Idaten (いだてん、韋駄天) was apparently a really fast deity in the Indian pantheon, comparable perhaps to Mercury/Nike. It was the nickname given to Kanakuri Shisou (金栗四三), known as the father of the Japanese marathon.
Idaten is also the name of the current Taiga Drama (NHK, Sunday, 20:00 - 21:00), which took up his story beginning yesterday. Coincidentally, he is from Nagomi, Kumamoto, which suffered from an earthquake a few days previous. You’ll also recognize him as the logo of Glico products (see below, and his famous sign at Dotonbori in Osaka) and the origin of “KK” from “KK Wing.” His story is fascinating. You can read it here to anticipate the series. - William https://en.wikipedia.org/wiki/Shizo_Kanakuri