Japanese submarine Yu 1007

An unidentified Yu I-type submarine of the Yu 1001 subclass in Tateyama Bay on the coast of Japan in 1945.
History
Japan
Name	Yu 1007
Builder	Japan Steel Works , Hiroshima,  Japan
Fate	Surrendered August 1945 Sank in storm 1945 or 1946 Salvaged Scrapped January 1948
General characteristics Yu I type
Type	Transport submarine
Displacement	274 long tons (278 t) surfaced 346 long tons (352 t) submerged
Length	41.40 m (135 ft 10 in) overall
Beam	3.90 m (12 ft 10 in)
Draft	3.00 m (9 ft 10 in)
Propulsion	2 × Hesselman engines 298 kW (400 bhp) surfaced 56 kW (75 shp) submerged single shaft
Speed	10 knots (19 km/h; 12 mph) surfaced 4 knots (7.4 km/h; 4.6 mph) submerged
Range	1,500  nmi (2,800 km; 1,700 mi) at 8 knots (15 km/h; 9.2 mph) surfaced 32 nmi (59 km; 37 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	100 m (328 ft)
Capacity	24 tons freight or 40 troops
Complement	23
Armament	1 × Type 4 37 mm shipboard gun 2 × IJN Type 92 13 mm antiaircraft guns

Yu 1007 was an Imperial Japanese Army transport submarine of the Yu 1001 subclass of the Yu I type. Constructed for use during the latter stages of World War II, she served in the waters of the Japanese archipelago.

Construction

In the final two years of World War II, the Imperial Japanese Army constructed transport submarines — officially the Type 3 submergence transport vehicle and known to the Japanese Army as the Maru Yu — with which to supply its isolated island garrisons in the Pacific. Only submarines of the Yu I type were completed and saw service. The Yu I type was produced in four subclasses, each produced by a different manufacturer and differing primarily in the design of their conning towers and details of their gun armament, although one source ^[1] states that the Yu 1001 subclass differed from the original Yu 1 sublcass in other ways, being longer, having a slightly larger displacement and more powerful diesel engine that increased the maximum speed by 2 knots (3.7 km/h; 2.3 mph), and probably having no deck gun installed. None of the Yu I-type submarines carried torpedoes or had torpedo tubes. Yu 1007 a unit of the Yu 1001 subclass. ^[2]

Japan Steel Works (Nihon Seikojo) constructed Yu 1007 at its plant in Hiroshima, Japan. ^{[2] [3]} Records of the details of the construction of Yu 1007 have not been discovered, but the earliest Yu I-type submarines of the original Yu 1 subclass were laid down and launched during the latter half of 1943 and entered service at the end of 1943 or early in 1944. ^{[3] [4]}

Service history

Yu 1007 spent her operational career in Japanese home waters. ^[1] She was assigned to Detachment Kuchinotsu, Transport Submarine Group, on 15 May 1945,^{[ citation needed ]} and to Detachment Mikuriya in June 1945.^{[ citation needed ]} Surviving records of the activities of Imperial Japanese Army submarines are fragmentary, ^{[4] [5]} and no records have been discovered describing her specific activities in support of any particular operation. ^{[3] [1]}

World War II ended with the cessation of hostilities on 15 August 1945.Yu 1007 surrendered to the Allies later in August 1945. ^[3] She sank in a storm at Mikuriya either later in 1945 ^[3] or in 1946, ^[6] according to different sources. She subsequently was salvaged, and was scrapped by Kawanami at Nagasaki in January 1948. ^[6]

References

Footnotes

1. Mühlthaler, p. 330.
2. Mühlthaler, p. 329.
3. IJA Subs, ijnsubsite.com Accessed 14 May 2022
4. Mühlthaler, pp. 329–330.
5. Bailey, pp. 55–57, 63.
6. Bailey, p. 57.

Bibliography

• Bagnasco, Erminio (1977). Submarines of World War Two. Annapolis, Maryland: Naval Institute Press. ISBN   0-87021-962-6.
• Bailey, Mark L. (1998). "Imperial Japanese Army Transport Submarines: Details of the YU-2 Class Submarine YU-3". Warship International. XXXV (1): 55–63.
• Carpenter, Dorr B. & Polmar, Norman (1986). Submarines of the Imperial Japanese Navy 1904–1945. London: Conway Maritime Press. ISBN   0-85177-396-6.
• Chesneau, Roger, ed. (1980). Conway's All the World's Fighting Ships 1922–1946. Greenwich, UK: Conway Maritime Press. ISBN   0-85177-146-7.
• Mühlthaler, Erich (1998). "Re:Imperial Japanese Army Transport Submarines". Warship International. XXXV (4): 329–330. ISSN   0043-0374.
• Rekishi Gunzō, History of Pacific War Extra, Perfect guide, The submarines of the Imperial Japanese Forces, Gakken, Tokyo Japan, 2005, ISBN   4-05-603890-2.
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• Ships of the World No.506, Kaijinsha, Tokyo Japan, 1996.
• The Maru Special, Japanese Naval Vessels No.43 Japanese Submarines III, Ushio Shobō, Tokyo Japan, 1980.
• Atsumi Nakashima, Army Submarine Fleet, "The secret project !, The men challenged the deep sea", Shinjinbutsu Ōraisha, Tokyo Japan, 2006, ISBN   4-404-03413-X.
• 50 year history of the Japan Steel Works (first volume and second volume), Japan Steel Works, 1968.