Decisions · Policy · Japan
The flexible copyright exception for 'non-enjoyment' purposes: recent amendment in Japan and its implication
Tatsuhiro Ueno (Waseda University) · 2021 · Proposal · non-binding
Can AI be trained on protected works?
Freely allowed
Uses that don't 'enjoy' a work, including commercial data mining, fall outside copyright's purpose
What it says
Ueno explains Article 30-4 of the Japanese Copyright Act, which permits any use not aimed at enjoying a work, including commercial text and data mining. Its rationale is that such uses do not affect rightholders' chance of being paid for enjoyment of their works, an idea he finds echoed in European theories.
The leading account, in English, of the Japanese rule that makes Japan one of the most training-friendly systems.
Sources
This record
Data as of 2026-10-21.
Drafted with AI assistance and checked against the sources linked above; not yet reviewed by a lawyer. Methodology
No changes logged yet. The change log started on 2026-10-20.