Oh man, Gennosuke is in on this? Damn, I never expected that. Then again, they were never too close and he also doesn't know the details about Iraku and Iku's relationship. He only wants to prove himself to be Iraku's better and to be with Mie, as far as I can see.
I gotta say though, I didn't expect Gonza to be this twisted. He seemed quite honorable, while rough, at the start. I wonder if it's all up to Iraku and Genno or if somebody actually fights and kills off Iwamoto and Gonza. Granted, Iwamoto deserves it WAY more than Gonza.