This game should use the Taiwanese or Chinese tag. The version that is currently uploaded is the mainland China (PRC) version. That is what the 3DMGAME site says anyway (https://dl.3dmgame.com/pc/53513.html). While the copy that is on its way is the Taiwanese release. The game is certaintly not Japanese
https://www.legendsworld.net/adventure/game/31452
The description on the 3DMGAME site is wrong, but at least the download matches the product displayed.