Hatsutaka-class minelayer

Class overview
Hatsutaka in 1939
Name:	Hatsutaka-class minelayers Hatsutaka-class Wakataka-class Asadori-class (only a project)
Builders:	Harima Zōsen Corporation
Operators:	Imperial Japanese Navy Royal Malaysian Navy Republic of Singapore Navy
Preceded by:	Shirataka
Cost:	4,733,000 JPY (Hatsutaka) 4,900,000 JPY (Wakataka)
Built:	1938 – 1941
In commission:	1939 – 1946 (IJN)
Planned:	4
Completed:	3
Cancelled:	1
Lost:	2
Retired:	1
General characteristics
Type:	Minelayer/Netlayer
Displacement:	1,600 long tons (1,626 t) standard
Length:	91.00 m (298 ft 7 in) overall 86.50 m (283 ft 10 in) waterline
Beam:	11.30 m (37 ft 1 in)
Draught:	4.0 m (13 ft 1 in)
Propulsion:	2 × Kampon geared turbines 3 × Kampon coal/oil-fired boilers 2 shafts, 6,000 shp
Speed:	20.0 knots (23.0 mph; 37.0 km/h)
Range:	3,000 nmi (5,600 km) at 14 kn (16 mph; 26 km/h)
Complement:	Hatsutaka and Aotaka 199 Wakataka 202
Armament:	Hatsutaka, 1939 4 × 40 mm heavy machine guns 18 × Type 95 depth charges 1 × Type 94 depth charge projector 4 × depth charge throwers 1 × Type 93 active sonar 1 × Type 93 hydrophone 24 × Type 96 510 m (1,673 ft 3 in) anti-submarine nets or 100 × Type 93 naval mines Wakataka, 1941 2 × 76.2 mm (3.00 in) L/40 AA guns 4 × Type 93 13 mm AA guns 18 × Type 95 depth charges 1 × Type 94 depth charge projector 4 × depth charge throwers 1 × Type 93 active sonar 1 × Type 93 hydrophone 24 × Type 96 510 m (1,673 ft 3 in) anti-submarine nets or 100 × Type 93 naval mines

The Hatsutaka-class minelayer (初鷹型敷設艦,, Hatsutaka-gata Fusetsukan) was a class of minelayers of the Imperial Japanese Navy (IJN), serving during World War II. They have three sub classes, this article handles them collectively.

Design

The Hastutaka-class minelayer was reinforced model of the Shirataka. The Harima Zōsen Corporation dealt with all of the Hatsutaka-class.

Ships in classes

Hatsutaka-class

Project number was H12. First production model of the Hatsutaka-class. 2 vessels were built in 1938-40 under the Maru 3 Programme (Ship # 7 - 8). They were equipped with 4 × 40 mm quick-firing guns for anti-submarine warfare.

Ship #	Ship	Laid down	Launched	Completed	Fate
7	Hatsutaka (初鷹) ^[1]	29 March 1938	28 April 1939	31 October 1939	Sunk by USS Hawkbill at South China Sea 04°54′N 103°28′E / 4.900°N 103.467°E / 4.900; 103.467 on 16 May 1945.
8	Aotaka (蒼鷹) ^[2]	10 May 1939	3 February 1940	30 June 1940	Sunk by USS Pargo at north of Jesselton 07°00′N 116°00′E / 7.000°N 116.000°E / 7.000; 116.000 on 26 September 1944.

Wakataka-class

Project number was H12B. Second production model of the Hatsutaka-class. Only 1 vessel was built under the Maru 4 Programme (Ship # 102). She was equipped with 2 × 76.2 mm (3.00 in) anti-aircraft cannons. The Wakataka was classed in the Hatsutaka-class in the IJN official documents. The IJN called her the Modified Hatsutaka-class (改初鷹型,, Kai Hatsutaka-gata) unofficially.

Ship #	Ship	Laid down	Launched	Completed	Fate
102	Wakataka (若鷹) ^[3]	15 November 1940	12 July 1941	30 November 1941	Decommissioned on 1 March 1946. Surrendered to United Kingdom on 17 October 1947. Transferred to Federation of Malaya, and renamed Laburnum. Surrendered to Republic of Singapore in 1968. Later, nothing more was heard.

Asadori-class

Project number was H12C. The Navy Technical Department revised the Wakataka drawings. Only 1 vessel was planned under the Kai-Maru 5 Programme (Ship # 5039). The IJN called her the Modified Wakataka-class (改若鷹型,, Kai Wakataka-gata) unofficially.

Ship #	Ship	Laid down	Launched	Completed	Fate
5039	Asadori (朝鳥) ^[4]				Cancelled on 5 May 1944.

Photos

Aotaka in June 1940 at Harima Zōsen.
Wakataka as repatriation transport in Spring 1947 at Sasebo Naval Base.

Footnotes

↑ Free translation: Hawk in early fall.
↑ Blue hawk.
↑ Free translation: The 1 year old hawk.
↑ Free translation: Bird(s) Flying away from a nest in morning.

Bibliography

Ships of the World special issue Vol.47, Auxiliary Vessels of the Imperial Japanese Navy, "Kaijinsha". , (Japan), March 1997
Model Art Extra No.360, Drawings of Imperial Japanese Naval Vessels Part-2, "Model Art Co. Ltd.". (Japan), October 1989
The Maru Special, Japanese Naval Vessels No.42, Japanese minelayers, "Ushio Shobō". (Japan), August 1980
Daiji Katagiri, Ship Name Chronicles of the Imperial Japanese Navy Combined Fleet, Kōjinsha (Japan), June 1988, ISBN 4-7698-0386-9

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)^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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