Japan: AI content labelling rules

The rules on labelling AI-generated content in Japan, what each asks of a file, and what one Kennmarq.com call adds.

In short

Images: No general rule found
Video: No general rule found
Audio: No general rule found
Text: No general rule found
3D: No general rule found
Rules: 1 for some sectors only.
In the API: markets=jp

Updated 4 November 2026; sources checked 4 November 2026. Sources are government sites. This page explains what Kennmarq.com does; it isn't legal advice.

No general labelling law found. The AI Promotion Act's guideline (19 Dec 2025) asks firms to develop and, where needed, use watermarks and provenance tools.

Rules for specific sectors

Political ads and campaigns

Public Offices Election Act, Art. 142-5 (Act 58 of 2026): Passed; applies from 1 March 2027. A notice on screen that realistic images or video were made or altered with AI; minor edits exempt.

In the API

Send markets=jp on each call to POST /v1/mark: a call that lacks what Japan's rules need is refused before anything is counted, and each mark gets a receipt of what it carries for each law.

What a mark for Japan carries, by kind of file
File	Made with AI	A deep fake (`deepfake=true`)
Picture	Watermark and Content Credentials	Watermark and Content Credentials
Clip	Watermark and Content Credentials	Watermark and Content Credentials
Song	Watermark and Content Credentials	Refused for now: a song can't carry a visible label, and spoken notices for deep fakes aren't available yet: leave "deepfake" off for songs.

Mark a picture for Japan

curl https://api.kennmarq.com/v1/mark \
  -H "Authorization: Bearer $KENNMARQ_API_KEY" \
  -F file=@image.png \
  -F source=created \
  -F markets=jp \
  -o image.marked.png

An AI coding agent gets the same answer from the MCP tool get_requirements (MCP server).

Japan on the map, and every country's rules side by side.