It was the grand canal was the first built
The founder of Jains, Mahavira died at the age of 72. He attained omniscience under Sala tree on the banks of a river. The tradition believes his death occurred in 527 BC. His soul believed in all jain traditions to be abode of the liberated souls.
The fact that Japan is an island and has a large body of water in between them and the main land.
