洲ノ埼海軍航空隊の会計課が疎開したという建物。事務所として使用したのか。 大網防空砲台は千葉県館山市にあった旧海軍砲台。4門の高射砲などがおかれていたという。 凹地や塹壕、コンクリート製の洞窟式弾薬庫などが残されており、廃車が放置されているものもある。 また南条へ下る途中に、終戦まぎわに疎開してきた洲ノ埼海軍航空隊の主計科（会計課）の建物が残っている。
Building that Sauno Saito Army Air Corps' accounting section evacuated. Did you use it as an office? Oei Air Defense Battery was the former Navy Battery which was in Tateyama-shi, Chiba Prefecture. It was said that four guns and other guns were placed. There are recesses, trenches, concrete cave-type ammunition cabinets, and some scrapped cars are left unattended. On the way down to Namjo, the building of the main school (Accounting Division) of the Susono Saito Army Air Corps, which has evacuated around the end of the war, remains.