The common mythology / Shiva and Ganesha,Hindu / Izanagi and Susanoo,Shinto

Ganesha is son of Shiva.
There was a conflict between the father and son.
Likewise,Japanese mythology of Shinto,KOJIKI has similar story.
But Kojiki's history is far older than Hindu's. 
(Reference The Kojiki index)

There was a conflict between Izanagi and Susanoo.

Shiva≒Izanagi

Ganesha(White elephant)≒Childfood of Susanoo