| Keitaro Hoshino | |
| Weight: | minimumweight |
| Height: | 5 ft 2+1/2 in |
| Nationality: | Japanese |
| Birth Date: | 14 August 1969 |
| Birth Place: | Yokohama, Japan |
| Style: | Orthodox |
| Total: | 33 |
| Wins: | 23 |
| Ko: | 6 |
| Losses: | 10 |
Keitaro Hoshino (14 August 1969 – 9 October 2021[1]) was a Japanese boxer.
Hoshino turned pro in 1988 and captured the WBA minimumweight title with a decision win over Joma Gamboa in 2000. He defended the belt once before losing it by split decision to Chana Porpaoin in 2001. He recaptured the vacant WBA minimumweight title with a decision win over Gamboa in 2002, but lost the belt in his first defense to Noel Arambulet.
| Result | Record | Opponent | Type | Round, time | Date | Location | Notes | ||
|---|---|---|---|---|---|---|---|---|---|
| 33 | Loss | 23–10 |  José Antonio Aguirre | TKO | 12 (12), | 23 Jun 2003 |  | ||
| 32 | Loss | 23–9 |  Noel Arambulet | MD | 12 | 20 Dec 2002 | | ||
| 31 | Loss | 23–8 | Noel Arambulet | MD | 12 | 29 Jul 2002 | | ||
| 30 | Win | 23–7 | Joma Gamboa | UD | 12 | 29 Jan 2002 | | ||
| 29 | Win | 22–7 |  Prabpram Porpreecha | TKO | 10 (10), | 26 Sep 2001 | | ||
| 28 | Loss | 21–7 | Chana Porpaoin | 12 | 16 Apr 2001 | | |||
| 27 | Win | 21–6 | Joma Gamboa | UD | 12 | 6 Dec 2000 | | ||
| 26 | Win | 20–6 | Hiroshi Nakajima | UD | 10 | 30 May 2000 | | ||
| 25 | Win | 19–6 | Keisuke Yokoyama | UD | 10 | 1 Feb 2000 | | ||
| 24 | Win | 18–6 | Hiroshi Nakajima | UD | 10 | 5 Sep 1998 | | ||
| 23 | Win | 17–6 | Itsuo Oka | 10 | 26 May 1998 | | |||
| 22 | Win | 16–6 | Makoto Suzuki | TKO | 9 (10), | 24 Feb 1998 | | ||
| 21 | Win | 15–6 | Satoshi Yoshida | PTS | 10 | 5 Aug 1997 | | ||
| 20 | Win | 14–6 | Ernesto Rubillar | UD | 10 | 25 Feb 1997 | | ||
| 19 | Win | 13–6 | Keisuke Yokoyama | TKO | 8 (10) | 6 Aug 1996 | | ||
| 18 | Loss | 12–6 | Allan Butlig | KO | 2 | 21 Mar 1996 | | ||
| 17 | Win | 12–5 | Ernesto Rubillar | PTS | 10 | 23 Oct 1995 | | ||
| 16 | Win | 11–5 | David Franco | 10 | 17 Jul 1995 | | |||
| 15 | Win | 10–5 | Rolando Tadle | PTS | 10 | 17 Apr 1995 | | ||
| 14 | Win | 9–5 | Kimihiko Ide | KO | 1 | 23 Jan 1995 | | ||
| 13 | Win | 8–5 | Hiroyuki Kasuya | PTS | 8 | 28 Aug 1994 | | ||
| 12 | Win | 7–5 | Mitsunori Mori | TKO | 1 | 4 May 1994 | | ||
| 11 | Loss | 6–5 | Hiroki Sakakibara | TKO | 6 (6), | 22 Oct 1993 | | ||
| 10 | Win | 6–4 | Satoshi Yoshida | PTS | 5 | 3 Aug 1993 | | ||
| 9 | Loss | 5–4 | Katsuaki Eguchi | TKO | 4 | 22 Mar 1993 | | ||
| 8 | Loss | 5–3 | Masahide Makiyama | 3 (8), | 18 Jan 1993 | | |||
| 7 | Loss | 5–2 | Katsuaki Eguchi | PTS | 5 | 20 Jul 1992 | | ||
| 6 | Win | 5–1 | Takeshi Watanabe | PTS | 6 | 6 Jun 1992 | | ||
| 5 | Win | 4–1 | Hideo Suzuki | 3 | 16 Jan 1992 | | |||
| 4 | Win | 3–1 | Tetsuya Yoshitomi | PTS | 4 | 28 Oct 1991 | | ||
| 3 | Win | 2–1 | Abo Oguni | PTS | 4 | 22 Aug 1991 | | ||
| 2 | Win | 1–1 | Katsunori Takizawa | PTS | 4 | 13 Mar 1989 | | ||
| 1 | Loss | 0–1 | Naruhisa Nagayama | 4 | 3 Nov 1988 | |