| Kuni Yamagata's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Hardrock 100 2016 | California, US | 63 | Friday, July 15, 2016 | DNF |
| Hardrock 100 2015 | California, US | 62 | Friday, July 10, 2015 | 41:23:00.00 |
| Hardrock 100 2014 | California, US | 61 | Friday, July 11, 2014 | 44:12:19.00 |
| Hardrock 100 2013 | California, US | 60 | Friday, July 12, 2013 | 43:57:08.00 |