YOU SAID:
https://launchermeta.mojang.com/mc/game/version_manifest.json
INTO JAPANESE
https://launchermeta.mojang.com/mc/game/version_manifest.json
BACK INTO ENGLISH
https://launchermeta.mojang.com/mc/game/version_manifest.json
INTO JAPANESE
https://launchermeta.mojang.com/mc/game/version_manifest.json
BACK INTO ENGLISH
https://launchermeta.mojang.com/mc/game/version_manifest.json
You should move to Japan!