band members matatabi - bass , vocals , leader , lyrics , composer kuroneko - vocals , lyrics maneki - guitar , backing vocals karukan - guitar support members dobashi makoto - drums , percussion abe masahiro - keyboards former members atsushi '' tora '' kawatsuka - drums , percussion ( 1999 -- 2009 ) stage names each of the band member 's stage names feature a double entendre with a sense of humor and make references to cat .