Because Kiyokado KANZE (23rd head of the Kanze family) had no legitimate son, he adopted Kiyohisa, a son of his younger brother, Kurosaburo KATAYAMA who had been adopted to Katayama family.
二十三世観世清廉には実子がなかった為、実弟で片山家に養子に出ていた片山九郎三郎の子である清久が養子に入った。