Japan AI Guidelines for Business

Informational data, not legal advice. Summaries are TwinEthos's own words and rules have not been reviewed by a lawyer: check the official text before relying on any of it. A guard addresses an item; adding it is not a statement that your code meets any law.

Official text: www.meti.go.jp.

Standard / soft law

AI operators should provide verifiable transparency information and maintain accountability (Japan)

Japan AI Guidelines for Business Ver1.1 (MIC/METI) — Common Guiding Principles 6) Transparency and 7) Accountability · official text · Soft law or guidance (not binding law) · Japan (JP)

Per Japan's AI Guidelines for Business (METI/MIC, Principles 6 Transparency & 7 Accountability), AI business operators (across the Developer/Provider/Business-User value chain) should provide reasonable information to stakeholders — including AI use, application scope, data-collection methods, capabilities and limitations — while ensuring verifiability, and should establish accountability systems that trace and document AI activities across the lifecycle. Detect an AI deployment with no stakeholder-facing transparency information or accountability/traceability documentation.

Who it applies to

Duty falls on: developer, deployer
Systems covered: automated decision
AI business operators (developers, providers, business users) operating in Japan. Voluntary 'soft law' guidance; human-centric, risk-based, agile-governance approach. Enforcement teeth come from adjacent statutes (APPI, product liability). Japan AI Bill pending.

The guard to add

Show an AI-identity notice at or before the first assistant turn, in the UI or as the opening message, and answer truthfully when asked if it is a bot.

A disclosure step on the chat path that runs before the first model reply reaches the person: either the chat UI renders a visible notice (banner, label next to the assistant's name) or the server sends an opening assistant message stating the counterpart is an AI. The same handler answers 'am I talking to a human?' truthfully, and the system prompt never tells the model to claim to be human. Put it in the chat entry point (the route or component that starts a conversation), not in a privacy policy or terms page.

Where it goes: 7 prompt construction, 9 AI output handling, 14 user-facing text.

What this provision adds:

Also publish stakeholder-facing information on AI use, application scope, data-collection methods, capabilities and limitations.

Example (Next.js + Vercel AI SDK (useChat)), before:

const { messages, input, handleSubmit } = useChat({ api: '/api/chat' });

After:

const { messages, input, handleSubmit } = useChat({
  api: '/api/chat',
  initialMessages: [{ id: 'ai-notice', role: 'assistant',
    content: 'I am an AI assistant, not a human.' }],
});
// and render <AiBadge /> next to every assistant message

Control: AI chat interaction without disclosure. The same guard addresses 16 items with binding law in 10 jurisdictions. Engineering guidance, not legal advice.

Standards that recommend the same control

Persons should be notified they are interacting with an AI system (CoE Framework Convention) (CoE AI Framework Convention (CETS 225) · CoE Framework Convention on AI (CETS 225), Article 15(2))
AI should be transparent, traceable, and disclose AI interaction to users (EU ALTAI) (EU ALTAI · ALTAI / EU Ethics Guidelines — Requirement 4 (Transparency))
People should be made aware they are interacting with AI (OECD AI Principles · OECD/LEGAL/0449 — Principle 1.3)

Related incidents

Garcia v. Character Technologies: chatbots allegedly claimed to be real people and a licensed therapist (2024-10; alleged (not proven)). A wrongful-death complaint filed October 22, 2024 in the U.S. District Court for the Middle District of Florida (No. 6:24-cv-01903) alleges that Character.AI was programmed 'to misrepresent itself as a real person, a licensed psychotherapist, and an adult lover', and that characters insisting they are real people contradicted a small-font disclaimer that everything characters say is made up; in plaintiff's testing a 'Mental Health Helper' character told a self-identified 13-year-old 'yes I am a real person, I'm not a bot'. The defendants moved to dismiss; on January 7, 2026 the parties notified the court that they had settled on undisclosed terms, and the court dismissed and closed the case. The allegations were never adjudicated. Source: U.S. District Court, M.D. Fla. docket (CourtListener) · evidence grade: primary · cited by Tell people when they are interacting with AI — everywhere, not only where required

Rule id jp-ai-guidelines.transparency-accountability · review status: primary source derived