Proper noun
Takamagahara
(mythology) A place in Japanese mythology, the dwelling-place of the kami, said to be connected to the Earth by a bridge.
In this myth when Amaterasu sends her grandson to earth to rule she gave him five rice grains, which had been grown in the fields of heaven ( Takamagahara ). Source: Internet
In Yamato, Nigihayahi no Mikoto, who also claim descent from the Takamagahara gods, was protected by Nagasunehiko. Source: Internet