Osae

Osae is a Japanese Go term that means “to press down” or “to block.” It describes a move used to prevent the opponent from extending or escaping, often appearing in local fights and life-and-death situations.

In practice, an osae move can help solidify territory or limit an invading group’s options. It is typically played along the edge of an ongoing sequence where a push or hane has occurred, and the opponent threatens to move further.