Nihan

Nihan is an island found in Weyard's Eastern Sea. It is themed to correspond with the real-world Japan.

In The Lost Age
In The Lost Age, though not named as such, Nihan is visited, and is home to Izumo and Gaia Rock (see those pages for details).

In Dark Dawn
After the Golden Sun event, Nihan was buffeted by an enormous tidal wave, destroying Izumo. The citizens relocated to Yamata, making it the isle's new largest settlement. Nearby islands have also risen up from the seafloor, making the island part of a somewhat large chain. Gaia Rock is no longer a visitable location, but it is mentioned by some of Yamata's citizens.

Niha's encyclopedia entry reads as follows:
 * "This eastern island was once home to the village of Izumo before it was flooded. The surviving villagers founded Yamata City. The dominant feature of the island was Mount Mikage (also called Gaia Rock), which was home to the Great Serpent."