【Designated by the City：Historic Site】Abu-ga No. 2

Abu-ga No. 2 is located by the road east of Abuga No. 1, which is about 450 m north of the midpoint of Farm Road 78 in Nagayama, south of Irabu Island. It is about 11.5 m deep and the space at the bottom is 10 m wide and 20 m long. There is a stairway at the northeastern side of the lower part, giving easy access to the bottom space. The floor is almost flat and covered with concrete around the steps. There can be seen icicle-shaped stones about 4 m in length around the northwestern side of the room.
Secondary products have developed there with a substantial amount of sediment of soil and vegetation. On the western side (the road side) of the space, there is a semicircular trace of corrosion at the mouth. Below it, there is a small rise, a mixture of soil and rocks scattered unnaturally as if they had caved in.