Yes, Mashiro and Kensei kill him.
Episode 209, it is now subbed and dubbed.
No he doesn't. He takes on Aizen by himself and then is attacked by Wonderweiss. His Zanpak-to, Extinguir, was designed to absorb Head Captain Yamamoto's Zanpak-to, Ryujin Jakka. Yamamoto takes out Wonderweiss using his bare hands. Aizen waited for this fight to be over, so he could kill Yamamoto after being worn out from his fight with Wonderweiss. Yamamoto is cut down by Aizen, but I doubt that he's dead. He's probably just unconscious. Not even Aizen with the help of Wonderweiss' Extinguir can kill Head Captain Yamamoto.
Kensei Hasegawa was born in 1943.
Kensei Mizote was born in 1942.
Ken Kensei is 5' 6".
Kensei Mikami is 180 cm.
Yes Kensei Muguruma is dead. He was killed by Zaraki but many people are speculating that Kensei may return to Bleach.
The name kensei means "sword saint"
Ken Kensei was born in 1954, in Kochi, Japan.
Takezo Kensei Sword Saint - 2007 Chapter 4 Part I Kensei and the Dragon 1-4 was released on: USA: 2007
Episode 251 The tale of 2 warriors (this is the episode the fight starts)