Thread:J.Hideto Natsume/@comment-10733658-20150518154920/@comment-10733658-20150519075350

I'm wondering if perhaps there's some language barrier issue going on?

No one is stating that Juuzou cannot read. He's technically not wrong, since both were born in the same year. Kaneki's birthday is simply at the very end of the year, while Juuzou's is mid-year. We don't know what information is normally on a Japanese school ID, so we don't know how much exact information Juuzou had.

Kaneki is about to turn 19 at that point in the story, but his 19th Birthday has not occurred yet.