Although there are several stories about the territory of Tsukuyomi, who was instructed to rule the heavens together with Amaterasu Omikami, another story claims that Tsukuyomi was ordered to control the ebb and flow of the tide (which may stem from the idea that the moon controls the tides), thus suggesting that there are several stories about the birth of the three gods.
支配領域については、天照大神と並んで天を治めよと指示された話が幾つかある一方で、「滄海原の潮の八百重を治すべし」と命じられたという話もあり（これは月が潮汐を支配しているという発想からきたものらしい）、複数の三神生誕の話が並列している。