Confirmed Japanese Support
The Japanese row is checked for interface text and subtitles. That should cover menus, settings, item text, and subtitle presentation at the storefront level, although completeness and translation quality can only be judged in the finished game.
No Japanese Dub Confirmation
The same row does not carry a full-audio checkmark. A Japanese trailer, regional store page, or community tag would not override the language table. If a dub is announced later, this answer and the central language table will be updated together.
Retail Tests
After launch, the guide will verify text selection, font rendering, subtitle size, dialogue coverage, button prompts, independent voice selection, and whether PC and PS5 expose the same choices.
Verification Note
This answer uses the current official Steam listing. Store features can change before release, so the page records a checked date and will be retested against the October 2026 retail build.