Moooshi moooshi
First off, congrat's on the release. I'm sure you relative and the family must be feeling so excited.
Is he a Japanese citizen?
I am wondering if they will deport him back to his country upon release.
I have no idea baout Japanese prison laws, but It would be my guess and say no to an early release..
Can't you find out from a Japanese government consulate?
Will they tell you?