| Go Yokoyama | |
| Birth Name: | Tsuyoshi Yokoyama |
| Birth Date: | 29 June 1983 |
| Birth Place: | Hyōgo, Japan |
| Other Names: | Karate Prodigy |
| Nationality: |  Japanese |
| Weight: | 154lb |
| Weightclass: | Welterweight |
| Style: | Seidokaikan Karate, Shidokan Karate |
| Team: | Crazy Wolf |
| Yearsactive: | 2008-present |
| Kickboxingwins: | 9 |
| Kickboxingkowins: | 4 |
| Kickboxinglosses: | 1 |
| Kickboxingkolosses: | 1 |
| Kickboxingdraws: | 1 |
Tsuyoshi Yokoyama (born June 29, 1983), better known as is a Japanese kickboxer who competes in the welterweight division. He comes from a Seidokaikan karate background and is known for his unorthodox kicks.
Yamamoto began practicing karate at the age of 13. His brother Shingo Yokoyama is also a kickboxer. In 2003 he became the 5th All Japan Seidokaikan Lightweight Champion.
He made his professional kickboxing debut on August 16, 2008, when he defeated Marcelo Nascimento by a unanimous decision. In his following fight he made his debut in the K-1 promotion at 'the K-1 World MAX 2009 World Championship Tournament Final 8 and was knocked out by Jae Gil Noh. Following this he went on an eight fight unbeaten run consisting of seven wins and one draw. He returned to K-1 in a tournament reserve match at K-1 World MAX 2011 -70kg Japan Tournament Final on September 25, 2011. He defeated Yoshi via a unanimous decision.[1]
|-||Win|align=left| Yoshi|K-1 World MAX 2011 -70kg Japan Tournament Final|Osaka, Japan|Decision (unanimous)|3|3:00|9-1-1||-||Win|align=left| Kimuisaku|Gladiator 21|Japan|KO (left hook to the body)|1|2:27|8-1-1||-||Win|align=left| Yusuke Fukuda|HEAT 18|Osaka, Japan|Decision (Unanimous)|3|3:00|7-1-1||-||Win|align=left| Takeshi Yoshitsugu|ACCEL: Heavyweight Tournament Opening Round|Japan|KO (right hook)|2| -|6-1-1||-||style="background: #c5d2ea"|Draw|align=left| Kosuke Yamauchi|Sengoku: Soul of Fight|Tokyo, Japan|Decision draw|3|3:00|5-1-1||-||Win|align=left| Courage|Legend 1: Land of Fire|Japan|TKO|3|0:29|5-1||-||Win|align=left| Shingo Takayama|Gladiator 11|Japan|Decision (split)|3|3:00|4-1||-||Win|align=left||Gladiator 6|Japan|TKO (corner stoppage)|2|2:29|3-1||-||Win|align=left| Munjefun|Gladiator Okayama: Japan-Korea Friendship|Okayama, Japan|Decision (unanimous)|3|3:00|2-1||-||Loss|align=left|
Jae Gil Noh|K-1 World MAX 2009 World Championship Tournament Final 8|Tokyo, Japan|KO (straight right)|3|2:01|1-1||-||Win|align=left|
Marcelo Nascimento|Gladiator: Korea Friendship International Martial Arts Tournament|Japan|Decision (unanimous)|3|3:00|1-0||-|-| colspan=10 | Legend: