Sakai was an interesting and a bit controversial character.
There is an interview with him here
http://www.warbirdforum.com/sakai.htm
Beside his feelings for Genda (which are interesting), can anyone say why he was so upset about the Kawanishi N1K1-J? Perhaps not an absolute world beater in 1945 but most pilots at least seems to have considered it to be better than the 'Zero'
Cheers
Stig