Question: What gym did Kevin Randleman, who has faced opponents such as Kenichi Yamamoto, train at?

Context paragraphs:
Kotetsu Yamamoto: Kotetsu Yamamoto (山本小鉄 , Yamamoto Kotetsu , October 30, 1941 – August 28, 2010) was a former professional wrestler, referee, and color commentator for New Japan Pro Wrestling.  His real name was Masaru Yamamoto (山本 勝 , Yamamoto Masaru ) .  He was named "Kotetsu" by a former Japanese pro wrestler Toyonobori after Aizu-No-Kotetsu, a knight.  Originally a wrestler, Yamamoto was mostly known for his tag team The Yamaha Brothers with Kantaro Hoshino but made his biggest mark as a trainer in the New Japan Dojo having helped train Keiji Mutoh, Jushin Thunder Liger, Minoru Suzuki, Shinsuke Nakamura, and Masahiro Chono among others.

Kenichi Yamamoto (mixed martial artist): Kenichi Yamamoto (山本 喧一 , Yamamoto Ken'ichi ) is a Japanese mixed martial artist and professional wrestler.  Known for his pro wrestling career in UWF International, Yamamoto also competed against some of the best MMA fighters of his era in RINGS, Pride and the UFC, taking on Kevin Randleman, Genki Sudo and Pat Miletich, among others.

Ask This of Rikyu: Ask This of Rikyu (利休にたずねよ , Rikyu ni tazune yo ) is a 2013 Japanese biographical film directed by Mitsutoshi Tanaka and based on a novel by Kenichi Yamamoto.  This film won the award of Best Artistic Contribution at Montreal World Film Festival in 2013.

Kingdom (professional wrestling): Kingdom was a professional wrestling company in Japan from 1997 to 1998.  It was essentially a continuation of UWF International, having most of its former roster: Nobuhiko Takada, Yoji Anjo, Kazushi Sakuraba, Daijiro Matsui, Naoki Sano, Masahito Kakihara, Yoshihiro Takayama, Kenichi Yamamoto and Hiromitsu Kanehara.

Kenichi Yamamoto (skier): Kenichi Yamamoto (山本 謙一 , Yamamoto Ken'ichi ) (born November 18, 1922) was a Japanese cross-country skier who competed in the 1950s.  He finished 22nd in the 18 km event at the 1952 Winter Olympics in Oslo.

Kenichi Yamamoto (yakuza): Kenichi Yamamoto (山本 健一 , Yamamoto Ken'ichi , March 5, 1925 – February 4, 1982) was the founder of the Yamaken-gumi yakuza gang, who were based in Kobe, Japan.  It is the largest affiliate of the Yamaguchi-gumi.

Mike Farragher: Michael Joseph Farragher (January 2, 1871 – October 21, 1934) was a well-known welterweight boxer from Youngstown, Ohio.  In the late 19th and early 20th centuries, Farragher faced opponents in venues such as New York City; Wheeling, West Virginia; Cleveland, Ohio; and Homestead, Pennsylvania.

Kevin Randleman: Kevin Christopher Randleman (August 10, 1971 – February 11, 2016) was an American mixed martial arts fighter and a former UFC Heavyweight Champion.  Randleman's background was in collegiate wrestling, and he competed in the heavyweight and light heavyweight classes.  Randleman had fought in the UFC, PRIDE, WVR, and Strikeforce.  He was previously associated with Mark Coleman's Team Hammer House, before training at Randy Couture's gym in Las Vegas, Nevada.

Yamaken-gumi: The Fourth Yamaken-gumi (四代目山健組 , Yondaime Yamaken-gumi ) is a yakuza gang based in Kobe, Japan.  It is the largest affiliate of the largest known yakuza syndicate in Japan, the Yamaguchi-gumi, followed by the Nagoya-based Kodo-kai.  It takes its name from its founder, Kenichi Yamamoto.

Team Hammer House: Team Hammer House is a mixed martial arts team operating out of Columbus, Ohio, made up of mostly former NCAA wrestlers.  While Hammer House focuses on amateur wrestling they do have cross training deals with notable fighters and camps such as Matt Serra, Pat Miletich and Xtreme Couture Mixed Martial Arts.  Founded by former UFC champion Mark Coleman, Team Hammer House has attracted such mixed martial arts fighters as Kevin Randleman and Phil Baroni.

Supporting paragraphs: Kenichi Yamamoto (mixed martial artist) Kevin Randleman
Answer: Randy Couture's gym in Las Vegas