Natsushima-class minelayer (1933)

Class overview
Natsushima in 1933.
Name:	Natsushima-class minelayer
Builders:	Tōkyō Ishikawajima Zōsen Corporation Harima Zōsen Corporation Mitsubishi Heavy Industries
Operators:	Imperial Japanese Navy
Preceded by:	Tsubame-class
Succeeded by:	Sokuten-class
Subclasses:	Natsushima-class Sarushima-class
Built:	1931–1934
In commission:	1933–1944
Planned:	3
Completed:	3
Lost:	3
General characteristics Natsushima-class
Type:	Netlayer/Minelayer
Displacement:	475.8 long tons (483 t) standard
Length:	73.00 m (239 ft 6 in) overall
Beam:	7.50 m (24 ft 7 in)
Draught:	1.95 m (6 ft 5 in)
Propulsion:	2 × triple expansion stages reciprocating engines 2 × Kampon mix-fired boilers 2 shafts, 2,300 shp
Speed:	19.0 knots (21.9 mph; 35.2 km/h)
Range:	2,500 nmi (4,600 km) at 14 kn (16 mph; 26 km/h)
Complement:	74
Armament:	2 × 76.2 mm (3.00 in) L/40 AA guns 1 × 13 mm AA guns 120 × Type 89 naval mines or 18 × depth charges or 1 × Type 14 510 m anti-submarine net
General characteristics Sarushima-class
Type:	Netlayer/Minelayer
Displacement:	566 long tons (575 t) standard
Length:	73.00 m (239 ft 6 in) overall
Beam:	7.49 m (24 ft 7 in)
Draught:	2.02 m (6 ft 8 in)
Propulsion:	2 × MAN Mk.2 Model 9 diesels, 2 shafts, 2,100 bhp
Speed:	18.0 knots (20.7 mph; 33.3 km/h)
Range:	4,639 nmi (8,591 km) at 14.4 kn (16.6 mph; 26.7 km/h)
Complement:	64
Armament:	same as Natsushima-class

The Natsushima-class minelayer (夏島型敷設艇,, Natsushima-gata Fusetsutei) was a class of minelayers of the Imperial Japanese Navy (IJN), serving during and after the 1930s through World War II. Their design was based on the Tsubame-class, but with increased armament.

Ships in class

Natsushima-class

Project number H5. 3 vessels were planned under the Maru 1 Programme, however, 3rd ship Sarushima was used to diesel engine experiment ship.

Natsushima (夏島)

24 December 1931: Laid down at Tōkyō Ishikawajima Zōsen.
24 March 1933: Launched.
31 July 1933: Completed.
In 1934: Rebuilding after the Tomozuru Incident.
In 1938: Sortie for the Second Sino-Japanese War.
1941-1943: Sortie for the naval mine laying at Japan Mainland.
10 December 1943: Dispatched to southeast area.
22 February 1944: Sunk by USS Stanly, USS Charles Ausburne and USS Dyson off Kavieng 02°40′S 149°40′E / 2.667°S 149.667°E / -2.667; 149.667.
30 April 1944: Removed from naval ship list.

Nasami (那沙美)

19 January 1933: Laid down at Harima Zōsen.
26 March 1934: Launched.
20 September 1934: Completed.
In 1938: Sortie for the Second Sino-Japanese War.
1941-1943: Sortie for the naval mine laying at Japan Mainland and convoy escort operations at East China Sea.
31 December 1943: Dispatched to southeast area.
1 April 1944: Sunk by air raid at Rabaul.
10 April 1944: Removed from naval ship list.

Sarushima-class

Project number H5B. She was built as diesel engine experiment ship. Her results were made use of in the Sokuten-class.

Sarushima (猿島)

28 March 1933: Laid down at Mistubishi, Yokohama shipyard.
16 December 1933: Launched.
20 July 1934: Completed.
In 1938: Sortie for the Second Sino-Japanese War.
1941-1944: Sortie for the naval mine laying and convoy escort operations at Japan Mainland.
4 July 1944: Sunk by air raid off Otōto-jima.
10 September 1944: Removed from naval ship list.

Photos

Nasami in 1934.
Sarushima in 1942.

Bibliography

Ships of the World special issue Vol.45, "Escort Vessels of the Imperial Japanese Navy", "Kaijinsha". , (Tokyo, Japan), 1996.
The Maru Special, Japanese Naval Vessels No.47, "Japanese naval mine warfare crafts", "Ushio Shobō". (Tokyo, Japan), 1981.

Japanese auxiliary ship classes of World War II

Colliers and oilers	Notoro Ondo Sunosaki Ashizuri Kazahaya^S Hayasui^S Hario^S Muroto Teiyō Maru^S Ōse (ex-Dutch tanker Genota)^SC

Food supply ships	Mamiya^S Nosaki^S Kinesaki Irako^S Kurasaki^SC

Landing ships	No.1 No.101 Shinshū Maru^S (Army) SS (Army)

Armed merchant cruisers	Aikoku Maru^S Kongō Maru^S Noshiro Maru^S

Minelayers and cable layer	Tokiwa^SC Itsukushima^S Yaeyama^S Okinoshima^S Tsugaru^S Minoo^SC Shirataka^S Hatsutaka Tsubame Natsushima (1933) Sokuten (1938) Hirashima Ajiro^S Kamishima Hashima Sokuten (1913) Aux. No.1 Aux. No.101 (ex-HMS Barlight)^SC

Minesweepers	No.1 (1923) No.5 (1928) No.13 No.17 No.7 (1938) No.19 No.101 (ex-HMS Taitam and HMS Waglan)^C Aux. No.1 Aux. No.101 (ex-HNLMS DEFG-class) Aux. No.104 (ex-HNLMS DEFG-class)

Patrol boats	No.1^C No.31^C No.46^SC No.101 (ex-HMS Thracian)^SC No.102 (ex-USS Stewart)^SC No.103 (ex-USS Finch)^SC No.104 (ex-Dutch East Indies Valk and Arend)^C No.105 (ex-Philippine customs Arayat)^SC No.106 (ex-HNLMS Banckert (1929))^SCI No.107 (ex-USS Genesee)^SC No.109 (ex-Dutch East Indies Fazant)^SC Aux. No.1

Repair ships	Asahi^SC Akashi^S Hayase (ex-Chinese passenger Chin Kiang)^SC Hitonose (ex-ROCN Min Sheng)^SC

Seaplane tenders	Notoro Kamoi^SC Chitose Mizuho^S Nisshin^S Akitsushima^S Kamikawa Maru

Submarine chasers	No.1 No.3^S No.4 No.13 No.28 No.60 Aux. No.1 Aux. No.101 (ex-HNLMS Tjerimai)^SC Aux. No.102 (ex-HNLMS Ardjoeno class)^C Aux. No.103 (ex-HNLMS B1 class)^C Aux. No.111 (ex-HNLMS P13 or P14)^SC Aux. No.112 (ex-HNLMS A class)^C Aux. No.117 (ex-HNLMS Bantam)^C Aux. No.251 Aux. No.253^S

Submarine tenders	Komahashi^SC Jingei Taigei^S

Survey ships	Tsukushi^S Katsuriki^SC Hakusa (ex-China customs Fu Hsing)^SC

Target ships	Settsu^SC Yakaze^SC Hakachi^S Ōhama^S

Training ships	Fuji^SC Shikishima^SC Asama^SC Azuma^SC Kasuga^SC Atada (ex-ROCN Yat Sen)^SC

Others	Sōya (freighter)^SC Kashino (turret transporter)^S Ōtomari (icebreaker)^S Tategami (salvage tug) Kasashima (salvage tug) Miura (salvage tug) Kaiyō No.1 (oceanographic research ship) Asuka (traffic ship, ex-ROCN Yung Chien)^SC

S Single ship of class C Converted to ship type I Incomplete until the end of war

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