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.
Ninigi-no-Mikoto (Japanese: 瓊瓊杵尊) is a deity in Japanese mythology. (-no-Mikoto here is an honorific title applied to the names of Japanese gods; Ninigi is the specific god's name.) Grandson of the sun goddess Amaterasu, Ninigi is regarded according to Japanese mythology as the great-grandfather of Japan’s first emperor, Emperor Jimmu. The three sacred treasures brought with Ninigi from Heaven and divine ancestry established the Japanese Imperial Family.
The three generations of kami starting with Ninigi are sometimes referred to as the three generations of Hyūga, they are said to represent a transitional period between the heavenly kami and the first emperor.