Seikoin (清光院), founded in 1650, is a Rinzai Zen temple in Shinagawa-ku, Tokyo. It is a 6-minute walk from Keikyu Line Shinbaba Station.
There are gravestones of two feudal clans' in the temple graveyard. There's a small stonge garden as well.
The Sanmon is the main gate.
The Hondo is the main building.
The Nagai clan was the feudal lord family who ruled the domain around modern-day Takatsuki City, Osaka Prefecture, in the Edo period. There stands 49 gravestones.
The Okudaira clan ruled the area around modern-day Nakatsu City, Oita Prefecture, in the Edo period. There stands 88 gravestones.