三崎砲台（岩堂山観測所）は神奈川県三浦市にあった旧軍施設。 東京湾要塞の一部として大正10年竣工。七年式30cm長榴弾砲4門備えたが、 大正12年関東大震災により損傷補修。昭和13年に七年式30cm長榴弾砲4門とも満州に移され、昭和14年廃止。 岩堂山山頂に観測所跡が残る。 砲台跡はほとんど破壊されたが、また北東1kmほどの地点に一部遺構が見られる。
Misaki Battery (Iwadeido Observatories) was an old military facility located in Miura City, Kanagawa Prefecture. Completed in Taisho 10 years as part of Tokyo Bay Fortress. It was equipped with four seven-year 30 cm long-howitzer guns, but repaired damage due to the Great Kanto Earthquake in Taisho 12 years. In 1964, both seven year 30 cm long-howitzer guns were transferred to Manchuria, and they were abolished in Showa 14. Observatory sites remained at the summit of Iwodozan. Although the rupture trace was almost destroyed, there are some remains at about 1 km northeast.