Questions on the Japanese Kota Bharu Invasion Forces

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Fatboy Coxy
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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by Fatboy Coxy » 09 Jan 2024 10:20

Thank you Taki
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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by Fatboy Coxy » 09 Jan 2024 10:21

Hi all, anyone else know this one?

AP Miike Maru, 11,738 GRT
AP Toho Maru, 4,092 GRT
AP Zenyo Maru, 6,742 GRT

is it correct that they joined the convoys from Phu Quoc Island
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Akira Takizawa
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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by Akira Takizawa » 09 Jan 2024 12:11

They joined the convey shortly before the destination point G. So, I did not include them to the convoy. If include them, the convoy consisted of 25 ships.

Toho Maru is not AP, but AR.

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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by Fatboy Coxy » 09 Jan 2024 15:25

Hi Taki, fantastic map! I'm assuming the blue circles are airfields, although Patani and Kota Bharu airfields not marked. Tracks convoy route with time and day (minus X day or 8th December for this part of the world), other figures are Eastings and Northings?

There are two Toho Maru's, this is IJA and IJN has a 10,000 ton fleet replenishment oiler. What did Toho Maru (IJA) repair

Combinedfleet Toho Maru Trom, shows she left Saigon on the 5th December, and sailed round to Phu Quoc, where she waited, did Miike Maru and Zenyo Maru sail at the same time, and did IJN Escort Shimushu escort them round there at that time, see http://www.combinedfleet.com/TohoA_t.htm

Do you know the speed of these convoys once Saigon ships joined, would it be something like 12 knots, as Saigon ships couldn't do 18 knots like those from Samah.

Apologies for all these questions, but it interests me greatly.
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Akira Takizawa
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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by Akira Takizawa » 09 Jan 2024 16:04

> other figures are Eastings and Northings?

There is no explanation about these figures on the map. But, probably so.

> There are two Toho Maru's, this is IJA and IJN has a 10,000 ton fleet replenishment oiler. What did Toho Maru (IJA) repair

IJA Toho Maru has a 4,092 ton. Note that IJA Toho Maru is 東宝丸, but IJN Toho Maru is 東邦丸. They are different names in Kanji.

> Do you know the speed of these convoys once Saigon ships joined, would it be something like 12 knots, as Saigon ships couldn't do 18 knots like those from Samah.

14 knots in all travel.

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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by Fatboy Coxy » 10 Jan 2024 14:03

Thank you Taki, but did you mean all convoys travelled at 14 knots after the Saigon ships joined, or are you saying the Convoy from Samah sailed at 14 knots before Saigon ships joined?
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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by Akira Takizawa » 10 Jan 2024 15:34

From Samah to the destination point G.

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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by Fatboy Coxy » 11 Jan 2024 07:57

Thank you Taki.

Did the three ships,
AP Miike Maru, 11,738 GRT
AR Toho Maru, 4,092 GRT
AP Zenyo Maru, 6,742 GRT

land any air force troops at Phu Quoc, I know they carried a lot to Nakhon, Thailand

Was the Toho a repair ship for Air Force?
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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by Akira Takizawa » 11 Jan 2024 12:44

> Did the three ships,
AP Miike Maru, 11,738 GRT
AR Toho Maru, 4,092 GRT
AP Zenyo Maru, 6,742 GRT

land any air force troops at Phu Quoc.

No. Note that they did not anchored at Phu Quoc. They were waiting at sea near Phu Quoc.

> Was the Toho a repair ship for Air Force?

No. It belonged to 2nd Shipping Repair Depot.

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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by Fatboy Coxy » 11 Jan 2024 17:53

Thank you Taki, your answers have been very helpful
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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by Fatboy Coxy » 29 Mar 2024 09:44

Hi Guys, some more questions on the Kota Bharu landings. http://www.niehorster.org/014_japan/41- ... ru_01.html shows three large landing barges (Toku Daihatsu) and three armoured boats (Soukoutei), do we know which ship or ships carried these craft?
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fontessa
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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by fontessa » 29 Mar 2024 20:15

I remembered. I had a private discussion with Dr. Leo Niehorster who is the author of the cited web page in 2014, about "Initial Japanese Operations 1941–1942!" and at that time I showed him information from 戦史叢書 第1巻 マレー侵攻作戦 "Senshi Sosho Vol.1 Malayan Invasion Operation" shown below. According to this, The 14th Independent Engineer Regiment supported the landing at Kota Bharu. Daihatsu and others belonged to this regiment.
◇ Kota Bharu Landing Support
(From Senshi Sosho)
- The 14th Independent Engineer Regiment (Minus 2 companies) [Type "D"]
- The 49th Anchorage HQ
- The 106th Land Duty Company
- The 47th Sea Duty Company
- 1 Platoon, the 58th Construction Duty Company
- Part of Shipping Signal Regiment
- 24 Daihatsu, 21 Shohatsu and 3 special large landing barge
- 3 armored boat, 1 high speed boat and 1 liaison boat
The above belonged to the 14th Independent Engineer Regiment.

Additions
(1) Category [Type "D"] "丁 (Tei)" meant the specialty of the 14th Independent Engineer Regiment was 上陸 (舟艇機動)、海上輸送 Landing (Boat maneuver), Sea transport. Type "D" Independent Engineer Regiments were reorganized to 船舶工兵聯隊 Shipping Engineer Regiments later.
(2) Personnel from the 14th Independent Engineer Regiment provided landing support;
Headquarters, 3rd Company, 材料廠 Materials Depot, etc. 402 men
(3) One 高速艇 high-speed boat was used for reconnaissance etc.
(4) The carrying capacity of each boat varies depending on the situation at the time, but assuming carrying capacities were 特大発 large landing barge = 100 men, 大発 Daihatsu = 70 men, and 小発 Shohatsu = 30 men, about 2,000 men might have been carried at once, excluding the Daihatsu for transporting heavy weapons, ammunition, and collapsible boats. In other words, it was possible to transport the troops designated for the first wave of landings at once.

fonressa

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fontessa
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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by fontessa » 30 Mar 2024 18:10

Fatboy Coxy wrote:
29 Mar 2024 09:44
Hi Guys, some more questions on the Kota Bharu landings. http://www.niehorster.org/014_japan/41- ... ru_01.html shows three large landing barges (Toku Daihatsu) and three armoured boats (Soukoutei), do we know which ship or ships carried these craft?
Senshi Sosho has a boarding assignment of transports for landing troops, but not for landing craft. However, even in such cases, some things are recorded in the reminiscences of returnees.

侘美浩少将 Maj. Gen. Takumi Hiroshi
The 23rd Infantry Brigade Commander. He commanded the landing force 侘美支隊 Takumi Detachment during the Kota Bharu landing operation, which was the most difficult part of E Operation. After the war, he wrote the reminiscences コタバル敵前上陸 Landing in front of the enemy in Kota Baru. Below is the chart in his book which shows the Kota Bharu landing formation. "5" from Awajisan Maru means 3 装甲艇 Armored Boats, 1 高速艇 High-speed Boat, and 1 連絡艇 Liaison Boat. So the answer to your question is Awajisan Maru. Maj. Gen. Takumi boarded her.

侘美支隊乗船割当 Takumi Detachment Boarding Assignment of Transports
淡路山丸 Awajisan Maru
Takumi Detachment Commander Maj. Gen. Takumi Hiroshi
Infantry Brigade HQ
1st Battalion and 5th Company / 56th Infantry Regiment
Gunnery Company / 56th Infantry Regiment
1 Platoon of Division Engineer
Others
Total 1,653 men
綾戸山丸 Ayatosan Maru
56th Infantry Regiment Commander CAPT Nasu Yoshio
56th Infantry Regiment HQ
3rd Battalion / 56th Infantry Regiment
Rapid-firing Gun Company / 56th Infantry Regiment
1 Platoon of 12th Engineer Regiment
Others
Total 1,700 men
佐倉丸 Sakura Maru
2nd Battalion (minus 5th Company) / 56th Infantry Regiment
1 Platoon of 12th Engineer Regiment
Others
Total 2,150 men

コタバル敵前上陸.jpg
コタバル上陸.jpg

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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by Fatboy Coxy » 05 Apr 2024 09:14

Hi Fontessa, again thank you for the detailed reply and drawings, looking at the map and your notes, is the red highlighted 5 where the armoured boats were deployed?

Does it say how long much time between the first and second wave landings?
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Re: Questions on the Japanese Kota Bharu Invasion Forces

Post by fontessa » 05 Apr 2024 15:44

Fatboy Coxy wrote:
05 Apr 2024 09:14
Hi Fontessa, again thank you for the detailed reply and drawings, looking at the map and your notes, is the red highlighted 5 where the armoured boats were deployed?
Yes.
Fatboy Coxy wrote:
05 Apr 2024 09:14
Does it say how long much time between the first and second wave landings?
According to the reminiscences of Takumi, the 1st wave departed around 1:00AM and the 2nd wave around 2:30AM. 1st wave landed around 1:30AM, but he enemy's counterattack was so strong that they did not return until after 2 o'clock. Meanwhile, the 2nd wave soldiers waits on the landing craft. The launch of the 2nd wave was probably scheduled 2:00AM. It seems that the HQ aboard Awajisan Maru were very worried because they were supposed to return before 2:00Am.

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