Board Thread:Anime/Game Discussion/@comment-46009402-20200606031106/@comment-38952966-20200606033100

Lol I get why you'd be confused. Josuke got his fever at the same time as Holy. He should've been 5 at the time but the anime puts him at 4 due to a mistranslation that mistakenly sets Stardust Crusaders in 1987, when it was actually set in 1988-1989. So Josuke would've been 5, turning 6 the year he overcame his fever.