Question: Which Japanese mixed martial artist is the former DREAM Openweight Grand Prix Champion was once defeated by Kiyoshi Tamura?

Context paragraphs:
Josh Barnett: Joshua Lawrence Barnett (born November 10, 1977) is an American mixed martial artist and professional wrestler who previously competed in the Heavyweight division of the UFC.  He is the former UFC Heavyweight Champion, as well as the inaugural and current Metamoris Heavyweight Champion.  He has also won the King of Pancrase Openweight Championship and was a finalist in the PRIDE 2006 Openweight Grand Prix and the Strikeforce Heavyweight Grand Prix Championship.  Barnett mixed martial arts record of "over 50-8" when both sanctioned and unsanctioned bouts are counted.  He has also competed in Affliction, World Victory Road, DREAM and Impact FC.

Kazuhiro Tamura: Kazuhiro Tamura (田村和宏, "Tamura Kazuhiro?" , born February 5, 1980) is a Japanese professional wrestler currently working for Pro Wrestling HEAT UP where he is the owner of the company and the current HEAT UP Universal Champion, Tamura also works for All Japan Pro Wrestling (AJPW) where he is a former Gaora TV Champion.  Tamura his also known for the time at STYLE-E Pro Wrestling, holding the STYLE-E Openweight Championship three times and won the E-1 Climax 2010.

Ikuhisa Minowa: Ikuhisa Minowa (美濃輪 育久 , Minowa Ikuhisa , born January 12, 1976) is a Japanese mixed martial artist and professional wrestler currently competing in IGF as Minowaman (ミノワマン , Minowaman ) .  A professional competitor since 1996, he was a longtime veteran of PRIDE and Pancrase and has also competed in other mixed martial arts promotions such as K-1 Hero's, Cage Rage, the SFL, Vale Tudo Japan, UFC, DREAM, and DEEP.  He is the former DREAM Openweight Grand Prix Champion (Super Hulk).

Akitoshi Tamura: Akitoshi Tamura (born May 31, 1980) is a Japanese mixed martial artist.  He competed almost exclusively in the Shooto organization, before making his debut at the WEC 37.  In 2007, he was the lightweight champion of Shooto.  He was once ranked as the #5 Bantamweight in the world by the MMAWeekly Worldwide Ranking System.  Tamura is a freestyle fighter.

Kiyoshi Tamura: Kiyoshi Tamura (田村潔司 , "Tamura Kiyoshi" , born December 17, 1969 in Okayama, Okayama) is a Japanese middleweight professional wrestler and mixed martial artist.  Once a student of legendary pro wrestlers Billy Robinson, Nobuhiko Takada and Akira Maeda, Tamura is known for his skill in catch wrestling as well as his ability to deliver exciting professional wrestling bouts.  He has competed in some form or another for the following organizations: Universal Wrestling Federation, UWF International, Fighting Network RINGS, K-1, PRIDE, and U-STYLE, his own promotion, often fighting much larger opponents.  In mixed martial arts, he holds notable victories over Renzo Gracie, Jeremy Horn, Ikuhisa Minowa, Masakatsu Funaki and Kazushi Sakuraba.

Issei Tamura: Issei Tamura (田村 一聖 , Tamura Issei , born March 12, 1984) is a Japanese mixed martial artist who competed most recently in Pancrase and the Ultimate Fighting Championship.  Before signing with the UFC, Tamura fought for the Shooto organization.

Dokonjonosuke Mishima: Yoshitomi Mishima (三島睦智 , Mishima Yoshitomi ) known as Dokonjonosuke Mishima (三島☆ド根性ノ助 , Mishima Dokonjōnosuke , born April 19, 1972) , also written Dokonjyonosuke Mishima, is a Japanese mixed martial artist and professional wrestler.  He has competed professionally since 1998 in organizations such as Shooto, DEEP, PRIDE, the UFC and in his pro wrestling days he has competed in Kiyoshi Tamura's organization U-Style Pro Wrestling.

List of Dream champions: This is a list of champions in the Dream organization at each weight class.  Dream is a Japanese mixed martial arts organization, originally promoted by Fighting and Entertainment Group, and over management of Glory Sports International since October 2012.  The first two champions were crowned after the 2008 Lightweight and Middleweight Grand Prix, while the 2009 Welterweight and Featherweight GPs have crowned the champions at those weights.  The 2010 Light Heavyweight Grand Prix crowned the first Dream Light Heavyweight Champion at Dream 16.  The 2011 World Bantamweight Grand Prix crowned the first ever Dream Bantamweight Champion at Dynamite!!!  2011.

Igor Vovchanchyn: Igor Yaroslavovych Vovchanchyn (Ukrainian: Ігор Ярославович Вовчанчин ; born August 6, 1973) is a retired Ukrainian mixed martial artist and kickboxer.  After making his professional MMA debut in 1995, he won nine mixed martial arts tournaments, 3 superfights, holds the second longest unbeaten streak in MMA (at 37 fights), has the 6th most wins in MMA (61), and reached the final of the PRIDE 2000 Openweight Grand Prix.  He is widely considered an MMA legend, and in Ukraine he even has a tournament named after him, the "Igor Vovchanchyn Cup".

Masanori Kanehara: Masanori Kanehara (born November 18, 1982) is a Japanese mixed martial artist currently competing in the UFC's Bantamweight division.  A professional competitor since 2003, Kanehara has formerly competed for World Victory Road, K-1, DEEP, Pancrase, ZST, and also made an appearance at Dynamite!!  2009.  Kanehara is the 2009 Sengoku Featherweight Grand Prix Champion and inaugural Sengoku Featherweight Champion.

Supporting paragraphs: Kiyoshi Tamura Ikuhisa Minowa
Answer: Ikuhisa Minowa