Honinbo is a prestigious title in the game of Go, a strategic board game that originated in China. The title is named after the Honinbo house, which was established in Japan during the 17th century. It represents the highest rank a player can achieve in the traditional Japanese Go ranking system. The Honinbo tournament is one of the major professional Go competitions in Japan, attracting top players from around the world. The winner of this tournament is awarded the Honinbo title for one year, signifying their status as one of the best Go players globally.