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Dungcas Beach Defense Guns

1942 establishments in Guam1942 establishments in the Japanese colonial empireBeaches of GuamBuildings and structures completed in 1942Buildings and structures on the National Register of Historic Places in Guam
Guam Registered Historic Place stubsGuamanian building and structure stubsHistoric districts in GuamHistoric districts on the National Register of Historic Places in GuamTamuning, GuamWorld War II on the National Register of Historic Places in Guam
One of two 20cm Japanese guns
One of two 20cm Japanese guns

The Dungcas Beach Defense Guns are an old World War II Japanese fortification in the United States territory of Guam. It consists of a tunnel dug in the coral limestone of the cliffs overlooking the beach on the northeast east side of Hagåtña Bay on the west side of the island. The tunnel has two guns mounted at openings facing the beach. This fortification was built by the 48th Independent Mixed Brigade of the 29th Division of the Imperial Japanese Army, during its occupation of the island 1941–44. The guns from this position were probably fired on landing Allied forces during the 1944 Battle of Guam, in which the United States retook the island. The guns at this fortification are Japanese short 20cm 12 cal. Model 3 Dual Purpose Naval Guns. The guns were removed from their original locations in 1992 to be treated for corrosion and to enable the development of the Onward Beach Resort. They were returned to fiberglass copies of the original emplacements and the tunnels were destroyed. Both guns are on display at the pool area of the Onward Beach Resort as of June 15, 2020. The fortification was listed on the National Register of Historic Places in 1976.

Excerpt from the Wikipedia article Dungcas Beach Defense Guns (License: CC BY-SA 3.0, Authors, Images).

Dungcas Beach Defense Guns
Tun Josen Mantanane Street,

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Latitude Longitude
N 13.490555555556 ° E 144.77277777778 °
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Tun Josen Mantanane Street

Tun Josen Mantanane Street
96911
Guam, United States
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One of two 20cm Japanese guns
One of two 20cm Japanese guns
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Nearby Places

Agana Historic District
Agana Historic District

The Agana Historic District in Hagåtña (formerly Agana), Guam is a 2-acre (0.81 ha) historic district that was listed on the U.S. National Register of Historic Places in 1985. It includes five contributing buildings: the Calvo-Torres, Rosario, Martinez-Notley, Lujan and Leon Guerrero houses. The area is roughly bounded by 2nd S., 3rd S., and 9th W., Santa Cruz and Legaspi Sts. in Agana. The Calvo-Torres and Martinez-Notley houses are the oldest surviving private residences in Guam. The set of structures are Guam's oldest concrete buildings. And the set is the only surviving group of pre-World War II houses in Agana, "the only fragment left of old Agana's urban space." While a few scattered other individual structures survive, all else has been destroyed by World War II, termites, typhoons Karen of 1962 and Pamela of 1976, and other causes. They are also significant for tie to the Spanish colonial era and the use of ifil wood prior to Guam's deforestation.: 3  The Calvo-Torres House is the oldest, with its oldest part dating about 1800. It is approximately 16.6 by 17.6 metres (54 ft × 58 ft) in plan, has ifil framing, and is roofed by original Spanish tile plus later metal roofing. The oldest part, built of manposteria (coral mixed with lime mortar), once hosted a silversmith. A kitchen was added, and, in the 1920s, a concrete addition. The Rosario House is believed to have been built in the late 1800s. It is a 8.8 by 11.3 metres (29 ft × 37 ft) south-facing "one-and-a-half bodega type" structure.: 6  Part of the Martinez-Notley House was built in 1826. William H. Notley married into the Martinez family. The house is 20.9 by 15.5 metres (69 ft × 51 ft). It is described as having massing and overall character with "strong Spanish overtones"; it is largely surrounded by manposteria walls.: 6–7  The Leon Guerrero House is a 17.7-by-12-metre (58 ft × 39 ft) house started in 1939 but halted by rumors of war, then used as barracks by Japanese personnel during the war, with storage of rice in its lower level. It would have been destroyed after the war but its owner, Leon Guerrero, refused to vacate.: 7  The Lujan House is separately listed on the National Register as Guam Institute.: 7