| Cyrus Ryuichi Tran 谷口 サイラス 龍一 | |
| Fullname: | Cyrus Ryuichi Taniguchi (谷口 サイラス 龍一) |
| Birth Date: | 4 October 1994 |
| Birth Place: | Honolulu, Hawaii, United States |
| Height: | 1.76 m[1] |
| Position: | Midfielder |
| Youthclubs1: | Meito Club |
| Youthyears2: | –2013 |
| Youthclubs2: | Machida Zelvia |
| Youthyears3: | 2013–2017 |
| Youthclubs3: | International Budo University |
| Years1: | 2017–2020 |
| Clubs1: | Paradise Soccer Club |
| Years2: | 2020–2021 |
| Clubs2: | FC Arizona |
| Years3: | 2021–2022 |
| Caps3: | 24 |
| Goals3: | 0 |
| Clubs3: | Michigan Stars |
| Years4: | 2023 |
| Caps4: | 18 |
| Goals4: | 6 |
| Clubs4: | Albion San Diego |
| Years5: | 2024 |
| Caps5: | 4 |
| Goals5: | 0 |
| Clubs5: | Becamex Binh Duong |
| Club-Update: | June 25, 2024 |
, also known as Cyrus Tran, is an American professional soccer player who last played for V.League 1 club Becamex Binh Duong.
Taniguchi was born in Honolulu, Hawaii to a Vietnamese father from Saigon and a Japanese mother. He moved to Japan with his family when he was 6 years old. He joined the youth academy of Machida Zelvia and played there until 2013. He then attended the International Budo University.[2]
He started his senior career playing for NPSL side FC Arizona before signing for National Independent Soccer Association clubs Michigan Stars and then Albion San Diego.[3]
In March 2024, Taniguchi joined Vietnamese club Becamex Binh Duong as a free agent.[4] [5] On 31 March 2024, Taniguchi made his professional with Becamex Binh Duong in the V.League 1, coming in as a substitute in his team's 0–2 away defeat against Hong Linh Ha Tinh.[6]