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Otori Class
Torpedo Boat

840 Tons (standard)
960 Tons (loaded)
290' 4" x 278 10" x 26' 10"
Armament Otori Class
3 x 12cm guns
1 x 40mm AA
1 x 11mm MG
3 x Type 94 Torpedo Tubes
3 x 6th Year Torpedoes
2 x Paravanes

Armament August 1944
2 x 12cm guns
11 x 25mm AA
3 x Type 94 Torpedo Tubes
3 x 6th Year Torpedoes
48 x depth charges

Ship History
Built by Tōkyō-Ishikawajima Shipbuilding Yard. Launched October 25, 1935. Completed December 20, 1936. Delivered to the Imperial Japanese Navy (IJN), Second China Expeditionary Fleet, 15th Escort Squadron.

Wartime History
On December 4, 1941 departs Mako as part of the invasion force arriving off Hong Kong on December 8, 1941 at the start of the Pacific War. During December 1941 until August 1942 Hiyodori conducts patrol and escort duties around Hong Kong.

During March 3-27, 1942 repaired at Hong Kong. On April 10, 1942 the 15th Escort Squadron deactivated; reassigned directly to Second China Expeditionary Fleet. On September 15, 1942 departs Hong Kong escorting a convoy bound for Palau and returns to Hong Kong on September 25, 1942.

On September 26, 1942 departs Hong Kong escorting a convoy via Palau to Rabaul then to Shortlands. On November 6, 1942 escorts a troop convoy from Rabaul to Shortlands then returns to Rabaul by November 8, 1942.

On November 21, 1942 departs Rabaul along with Otori transporting food for an emergency transport run bound for Lae. On November 22, 1942 the vessels are spotted by two B-17s and incorrectly identified them as destroyers roughly 68 miles southwest of Arawe and attacked. The B-17s made a first unsucessful attack then circled for a second run when B-17E 41-2536 was hit by anti-aircraft fire and crashed into the sea with at least six of the crew bailing out. Hiyodori rescues one of the crew and survives the attack undamaged. Afterwards, Hiyodori and Otori reach Lae, unload their and return to Rabaul on November 24, 1942.

The Naval Land Unit That Vanished In The Jungle by Tetsuo Watanabe adds:
"Hiyodori was on a sortie from Rabaul to Lae, whose crew were in high moral and said 'Soon we will show you a real man's war'. Their mission was not without incident, as a bombing attack by B-17's that dropped bombs and circled around to strafe. Tetsuo's jaw was wounded from a piece of shrapnel from a nearby blast, but was consoled by the sight of a B-17 falling with its wing on fire. In a unique turn of events, their ship picked up one of the Australian crew members who survived the crash, and the author remembers "He caught a look at my face bandaged except for my eyes, then he looked away" [likely, this was Australian Allan G. Fairfax]

On December 24, 1942 departs Rabaul escorting a convoy bound for Palau and returns to Rabaul on January 7, 1943. On January 16, 1942 escorts Yamashimo Maru transporting an anti-aircraft unit to Kolombangara. On January 17, 1943 escorts Tsugaru transporting an anti-aircraft unit to Rekata Bay.

22 January:
With KUROSHIO, escorted TSUGARU on troop transport run to Rekata.

On January 22, 1943 during the evening departed Rabaul escorting Toa Maru No. 2 on a supply run bound for Bougainville, Shortland, Kolombangara and Munda. Also escorting was subchaser CH-23 and mine layer Kamome. After departing Rabaul, the convoy was spotted by a Allied coastwatcher on New Ireland and reported by radio to the Allies.

16 February:
With Subchaser No. 18, sank USS AMBERJACK (SS-219) off New Britain.

31 March-3 April:
Steamed from Rabaul to Truk.

1 April:
Reassigned to 2nd Surface Escort Division, Fourth Fleet.

14-21 April:
Steamed from Truk to Yokosuka..

26 April:
Departed Yokosuka, then Saipan-Truk-Rabaul convoy escort operations.

8-15 May:
Escorted Convoy 4508 from Truk to Yokosuka. On 10 May assisted and rescued survivors of torpedoed transports KINAI MARU and TATSUTAKE MARU

17-21 July:
Escorted Convoy 1172 from Truk to Rabaul.

1-23 November:
Escorted convoy from Kwajalein via Truk to Sasebo.

15 November:
2nd Surface Escort Division reassigned to General Escort Command.

30 November-18 December:
Docked at Maizuru for repairs.

9-22 January 1944:
Escorted convoy from Yokosuka via Chichi-jima to Truk.

25 January-5 February:
Escorted convoy from Truk to Yokosuka, then Yokosuka-Saipan convoy escort duties.

3 March:
Minor damage: (cause unknown) at Saipan.

19-30 March:
Docked at Yokosuka for repairs.

1-23 April:
Escorted troop convoy Matsu No. 4 from Yokosuka to Saipan and back.

1-9 June:
Escorted convoy from Saipan to Truk.

21 June-13 July:
Escorted convoys from Truk via Davao and Cebu to Manila.

18 July:
Reassigned to 1st Surface Escort Division, General Escort Command.

24 July-3 August:
Escorted convoys from Manila via Takao to Sasebo.

5-7 August:
Docked at Sasebo for repairs.

15 August-22 September:
Escorted convoys from Sasebo via Keelung and Takao to Singapore.

2-9 October:
Escorted convoy from Singapore to Manila.

17-25 October:
Escorted convoy from Manila to Brunei. On 24 October assisted NAGANAMI in inspecting abandoned USS DARTER (SS-227).

On October 27, 1944 departs Brunei escorting a convoy traveling via Miri to Cape Saint Jacques arriving on November 5, 1944.

On November 10, 1944 departs Cape Saint Jacques escorting "Convoy MI-20" bound for Tako.

Sinking History
On November 17, 1944 while the convoy is in the South China Sea, Hiyodori is spotted by USS Gunnel SS-253 and torpedoed roughly 140 miles ENE of Cape Tourane at roughly Lat 16-56N Long 110-30E. Officially removed from the Navy list on January 10, 1945.

Combined Fleet - IJN Hiyodori: Tabular Record of Movement
The Naval Land Unit That Vanished In The Jungle mentions Rabaul to Lae supply run November 21-24, 1942

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Last Updated
November 16, 2018


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