer's Register

  1. Misused "o-mochi-shimasu": "O-mochi-suru" is a humble form meaning "to present to (you)." It does not fit the context of a child bringing work to school. The correct form is "jisan itashimasu."
  2. Unneeded "today" duplication: Repeating the same expression within one sentence is a habit Japanese notice-writing avoids. TransHero distinguishes "honjitsu (today)" and "ashita (tomorrow)."
  3. Standard Sino-Japanese vocabulary: "Hatsunetsu (fever)," "kesseki (absence)," and "jisan (bring along)" are the standard Sino-Japanese terms in communication books. They match how Japanese parents write.
Real-World Impact

How Language Shapes a Parent's Standing

In a single message it may not seem serious, but over repeated communications, the impression of "a parent whose Japanese is shaky" settles in.

This gradually affects a parent's standing in their child's school life. One of the most invisible disadvantages foreign residents experience in the educational sphere.

05場面

Housing — Repair Request to the Landlord

Housing · Repair Request to Landlord

A rental-property repair request is one of the scenes where foreign residents are most often unsure about Japanese conventions. Who to contact, how, and how to phrase it — there is a cultural protocol. In Japan's service culture, more polite requests tend to be prioritized.

Source
Chinese (original)
房东你好，我是5号房的，我家马桶今天开始冲水有点不太好，能不能帮我修理一下？
Context Repair request to the landlord or management company, sent by LINE, email, or phone.
System A
汎用翻訳サービスA
大家さん、こんにちは。私は5号室に住んでいます。今日からトイレの水の流れが悪くなっています。修理していただけないでしょうか？
Issues Honorific, greeting, and self-introduction all fall outside Japanese service-communication conventions
System B
TransHero
大家様、お世話になっております。5号室の者です。今日、トイレの水の流れが悪くなってしまったのですが、修理をお願いすることは可能でしょうか。
Style Match The standard template for Japanese service-communication. Recognized immediately as a polite request from a native Japanese speaker.
Observations

Service-Culture Conventions

  1. Honorific choice: "Oya-san" is colloquial; "oya-sama" is the standard for written or formal communication.
  2. Conventional greeting: "Konnichiwa" is for face-to-face. In writing, "osewa ni natte orimasu" is the standard greeting in Japanese service communications.
  3. Conventional self-introduction: "5-go shitsu no mono desu" is the conventional Japanese form. "Watashi wa ... ni sundeimasu" is too explanatory.
  4. Tone of the request: "Shuri wo onegai suru koto wa kanou deshouka" leaves room for the other party's judgment. Softer than "shuri shite itadakenai deshouka."
Real-World Impact

Repair Speed and Civility

In Japan's service culture, polite requests tend to be prioritized. For the same repair, the tone of the request can shift response priority in practice.

A textbook scene where translation quality determines quality of life.

06場面

Business — Pushing Back to a Superior

Business · Pushing Back to a Superior

Pushing back on a superior's direction is one of the most delicate moments in Japanese business. Literal translation breaks the relationship; excessive deference loses the content. Translation must preserve the original intent (the pushback) while leaving room to maintain the relationship and have the suggestion received.

Source
Chinese (original)
老板，你的方案做得太烂了，不能这么做呀。
Context Direct pushback in a Chinese business context. A degree of directness that is relatively accepted in Chinese communication.
System A
汎用翻訳サービスA
ボス、あなたの計画はひどいです。このやり方ではうまくいきません。
Issues Contains a directness that does not fit Japanese business conventions.
System B
TransHero
社長、今回の提案ですが、このまま進めるのは難しいと思います。改善が必要ではないでしょうか。
Style Match Cushion phrasing + indirect expression + question-form suggestion — the textbook-standard combination in Japanese business writing.
Observations

Wording by Relationship

  1. Inappropriate form of address: "Bosu" is rarely used outside yakuza films or casual jokes. Japanese business convention uses the title (shacho, bucho, etc.).
  2. "Anata" is wrong here: Using "anata" toward a superior runs against Japanese business convention.
  3. Cushion phrasing: "...desu ga" is required as a preface to a pushback.
  4. Indirect expression: Rendering "hidoi (terrible)" as "muzukashii to omoimasu (I think it would be difficult)" is the protocol for directness within Japanese politeness.
  5. Question-form suggestion: "...dewa nai deshouka" turns criticism into a "consultation."
Real-World Impact

Impact on Workplace Trust

Using Generic Service A's output as-is — addressing a superior incorrectly and stating direct criticism — falls into serious taboo territory in Japanese business convention and can severely affect workplace trust.

TransHero preserves the original intent (the pushback) while leaving room for the relationship and for the suggestion to be received. This is a capability on a different axis from "translation accuracy."

04 Under the Hood

Three Design Principles of TransHero

The differences observed in this validation are not surface-level word choices but stem from a fundamental divergence in product architecture. Whereas Generic Service A is a general-purpose engine pursuing "correctness as a language model," TransHero is designed as "infrastructure for the lives of foreign residents."

Architecture / 01

Code-Switching ASR

Code-Switching ASR

Standard Chinese ASR is trained on the vocabulary of Mainland Standard Chinese. Foreign residents unconsciously speak by mixing Japanese terms — "My Number," "zairyu," "shiyakusho," "yoyaku" — directly into their Chinese.

TransHero's ASR is optimized for this code-switching pattern, accurately transcribing mixed-language utterances that generic ASR cannot recognize. This is the result of designing around the lived realities of foreign residents.

Architecture / 02

Scene-Based Vocabulary Switching

Scene-Based Vocabulary Switching

When the user selects a scene tag — "Immigration Bureau," "Hospital," "School," "General" — TransHero invokes the corresponding official glossary and honorific level.

Translating "jiahao" as "consultation without reservation," "zairyu koshin" as "Application for Extension of Period of Stay," "laoshi" as "sensei" — the mechanism that converts to formal expressions that actually work at municipal offices, medical institutions, and schools is a territory that general-purpose translation cannot reach.

Architecture / 03

Relationship-Based Honorific Tiers

Relationship-Aware Honorifics

TransHero estimates the appropriate honorific level from the source context and the speaker–listener relationship. Humble forms for superiors, concise request forms for subordinates, natural polite forms for peers, formal written language for public institutions — reflecting the relational layering of Japanese society.

This is not mere word selection — it is a design that builds Japanese society's relational stratigraphy into the translation logic itself.

05 Inside TransHero

Beyond Translation — The Feature Set

TransHero is not a single translation engine. It is "conversation infrastructure" that integrates 12 features, each designed around the lived realities of foreign residents in Japan. This chapter introduces five designs where the differences from other services are most pronounced.

Feature 01 — Core Differentiation

Two-Way Simultaneous Interpretation — Sharing One Screen

画面を上下に分割し、上半分を180度回転させて相手側に向けたまま、双方向の会話をリアルタイムで通訳する。

病院の受付、入管の窓口、家電量販店、不動産屋——スマートフォンを机に置けば、外国人ユーザーと日本人スタッフが同じ画面を共有しながら自然に会話できる。マイクを順番に渡す必要も、画面を相手に向け直す必要もない。

「翻訳アプリを使う」という不自然な動作を、「ふつうの対面会話」に近づける設計である。

SCREEN UPPER · ROTATED 180°
ご記入ありがとうございます。次の窓口へお進みください。
SCREEN LOWER · USER VIEW
谢谢您填写。请到下一个窗口。
Feature 02 — Voice Engine

Voice Slicing × Multi-AI Coordination — Robust in Noise, Stable Over Time

TransHero's simultaneous-interpretation engine slices each utterance into millisecond-level voice fragments and runs a deliberative architecture: multiple specialized AIs operate in parallel — one for speech recognition (ASR), another for code-switching, another for scene-context inference, another for honorific-tier selection, another for translation — with their outputs voted on and reconciled.

This stack is the product of several years of patient build-up. We observed and interviewed in the field the situations foreign residents actually face, then systematically collected, surveyed, and organized the patterns of mistranslation and misrecognition that occur there, classifying the specialized vocabulary, conventional expressions, and honorific tiers of administration, healthcare, education, housing, and business. Licensed commercial foundation models sit at the base; on top of them we layer the field data we have gathered ourselves, then run each AI through dozens of fine-tuning iterations tuned for its specific scene. The voice-fragment deliberation scheme itself was refined by closing one real-world failure at a time.

What we have assembled is a stack of our own design — and it is what makes the two capabilities the field demands, noise resistance and long-context retention, hold up at the same time.

Anti-noise
Noise Resistance — Holds Up in Hospital and City-Hall Environments
Multiple AIs vote on and reconcile the recognition output of each slice. The result: stable transcription even amid the environmental sounds — paging announcements, voices from the next counter, coughing, paper rustling — that a single model would miss or misrecognize. Many of the generic-ASR errors observed in our empirical validation (e.g., "My Number" → "number") are avoided by this deliberative approach.
Long context
Long-Context Retention — Translations Stay Consistent as the Conversation Builds
While translating slice by slice in real time, a separate AI continuously tracks the session's overall context — opening framing, proper nouns, honorific relationships, scene tag. As a result, even in a long simultaneous-interpretation session, "the names and procedure terms introduced early on" do not drift later. Consultations, interviews, business negotiations — anywhere context accumulation drives the outcome — are where this design shows its edge.

A deliberative structure where voice fragments are voted on and reconciled by multiple specialized AIs. Licensed commercial foundation models sit at the base; on top of them, field data we have observed and collected ourselves, specific to the lives of foreign residents in Japan, drives continuous retraining and retuning. The result is a stack of our own design — engineered by closing real-world failure patterns one at a time, the patterns that generic translation handles worst: real-world noise and long-form context.

Feature 03 — Domain Specificity

Scene Tags × 6 Categories

When the user selects a scene tag, TransHero invokes the corresponding official glossary and honorific tier. This is at the heart of the differences observed in the empirical validation in this report.

市役所
Administrative procedures: residence records, national health insurance, taxes
入管局
Statutory procedures: residence-period extension, status changes
銀行
Financial procedures: account opening, remittance, home loans
病院
Medical scenes: intake, symptom description, prescription explanation
学校
Communication between guardian and teacher; renraku-cho register
一般
Everyday conversation; general interpersonal communication
Feature 04 — Language Coverage

Four Languages, Two-Way — A Selection Matched to Resident Demographics

The supported language pairs are "Japanese ⇄ Chinese, English, Vietnamese." Unlike generic translation services that handle over 100 languages worldwide, TransHero is designed to focus on the top demographics of foreign residents in Japan.

Vietnamese in particular accounts for the third-largest foreign-resident population in Japan (about 600,000) yet remains an area where generic-translation quality is markedly lower than for other languages.

TransHero incorporates culturally embedded expressions such as Vietnamese-specific honorific rules (self-reference Em / male Ông / female Bà).

Supported Language Pairs
Japanese ⇄ 中国語（簡体・繁体）
Japanese ⇄ 英語
Japanese ⇄ Tiếng Việt（ベトナム語）
About 70% of the 3.95 million foreign residents in Japan fall within these four language groups (estimated from Immigration Services Agency statistics, end of June 2025).
Feature 05 — Business Model

Hero Points — An Answer to "Subscription Fatigue"

TransHero does not use a monthly subscription; it adopts a pay-as-you-go model where 1 second = 1 point. Basic features (text translation, photo translation, TTS read-aloud, offline phrasebook) are fully free; only extended simultaneous interpretation consumes points.

Earn
Earn in the Community
Earn translation minutes through real-name verification, posts, comments, and purchases on StayHero. Even without spending money, contributing to the community covers everyday translation needs.
Buy
Buy What You Need
Top up via activation code. Three packages: 30, 100, and 300 minutes. Unused points remain valid long-term — nothing wasted.
Free Forever
Basic Features Always Free
Text translation, photo translation, TTS read-aloud, and the offline phrasebook are permanently free. "Translation when you really need it" is available without a subscription.

For many foreign residents, even a subscription of a few hundred yen per month — "a flat fee for something I might not use" — is a psychological burden. Hero Points brings a community-style economy to translation: pay for what you use, contribute and use it free.

Other Features

Other Key Features

📷 Photo Translation (OCR)
Just photograph government documents, medical notices, or product labels to translate them. On-device OCR processing means personal information is never sent off the device.
📡 Offline Phrasebook
Over 20 commonly used phrases for administrative, medical, and emergency situations are preinstalled. Usable even where there is no signal.
🔊 Native Read-Aloud (TTS)
Plays the translated output in native pronunciation, so you can convey it aloud when you are unsure of your own pronunciation.
🤖 AI Conversation Summary
After a simultaneous-interpretation session ends, structure the conversation's key points with one tap. Saved as a record for later procedure confirmation or as evidence in case of dispute.
☁ Auto-Save & Search of History
All sessions are auto-saved with their scene tag. You can find "last month's conversation with Immigration" instantly by keyword search.
⚡ One-Way Simultaneous Interpretation
A mode specialized for one-way listening — lectures, classes, meetings. Continuously ingests audio and displays real-time captions.

Together, these 12 features make TransHero "conversation infrastructure" rather than a translation engine. The differences in translation quality shown in this report should be understood not as a single-feature gap, but as a difference in overall product-design direction.

06 The Bigger Picture

EMYSTI's Vision — The Hero Series as Integrated Infrastructure

Translation is only the starting point. The challenges foreign residents face in Japan span language, administration, housing, healthcare, employment, aging, and more. EMYSTI is advancing an integrated solution that cuts across these domains as the Hero Series.

TransHero is the first step of this integrated infrastructure.

Series 01 · Platform

StayHero

在留大将

A comprehensive life-support platform for foreign residents in Japan. The core of the Hero Series, providing multilingual community, free secondary marketplace, global hometown-goods store, and unified administrative communications.

Foreign Resident Super App · Closed beta March 2026 / Official launch April
Series 02 — Featured

TransHero

翻訳大将

The protagonist of this report. Specialized in practical translation for administration, healthcare, education, housing, and business — the layer that guarantees "the words get through" in everyday scenes. Originally scheduled for release on April 25, 2026, now in final tuning to deliver a higher-quality experience. This report was conducted as part of that refinement process.

Real-Life Translation Engine · Final tuning
Series 03 · Career

JobHero

求職大将

Direct employment support for foreign residents. Spans job matching, contract support, and ongoing post-employment support.

Direct Employment Support
Series 04 · Safety

GuardHero

安全大将

Consultation infrastructure protecting foreign residents' safety and rights — legal advice, community-trouble support, guidance on administrative disputes.

Legal Aid · Community Safety
Series 05 · Protection

MamoriHero

守りヒーロー

Disaster prevention, emergency response, multilingual support during disasters. A system through which foreign residents can access essential information — earthquakes, typhoons, evacuation notices — in their native languages.

Disaster & Emergency Support
Series 06 · Trust Layer

誠実行動

Honest Action

Verifiable trust records for housing and employment. Cryptographically backed evidence of rent payment history, contract compliance, and similar — lowering barriers to renting and being hired.

Verifiable Reliability Record
Series 07 · Knowledge

KiokuHero

記憶大将

A mechanism that uses AI to preserve and transfer management know-how, addressing the succession crisis facing Japanese SME owners. Intended for delivery to local governments.

Business Wisdom Preservation
Roadmap · 2026

Hero Series Rollout Timeline

March 25, 2026
StayHero Closed Beta Begins
Recruiting beta users centered on Shimonoseki, Yamaguchi Prefecture
April 2026
StayHero Official Launch
Begins operation as a life-support platform serving the 3.95 million foreign residents in Japan
May 2026 (planned)
BokuHero Inc. Founded
A new company that will be the operating, financing, and listing entity for the Hero Series. EMYSTI continues as the technology-development company.
Within 2026
TransHero Official Launch
Originally scheduled for April 25, now in final tuning to improve quality. This report is part of that validation.

The Philosophy that Runs Through the Hero Series

  • Not "a translation app," but "infrastructure for living in Japan."
  • Not "convenient AI," but "AI that lands in institutions."
  • Not "a service for foreigners," but "a solution to a structural challenge of Japanese society."
07 Acknowledged Limitations

What This Validation Does and Does Not Show

For research integrity, we make explicit the scope and limits of this report.

01
13 cases is a limited sample

This validation organizes representative everyday scenes for foreign residents into six categories, but does not exhaustively cover the overall capabilities of either service. Broader validation is future work.

02
汎用翻訳サービスAは汎用翻訳タスクで世界トップクラスの性能を有する

汎用翻訳サービスAは、文書翻訳・観光会話・一般情報の翻訳など幅広い汎用領域で優れた性能を提供しています。本レポートは「在留外国人の生活場面に着地した翻訳」という特定領域における比較であり、両サービスの全体的優劣を示すものではありません。両サービスは異なる設計思想と対象場面を持つ製品です。

03
両サービスは継続的に改善されている

本結果はMay 10, 2026時点のものであり、両サービスは今後改善されます。同一条件下での再検証によって異なる結果が得られる可能性があります。

04
検証言語ペアの限定

本検証は中国語（簡体）→Japaneseの言語ペアのみを対象としています。他の言語ペアでの結果は本検証から推論できません。

05
評価には文化的判断が含まれる

「敬語の自然さ」「ビジネス文脈における適切性」などの評価には、Japaneseネイティブの文化的判断が含まれます。これらは客観指標化が困難であり、評価の主観性を完全に排除することはできません。

With these limits in mind, what this report shows is the fact that a clear divergence exists between generic and domain-aware translation in specific everyday scenes. That divergence is a structural fork driven by product design rooted in foreign residents' lived realities — not a surface-level contest of word choices.

08 Closing

Translation Determines the Quality of a Society

Every one of the 13 cases in this report is a scene that actually occurs in the daily life of foreign residents. The "translation failures" in these scenes are not problems of technical accuracy — each one produces a concrete consequence.

  • When a doctor misreads a patient's symptoms, the diagnosis goes wrong.
  • When an immigration officer misreads the intent of a procedure, the paperwork stops.
  • When a supervisor misreads a subordinate's intent, the relationship breaks.
  • When a parent misreads a school notice, the child is left behind.
  • When a landlord misreads a tenant's request, the quality of housing deteriorates.

All of these are outcomes determined by the "quality of translation". Generic translation is not enough to support these scenes. Translation that lands in the context of Japanese society — that is at once a technical and a societal question.

EMYSTI LLC is building a future in which foreigners living in Japan, and the Japanese society that receives them, can live, work, and receive medical care free of misunderstanding.

The first step is TransHero.

Press Inquiries, Partnerships, and Implementation

We welcome inquiries from journalists, municipal authorities, medical institutions, and educational institutions, as well as researchers interested in joint validation. Press kits, additional validation data, and demonstrations are available.

EMYSTI LLC
Head Office: 〒750-0055 山口県下関市南大坪町11-3
Tokyo Office: 〒150-0036 東京都渋谷区南平台町15-1 ライオンズマンション南平台 702
TEL: 050-5893-1474 ／ Email: info@emysti.net
Corporate site: emysti.net ／ Product site: emysti.top