Zachary Scott @_zzak (Ex-Roomate, Co-Staff of RubyKaigi)
I've known Hamasaki-san for about 2 years now, his hard work on RubyKaigi and job are repeatedly visible. I always see him carrying a laptop, and when he stayed with me last year, for 2 weeks all he did was work.. and eat ramen. I'm confident that if I recommend hmsk for any job he would work his hardest no matter what it is.
Yohei Okada (Co-worker at WebPay, Inc.)