Kubomatsu was known as one of the earliest innovators of the shin - fuseki , a revolution in Go theory pioneered by his student Minoru Kitani .
Kubomatsu was go Seigen in the 1930s .
Kubomatsu was known as one of the earliest innovators of the shin - fuseki , a revolution in Go theory pioneered by his student Minoru Kitani and Go Seigen in the 1930s .