PORSCHE RACING HISTORYKaoru Hoshino (J)
1988
3 March 1988 - Fuji 500 km - All Japan Sports Prototype Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 962 C | 962C-114 | LD-1 | Naoki Nagasaka (J)/Kaoru Hoshino (J)/Masahiko Kageyama (J) | Leyton House Racing Team (D) | DNF | 13th | 83 laps - Turbo Fire |
10 April 1988 - Suzuka 500 km - All Japan Sports Prototype Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 962 C | 962C-114 | C | Naoki Nagasaka (J)/Kaoru Hoshino (J)/Masahiko Kageyama (J) | Leyton House Racing Team (D) | DNF | 12th | 69 laps - Suspension |
1 May 1988 - Fuji 1000 km JSPC - All Japan Sports Prototype Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 962 C | 962C-114 | LD-1 | Naoki Nagasaka (J)/Kaoru Hoshino (J)/Masahiko Kageyama (J) | Leyton House Racing Team (D) | 4th | 4th | 9th | 221 laps |
24 July 1988 - Fuji 500 Miles - All Japan Sports Prototype Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 962 C | 962C-114 | LD-1 | Naoki Nagasaka (J)/Kaoru Hoshino (J)/Masahiko Kageyama (J) | Leyton House Racing Team (D) | 7th | 7th | 10th | 155 laps |
28 August 1988 - Suzuka 1000 km - All Japan Sports Prototype Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 962 C | 962C-114 | C | Kaoru Hoshino (J)/Masahiko Kageyama (J) | Leyton House Racing Team (D) | 6th | 6th | 13th | 166 laps |
9 October 1988 - Fuji 1000 km - World Sports-Prototype Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 28 | Porsche 962 C | 962C-114 | C1 | Naoki Nagasaka (J)/Kaoru Hoshino (J)/Masahiko Kageyama (J) | Leyton House Racing Team (D) | 8th | 8th | 22nd | 214 laps |