The Fourth Division in the Gotei 13 is known as the medical division, responsible for delivering medical attention to wounded; as of the post thousand year blood war they also became responsible for taking care of funerals for the deceased, too. It was started over 1,000 years ago by Tatsujin Chiyu'i. Yachiru Unohana later left the Eleventh Division and went over to the Fourth Division, becoming the Soul Society's primere healer; after her death, however, Tatsujin Chiyu'i returned to her position as the Fourth Division Captain, as well as the absolute head of the medical teams and relief teams in the Soul Society. The Lieutenant of the Fourth Division is Rin Tsukuyo.