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The 45th Judan was held from May 11, 2006^[1] to April 25, 2007. The current sponsor is Sankei Newspapers.^[1] The holder is Cho Chikun, and the challenger is Keigo Yamashita for the second time in a row. Hideki Komatsu, Norimoto Yoda, Kimio Yamada, Hideo Otake, Koichi Kobayashi, Kim Shushun, Naoki Hane, and Takeshi Sakai qualified through preliminary tournaments.^[2] The rest of the players were given spots automatically.

Preliminaries

Semifinals		Finals

Koichi Kobayashi Honorary Kisei	1

Naoto Hikosaka 9 dan	0
		Koichi Kobayashi Honorary Kisei	0

		Shinya Nakamura 8 dan	1
Shinya Nakamura 8 dan	1

Katsunori Yanaka 8 dan	0

Round of 16		Quarter-finals		Semi-finals		Final



Satoru Kobayashi 9 dan	1

So Yokoku 8 dan	0
		Satoru Kobayashi 9 dan	1

		Kim Shushun 7 dan	0
Hiroshi Yamashiro 9 dan	0

Kim Shushun 7 dan	1
				Satoru Kobayashi 9 dan	0

				Keigo Yamashita Kisei	1
Takeshi Sakai 9 dan	0

Norimoto Yoda 9 dan	1
		Norimoto Yoda 9 dan	0

		Keigo Yamashita Kisei	1
Koichi Kobayashi Honorary Kisei	0

Keigo Yamashita Kisei	1
						Keigo Yamashita Kisei	1

						Cho U Gosei	0
Cho U Gosei	1

Shinji Takao Meijin	0
		Cho U Gosei	1

		Hideki Komatsu 9 dan	0
Hideo Otake Honorary Gosei	0

Hideki Komatsu 9 dan	1
				Cho U Gosei	1

				Kimio Yamada 9 dan	0
Kimio Yamada 9 dan	1

Tomoyasu Mimura 9 dan	0
		Kimio Yamada 9 dan	1

		O Rissei 9 dan	0
Naoki Hane 9 dan	0

O Rissei 9 dan	1

Player	1 (Niigata)	2 (Gamagori)	3 (Ōmachi)	4 (Matsuyama)	5 (Chiyoda)	T
Cho Chikun (Judan)	W+R	B+2.5			B+3.5	3
Keigo Yamashita (Challenger)			B+R	W+R		2

^ ^a ^b ^c ^d ^e "Nihon Ki-in: Judan Title". Archived from the original on 2007-04-23. Retrieved 2007-02-21.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j "Judan title from Igo-Kisen". Archived from the original on 2007-02-22. Retrieved 2007-02-21.