Tsuyoshi Koyama

Tsuyoshi Koyama (小山 剛志) is a Japanese voice actor and singer affiliated with. He is credited for his role as Sports Maxx in the anime adaptation of JoJo's Bizarre Adventure: Stone Ocean.

He is also known for his roles as the Beast Mercenary in ', Vassago "PoH" Casals in ', Kamen Rider Odin in the ' series, Doc Louis in the ' and ' series, and Bang Shishigam in the ' series.

Biograhy
Tsuyoshi Koyama was born on October 4, 1967 in Japan's. He graduated from at the age of 24 and began work as a stage actor. He made his anime role debut as Phil Ackerman in .

In 2007 he made his debut as a singer with the self-written self-composed song "Sin Utawarerumono Theme", which is used in a radio drama based on the visual novel game  and reached 10th on the Daily Ranking chart. He has since worked on various songs for the  fighting game series.

On January 10, 2010 he began writing a blog titled Tsuyoshi Koyama's No Pain, No Life.

On Valentine's Day in 2012 he married Japanese pop singer-songwriter.

He started playing  as a student in high school and in December 2015 he became began playing it as a side job, participating in various programs and projects involving it. He produced his own mahjong competition called Mahjong Octagon where even celebrities compete alongside professionals. When he moved to in October 2016, Mahjong Octagon's operation was transferred to  in July 2021.