<del>Does PKHeX support Region Japan card?
When I use my Region Japan (Language is English) card, PKHex says "Save file is not decrypted. Press Yes to...".
And then, I continued by selecting "Yes", and there seems no error in Box and Party, but "Tools" > "Export SAV" is grayed out .
Maybe this is because checking system of PKHeX is not compatible with Region Japan saves.
I hope they support it.
Needless to say, but I fully decrypted my save. (with "XOR Saves")</del>
Sorry, but this was my fault.