Kaz Hayashi

On March 27, 2017, it was announced that Hayashi would become Wrestle-1's new president on April 1 with Shuji Kondo as his vice president.

In June 2013, Hayashi announced his resignation from All Japan in the aftermath of Nobuo Shiraishi taking over as the president and Keiji Mutoh leaving the promotion. Hayashi's final match for the promotion took place on June 30 and saw him and his longtime tag team partner Shuji Kondo, who was also leaving All Japan, unsuccessfully challenge Burning (Atsushi Aoki and Kotaro Suzuki) for the All Asia Tag Team Championship.

On July 10, 2013, Hayashi was announced as part of Keiji Mutoh's new Wrestle-1 promotion. During the promotion's inaugural event on September 8, Hayashi teamed with Shuji Kondo in a tag team match, where they were defeated by the Big Japan Pro Wrestling team of Daisuke Sekimoto and Yuji Okabayashi. As part of a working relationship between Wrestle-1 and American promotion Total Nonstop Action Wrestling (TNA), Hayashi and Kondo earned a shot at the TNA World Tag Team Championship by defeating Desperado (Kazma Sakamoto and Masayuki Kono) on February 15, 2014. On March 2 at Kaisen: Outbreak, Hayashi and Kondo unsuccessfully challenged The Wolves (Davey Richards and Eddie Edwards) for the TNA World Tag Team Championship in a three-way match, which also included The BroMans (Jessie Godderz and Robbie E), who went on to win the match and become the new champions. On September 22, Hayashi entered the Wrestle-1 Championship tournament, but was defeated in his first round match by Kondo. On October 12, Hayashi worked TNA's Bound for Glory event in Tokyo, unsuccessfully challenging Samoa Joe for the TNA X Division Championship in a three-way match, which also included Low Ki. In November, Hayashi and Kondo took part in the First Tag League Greatest tournament, set to determine the inaugural Wrestle-1 Tag Team Champions, where they finished second in their block with a record of three wins and one loss, advancing to the semifinals. On November 30, Hayashi and Kondo first defeated Kai and Ryota Hama in the semifinals and then Akira and Manabu Soya in the finals to win the tournament and become the inaugural Wrestle-1 Tag Team Champions. After seven successful title defenses, they lost the title to Soya and Jun Kasai on July 12, 2015. On October 9, Kondo broke off his partnership with Hayashi. On January 31, 2016, Hayashi, Minoru Tanaka and Tajiri won the vacant UWA World Trios Championship. They lost the title to Andy Wu, Daiki Inaba and Seiki Yoshioka in their fifth defense on July 29. On September 18, Hayashi and Kotaro Suzuki won the vacant Wrestle-1 Tag Team Championship. They lost the title to Koji Doi and Kumagoro on March 20, 2017.

On February 6, 2009, Hayashi defeated Naomichi Marufuji to win the World Junior Heavyweight Championship for a second time. During Hayashi's 23-month reign, he successfully defended the title a record–breaking seventeen times. He would lose the title to Minoru on January 2, 2011.

After returning to Japan, Hayashi eventually decided to join All Japan Pro Wrestling (AJPW) due to his friendship with Keiji Mutoh and established himself as one of their top stars, winning the World Junior Heavyweight Championship and both the World Tag Team Championship and the All Asia Tag Team Championship with Satoshi Kojima. In 2006, Hayashi won the AJPW Junior League tournament.

Hayashi's contract was bought by the World Wrestling Federation (WWF) following their purchase of WCW in early 2001. He was first sent to WWF's developmental territory the Heartland Wrestling Association (HWA) before being moved to the main roster. Hayashi made his WWF main roster debut during the Invasion storyline as a member of The Alliance faction but only made one appearance before returning to HWA and ultimately heading back to Japan.

In mid-2000, Hayashi formed the stable The Jung Dragons along with Jamie-San and Yang. Primarily feuding with 3 Count, the Jung Dragons consisted of high-flying cruiserweight talent and gained considerable popularity until the group's demise the following year. During this time, he became friends with Keiji Mutoh, who was appearing in his final run with the promotion under his Great Muta guise.

After unmasking, Hayashi joined WCW in 1998. Early on, he was relegated to a jobber and comedy character. He would be taken under the management of Sonny Onoo and even come to inherit Glacier's ceremonial armor and light show for a time. In late 1999, Vince Russo and Ed Ferrara began booking WCW programs and Hayashi was paired with La Parka. During interviews, the two would speak in their native languages which would be humorously dubbed over by charismatic English speakers, calling him names such as "The Kaz Master" and "Kazanova". This ended shortly when La Parka became upset and tossed the microphone down as Ferrera was speaking.

For much of his early career, Hayashi wrestled in Michinoku Pro Wrestling (Michinoku Pro/MPW) under a mask, using the ring name Shiryu (Growing Dragon in Japanese). As Shiryu, he was part of the memorable rudo group, Kaientai Deluxe, which waged war with Michinoku Pro's Sekigun for many years, producing some classic matches. In June 1997, he left Michinoku Pro for the Mexican Promo Azteca promotion, before joining World Championship Wrestling (WCW) in the United States in October of that year.

Kazuhiro Hayashi (林 和広 , Hayashi Kazuhiro, born May 18, 1973) is a Japanese professional wrestler known simply as Kaz Hayashi (カズ・ハヤシ , Kazu Hayashi) . He is best known for his work in All Japan Pro Wrestling (AJPW), where in addition to being a wrestler for the promotion, he also served as the head booker for the company's junior heavyweight division. After leaving AJPW in 2013, Hayashi competed for Wrestle-1, where he also worked as a trainer. In April 2017, Hayashi took over as the new president of Wrestle-1, remaining in the position until the promotion's closure in 2020; he was also the promotion's final champion of the Wrestle-1 Championship.