Tenson kōrin

In Japanese mythology, the tenson kōrin (天孫降臨) is the descent of Amaterasu's grandson Ninigi-no-Mikoto from Heaven (Takamagahara) to Ashihara no Nakatsukuni; according to legend, the direct place of descent is at Takachiho-gawara in Japan. Following the tenson kōrin, Ninigi's son, Hoori, was born.

Three generations of Hyuga
After the Tenson Korin there were the Three Generations of Hyuga until Jimmu's Eastern Expedition when the Imperial House of Japan was founded.

Alternate tellings
In some versions of this story, more gods came down from heaven besides Ninigi-no-Mikoto.