Board Thread:Questions and Answers/@comment-50.50.204.43-20130829205159/@comment-1173941-20140627235353

We really can't be sure on his age, though. They likely attended University together, which could put Sugou at any age compared to Kayaba. That said, Sugou says that Kayaba was his "senpai", which would probably make Sugou younger than Kayaba.