| Cho Sonjin | |
| Fullname: | Cho Sonjin |
| Kanji: | 趙善津 |
| Kana: | チョウソンジン |
| Hangul: | 조선진 |
| Hanja: | 趙善津 |
| Revisedromanization: | Jo Seon-jin |
| Mccunereischauer: | Cho Sŏn-chin |
| Birth Date: | 18 April 1970 |
| Birth Place: | South Korea |
| Residence: | Tokyo, Japan |
| Teacher: | Takeo Ando |
| Turnedpro: | 1984 |
| Rank: | 9 dan |
| Affiliation: | Nihon Ki-in |
Cho Sonjin (; born April 18, 1970) is a professional Go player.
Cho was born in South Korea, but moved to Japan at age 12 in order to become a professional. He accomplished his goal two years later in 1984. He was promoted to 9 dan in 1998. In 1999, he defeated Cho Chikun in the Honinbo, ending Chikun's 10-year run with the title.
| Title | Years Held | |
|---|---|---|
| Current | 5 | |
| Honinbo | 1999 | |
| NEC Cup | 2006 | |
| Agon Cup | 2000, 2001 | |
| Shinjin-O | 1991 | |
| Defunct | 1 | |
| Shin-Ei | 1991 | |
| Continental | 2 | |
| China-Japan Agon Cup | 2000, 2001 |
| Title | Years Lost | |
|---|---|---|
| Current | 4 | |
| Kisei | 2001 | |
| Honinbo | 2000 | |
| Tengen | 2002 | |
| Shinjin-O | 1995 | |
| International | 1 | |
| Samsung Cup | 1999 |