Hirotsugu with his father, after finishing a 100-km marathon.

All five members of the Yamaguchi family have a common pursuit: the marathon. Tadatoshi has a splendid record of having completed 100-kilometer marathons for 16 consecutive times. Encouraged by his father, Hirotsugu has also completed two 100-km marathons. Isn't it amazing? Hirotsugu continues to run every morning. The five have even entered the prefectural marathon together, so they're a bit famous in Saga Prefecture as a marathon family.

Hirotsugu, then a first grader, and his family make a pledge before the prefectural marathon.