In 1886, Shuei officially approved Shuho being 8-dan at the same time he stepped aside to make him to the Honinbo, thus Shuho became the 18th Honinbo Shuho.
明治19年に秀栄は秀甫の八段を正式に認めて、同時に本因坊を秀甫に譲り、秀甫は18世本因坊秀甫となる。