Japanese 20mm Cannon Blockhouse

Coordinates: 15°6′41″N 145°42′7″E / 15.11139°N 145.70194°E

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Japanese 20mm Cannon Blockhouse
U.S. National Register of Historic Places



Nearest city	Saipan, Northern Mariana Islands
Coordinates	15°6′41″N 145°42′7″E / 15.11139°N 145.70194°E / 15.11139; 145.70194
Area	less than one acre
Built	1944 (1944)
NRHP reference No.	95001048^[1]
Added to NRHP	August 25, 1995

The Japanese 20mm Cannon Blockhouse is one of many relics of World War II on the island of Saipan in the Northern Mariana Islands. It is a concrete blockhouse, semi-circular in shape with a diameter of about 6 metres (20 ft). Its walls are 1.22 metres (4.0 ft) thick with four firing ports large enough to accommodate 20mm cannons, originally equipped with steel sliding shutters. A steel door 25 millimetres (0.98 in) thick provides access to the structure at the rear, sheltered by a concrete wall and covered defensively by a machine gun port. The blockhouse is located near the center of what is locally called Big Agingan Beach (Unai Dankulo Agingan), on the south coast of the island, about 20 metres (66 ft) from the shore. It was built in some haste by the Japanese forces defending Saipan in 1944, and was captured by Allied forces early in the Battle of Saipan.^[2]

The blockhouse was listed on the National Register of Historic Places in 1995.^[1]

References

^ ^a ^b "National Register Information System". National Register of Historic Places. National Park Service. July 9, 2010.
^ "NRHP nomination for Japanese 20mm Cannon Blockhouse". National Park Service. Retrieved 2015-04-16.

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Saipan	Banzai Cliff Campaneyan Kristo Rai Chalan Galaide Hachiman Jinja Isley Field Japanese 20mm Cannon Blockhouse Japanese Hospital Japanese Jail Historic and Archeological District Japanese Lighthouse Landing Beaches; Aslito/Isely Field; & Marpi Point Laulau Kattan Latte Site Mañagaha Suicide Cliff (Laderan Banadero) Tachognya Unai Achugao Archaeological Site Unai Lagua Japanese Defense Pillbox Unai Obyan Latte Site Waherak Maihar
Rota	Chudang Palii Japanese WWII Defensive Complex Chugai' Pictograph Site Commissioner's Office Dugi Archeological Site Japanese Coastal Defense Gun Japanese Hospital Mochong Nanyo Kohatsu Kabushiki Kaisha Sugar Mill Rectory Rota Latte Stone Quarry
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Northern Islands	No listings
Rota	Chudang Palii Japanese World War II Defensive Complex Chugai' Pictograph Site Commissioner's Office Dugi Archeological Site Japanese Coastal Defense Gun Japanese Hospital (Rota) Mochong Nanyo Kohatsu Kabushiki Kaisha Sugar Mill Rectory Rota Latte Stone Quarry
Sapian	Banzai Cliff Brown Beach One Japanese Fortifications Campaneyan Kristo Rai Chalan Galaide Hachiman Jinja Isley Field Historic District Japanese 20mm Cannon Blockhouse Japanese Hospital (Saipan) Japanese Jail Historic and Archeological District Japanese Lighthouse Landing Beaches; Aslito/Isely Field; & Marpi Point, Saipan Island Laulau Kattan Latte Site Mañagaha Sabanetan Toro Latte Site Suicide Cliff Tachognya Unai Achugao Archaeological Site Unai Lagua Japanese Defense Pillbox Unai Obyan Latte Site Waherak Maihar
Tinian	House of Taga Nanyo Kohatsu Kabushiki Kaisha complex North Field Unai Dangkulo Petroglyph Site

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