Official media referenceDirect answer
Japanese interface, subtitles and voice are not listed as supported on the cited Steam launch page.
How to use this page
Language status can change after release. The live Steam language table is the authority; machine-translated overlays are not official localization.
What is verified
- Check interface, subtitle and full-audio columns separately.
- Do not infer Japanese support from controller or console plans.
- Wishlist or community demand is not a roadmap.
- Update only when an official language table or announcement changes.
Sources and verification
Official facts are separated from developer estimates and unverified community claims.