A two story building (betsuma or another building) is attached to the south-east corner of this building which is the south of the butsuma (room for Buddha statue) but it has been found that the two story building was built in the same year as the main building and was not an addition.
本建物東南隅すなわち仏間南に二階屋（別間）が接続しているが、この二階屋も後補のものではなく、本建物と同期のものであることがわかった。