Hon'inbō ChihakuHon'inbō Chihaku was a Japanese professional go player, and sixth head of the Hon'inbō house.He was a nephew of Hon'inbō Dōchi. He died young, before an official heir had been appointed.''Oshirogo''1722 against Inoue Insetsu Inseki 1723 against Hayashi Bonkyu 1725 against Hayashi Incho, against Inoue Yuseki 1726 against Inoue Insetsu Inseki 1727 against Yasui Senkaku, 1728 against Hayashi Incho, 1730 against Inoue Shunseki 1731 against Inoue Shunseki, 1733 against Inoue Shunseki