Masaki Takemiya (武宮 正樹, Takemiya Masaki, born January 1, 1951) is a professional Go player.

Masaki Takemiya was born in Japan. He became one of the many disciples of the Minoru Kitani school. His rise to fame began when he was only 15 years old. He earned the nickname "9 dan killer" because he won several games against top rated players. His famous "cosmic style" of Go would become popular among fans. It focused on large moyo in the center of the board. He's known as keeping a consistent record of winning titles. The longest period in which he did not hold a title has only been 4 years. He closed off 2005 with an impressive win of 16 straight games, which was stopped by Omori Yasushi in the qualifiers for the 3rd World Oza.

Outside of Go, Takemiya also won the biggest Japanese backgammon tournament, the 12th Saint of the Board title, by beating the former holder, Abe Akiko.

Four of Takemiya's books have been published in English -- Enclosure Joseki (Kiseido Press), now out of print; Imagination of a Go Master (NEMESIS Enterprises),^[1] This is Go the Natural Way! (Hinoki Press);^[2] and Cosmic Go (Board N' Stones).^[3]

Takemiya is known for his "Double 4" fuseki when he uses white, where he usually starts the game like so:

"Double 4" fuseki (White).

Takemiya is a favorite among amateur go players because of his very thick playing style as black. His sanrensei (three star) openings involve plenty of fights.

Takemiya's famous moyo (right side)

The sequence of moves from 00-07 in the lower right corner involves a common joseki that creates a moyo in conjunction with the triangled stone. Takemiya often plays a variation of this joseki but has made a few innovations of his own such as the kosumi in response to the same corner approach in the upper right corner. The resulting sequence could result in moves 08-13, where 09 is the kosumi move.

Takemiya is one of the top title holders in Japan.