PairGoChampionship

(ペア碁選手権戦) Japanese unofficial Tournament. 32 male and female top professionals form 16 mixed pairs by drawing of lots and compete in a single elimination tournament.

The tournament name was preceded by "Ricoh Cup" up to the 15th edition, because the company was the only sponsor. After Ricoh stepped down, the tournament was sponsored by various companies.

• 1995, 1st: Hashimoto Shoji & Konishi Kazuko
• 1996, 2nd: Kobayashi Koichi & Kobayashi Izumi
• 1997, 3rd: Yuki Satoshi & Chinen Kaori
• 1998, 4th: Honda Kunihisa & Aoki Kikuyo
• 1999, 5th: Honda Kunihisa & Aoki Kikuyo
• 2000, 6th: Tono Hiroaki & Yoshida Mika
• 2001, 7th: Yoda Norimoto & Kusunoki Teruko
• 2002, 8th: Cho Chikun & Kuwabara Yoko
• 2003, 9th: Cho Chikun & Kuwabara Yoko
• 2004, 10th: Yamashita Keigo & Kobayashi Izumi
• 2005, 11st: Mimura Tomoyasu & Aoki Kikuyo
• 2006, 12nd: Cho U & Suzuki Ayumi
• 2007, 13rd: Yamada Kimio & Okada Yumiko
• 2008, 14th: Cho Chikun & Osawa Narumi
• 2009, 15th: Hane Naoki & Kato Keiko
• 2010, 16th: Block A:Sakai Hideyuki & Ishii Akane Block B:Takao Shinji & Umezawa Yukari
• 2011, 17th: O Meien & Xie Yimin
• 2012, 18th: O Meien & Xie Yimin
• 2013, 19th: Kobayashi Satoru & Xie Yimin
• 2014, 20th: Iyama Yuta & Yashiro Kumiko
• 2015, 21st: Hane Naoki & Koyama Terumi
• 2016, 22nd: Murakawa Daisuke & O Keii
• 2017, 23rd: Hane Naoki & Fujisawa Rina
• 2018, 24th: Iyama Yuta & Kato Keiko
• 2019, 25th: Ichiriki Ryo & Fujisawa Rina
• 2020, 26th: Murakawa Daisuke & Okuda Aya
• 2021, 27th: Ichiriki Ryo & Chinen Kaori
• 2022, 28th: Sada Atsushi & Okuda Aya