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