[Mr. DJ]

Just like every other captain of the 11th Division, Kiganjō became the captain and the new "Kenpachi" by killing the previous captain of the 11th Division, the 9th Kenpachi. He in turn was killed by Kenpachi Zaraki in front of 200 members of the 11th Division. Prior to becoming the Kenpachi, Kiganjō's name was Gosuke Kiganjō (鬼厳城 五助, Kiganjō Gosuke).
When Kiganjō failed to turn up to the captains' meeting called to introduce Kisuke Urahara, Shinji Hirako commented that Kiganjō was a slacker who, as usual, was not listening to what he was told. Shinji goes on to claim that he was a "pain in the ass" and wondered why "such a piggish guy" had been allowed to become a captain. Love Aikawa points out that it couldn't be helped, given that the 11th Division is setup differently and that if anyone is to be blamed for Kiganjō's presence among them, it is the previous Kenpachi for dying to Kiganjō.
Kiganjō was also not present during the captains' meeting that was called to respond to the emergency surrounding the vanishing soul incident when Kensei and Mashiro disappeared

for what it's worth from BleachWiki *shrug*