Board Thread:Questions and Answers/@comment-39372896-20190505214450/@comment-33747036-20190506062430

If I remember correctly, you can make an Apple account (Apple ID) using Japan as the main country. You’d have to make up some address and name to complete the process before it allows to download using AppStore. You should be able to search jp version in Japan App Store after that. The down side is that you since you’ll have 2 different AppStores, to update apps you need to go to the respective AppStores (where you download those apps). Jp version can be downloaded and updated from Jp AppStore only.