Mukashi Shinden

Mukashi Shinden (昔神殿, Japanese for Temple of the Ancients) is a small island located off the western coast of that can only be reached using a boat across the spiritual seas from the  or via, though the latter is rare as few even recall the existence of the island in the first place due to its secrecy. Before the massacre, the Yuengiri used the island as a spiritual retreat, and to this day the temple complex they created still holds some of their greatest treasures, secrets and achievements.

Overview
The island is of small size, with only two structures present. The first are the docks that once welcomed the Yuengiri when they sought to escape from the rigors of the, though the buildings there have been run down and abandoned for years, which was the case even before the massacre occurred. The second is the large, temple structure they built in the middle of the island to accommodate visitors; which to this day still hold the ancient archives of the Ancient Yuengiri, along with their greatest secrets and teachings. The island is mostly covered in lush forests with a multitude of rivers and creeks, with a single path leading from the docks towards the temple complex. As of now, only three people know of the islands existence, and they are Kenji Hiroshi and the old couple who continued to maintain and shelter the Yuengiri's artifacts since the massacre.