| 1 | A | B | C | D | E | F |
| --- | --- | --- | --- | --- | --- | --- |
| 2 | Toshihiko Seko - Marathons |  |  |  |  |  |
| 3 | Year | Competition | Venue | Position | Event | Notes |
| 4 | 1978 | Fukuoka Marathon | Fukuoka, Japan | 1st | Marathon | 2:10:21 |
| 5 | 1979 | Fukuoka Marathon | Fukuoka, Japan | 1st | Marathon | 2:10:35 |
| 6 | 1979 | Boston Marathon | Boston, United States | 2nd | Marathon | 2:10:12 |
| 7 | 1980 | Fukuoka Marathon | Fukuoka, Japan | 1st | Marathon | 2:09:45 |
| 8 | 1981 | Boston Marathon | Boston, United States | 1st | Marathon | 2:09:26 |
| 9 | 1983 | Tokyo Marathon | Tokyo, Japan | 1st | Marathon | 2:08:38 |
| 10 | 1983 | Fukuoka Marathon | Fukuoka, Japan | 1st | Marathon | 2:08:52 |
| 11 | 1986 | London Marathon | London, United Kingdom | 1st | Marathon | 2:10:02 |
| 12 | 1986 | Chicago Marathon | Chicago, United States | 1st | Marathon | 2:08:27 |
| 13 | 1987 | Boston Marathon | Boston, United States | 1st | Marathon | 2:11:50 |
| 14 | 1988 | Lake Biwa Marathon | Ōtsu, Japan | 1st | Marathon | 2:12:41 |

Question: What are the marathon wins of Seko?
Answer: Seko's marathon wins include Fukuoka Marathon (1978–1980, 1983), Boston Marathon (1981, 1987), London Marathon (1986) and Chicago Marathon (1986).