Hi~
Previously we promised to include a Japanese version at the time of release, but due to various reasons, we couldn't do it at the time of release.
very sorry~
The Japanese version is now finished and will be added in today's update.
For players in Japan who have already purchased the game, thank you for waiting.
If you still have questions, please add discord
Discord: https://discord.gg/m9wAwyhcFU