Mitsuo Yoshida (吉田 光雄, Yoshida Mitsuo, born Kwak Gwang-ung (Korean: 곽광웅; Hanja: 郭光雄), December 3, 1951), better known by his ring name Riki Choshu (長州 力, Chōshū Riki), is a South Korean-Japanese retired professional wrestler who is best known for his longtime work in New Japan Pro-Wrestling (NJPW) as both a wrestler and a booker.

Choshu once again left NJPW in 2010 and primarily worked in Tatsumi Fujinami’s Dradition, as well as his own self-produced Power Hall events as a freelancer.

[5][6] In the 4th World League match, which he participated in when he returned to Japan, he finished third with Nikolai Volkoff, behind winner Seiji Sakaguchi and runner-up The Masked Superstar.

In late 1982, NJPW Chairman and booker Hisashi Shinma decided to have Choshu turn heel and create a new faction.

On October 28, 1982, Choshu became the first "traitor heel" in a Japanese promotion when he turned on Inoki and Fujinami in a six man tag match.

Choshu spent the rest of the year feuding with Fujinami while attracting additional supporters to his faction, then known as New Wolves.

Choshu was joined by Masa Saito, to provide a more senior rival for Antonio Inoki, along with Kuniaki Kobayashi and Gran Hamada, who would feud with Tiger Mask in the junior division.

On January 2, 1983, Killer Khan also turned heel on Fujinami in a tag team match to join the New Wolves.

The group continued to feud with NJPW for several months, with Choshu finally defeating Fujinami by count out on April 3, 1983 to win the International title.

Tenryu was second among AJPW's top Japanese stars, behind Jumbo Tsuruta, with Baba moving to more of an emeritus role.

Choshu defeated Tenryu by count out in 9:21 on February 21, 1985 in the main event of a JWP show that was not televised, but is available via bootleg tapes.

On June 21, 1985, AJPW held their first show at Budokan in almost ten years with Choshu challenging Tenryu for the United National titlein the semi-main event under Baba versus Rusher Kimura.

After NJPW split ties with Takeshi Kitano over the December 27 Sumo Hall riot, Choshu slowly climbed back up into the main event picture.

In June 1988, he won his first IWGP Tag Team Championship with Masa Saito, with whom he had also partnered during a brief stint in the American Wrestling Association (AWA).

[14] Choshu appears as a gang member in the 2017 video game Yakuza Kiwami 2, alongside Genichiro Tenryu, Keiji Mutoh, Masahiro Chono and Tatsumi Fujinami.