IJA Radar

Discussions on all aspects of the Japanese Empire, from the capture of Taiwan until the end of the Second World War.
User avatar
fontessa
Member
Posts: 4489
Joined: 25 Mar 2011, 17:29
Location: Yokohama, Japan

Re: IJA Radar

#31

Post by fontessa » 21 Sep 2014, 06:45

Hello Wellgunde,
Wellgunde wrote: Have you read Mr. Hosaka's other books?
No, I have not.
Wellgunde wrote: Do you have a reference for lookout stations (types A through F) on Kyushu?
電波探信所・特設見張所等一覧 of the web page below shows special lookout stations under Sasebo Guard Unit.
http://www17.big.or.jp/~father/aab/sasebo/sasebo.html
By clicking 地名, you can see their types.
田島岳、宇久島、大瀬崎、女島、釣掛崎、野母崎: type “E”
松島、黒島番岳~長浦: type “D”

fontessa

User avatar
Wellgunde
Member
Posts: 1050
Joined: 24 Feb 2013, 09:02
Location: Poway, CA, USA

Re: IJA Radar

#32

Post by Wellgunde » 21 Sep 2014, 09:34

Fontessa, thank you, very much.
γνώθι σαυτόν


Mil-tech Bard
Member
Posts: 678
Joined: 06 Jan 2010, 16:50

Re: IJA Radar

#33

Post by Mil-tech Bard » 21 Sep 2014, 23:59

What is the document/page reference for the 32ndArmy radar photo below?

I take it that it is from No. 17 Okinawa from the Official Japanese history ?
fontessa wrote:Hello Mil-tech Bard,

I attached the radar coverage of the 32nd Army Radar Unit on 3 January, 1945.
It was scheduled to place a radar station at 沖大東島 (Okino Daito Jima).
There was no radar station at Kume Jima.
32FNr.jpg
fontessa

Mil-tech Bard
Member
Posts: 678
Joined: 06 Jan 2010, 16:50

Re: IJA Radar

#34

Post by Mil-tech Bard » 22 Sep 2014, 00:23

So, based upon this --
Okinawa Area Base Force Commander

- Ohshima Guard Unit Commander (Amami Ohshima Area)
---- Special Lookout Stations: 口永良部島 Kuchinoerabu Jima, 宝島 Takara Jima, Okinoerabu Jima

- The 43rd Minesweeper Division Commander (Okinawa Area)
---- Special Lookout Stations: Kume Jima, Miyako Jima, Ishigaki Jima, Yonakuni Jima

Okinawa Area Base Force HQ and the 32nd Army HQ exchanged radar information.
The Okinawa Area Base Force Commander had his radars under his 43rd Minesweeper Division Commander.

So, did either Okinawa Area Base Force HQ and the 32nd Army HQ send radar data or digested intelligence from those radars to the IJA Air Army/Divisions or IJN Air Fleets/Flotilla's?

User avatar
fontessa
Member
Posts: 4489
Joined: 25 Mar 2011, 17:29
Location: Yokohama, Japan

Re: IJA Radar

#35

Post by fontessa » 22 Sep 2014, 12:41

Hello Mil-tech Bard,
Mil-tech Bard wrote: What is the document/page reference for the 32ndArmy radar photo below?
I take it that it is from No. 17 Okinawa from the Official Japanese history ?
fontessa wrote:Hello Mil-tech Bard,
I attached the radar coverage of the 32nd Army Radar Unit on 3 January, 1945.
It was scheduled to place a radar station at 沖大東島 (Okino Daito Jima).
There was no radar station at Kume Jima.
32FNr.jpg
fontessa
It was from page 8 of JACAR C11110271700.
Mil-tech Bard wrote: The Okinawa Area Base Force Commander had his radars under his 43rd Minesweeper Division Commander.
The commander also had radars under Ohshima Guard Unit.
Mil-tech Bard wrote: So, did either Okinawa Area Base Force HQ and the 32nd Army HQ send radar data or digested intelligence from those radars to the IJA Air Army/Divisions or IJN Air Fleets/Flotilla's?
Yes I think so. To the 6th Air Army (in Kyushu), the 8th Air Division (in Taiwan) and the 5th Air Fleet (in Kyushu).

fontessa

Mil-tech Bard
Member
Posts: 678
Joined: 06 Jan 2010, 16:50

Re: IJA Radar

#36

Post by Mil-tech Bard » 22 Sep 2014, 19:39

>>JACAR C11110271700

This is a wartime doucment in the Japanese archives? Is there any other title to it?

>>Yes I think so. To the 6th Air Army (in Kyushu), the 8th Air Division (in Taiwan) and the 5th Air Fleet (in Kyushu).

I thought there was another IJN Air Fleet or Flotilla in Formosa/Taiwan in the Okinawa campaign.

Or did 5th Air Fleet have command of forces in both Kyushu and Formosa?

>>Ohshima Guard Unit Commander (Amami Ohshima Area)

I thought Amani Ohshima and Kikaiga Shima reported to Kyushu, and not Okinawa.


>>---- Special Lookout Stations: 宝島 Takara Jima

Is this a different island than the Tokuno Shima mentioned in American Okinawa Phase IIIe planning?

AFAIK, Tokuno Shima is to the south west of Amani Ohshima and your Takara Jima radar seems due north of Amani Ohshima.
Attachments
Kamikaze-Attacks-of-World-War-II -- Okinawa - Ryukus Map.jpg

User avatar
fontessa
Member
Posts: 4489
Joined: 25 Mar 2011, 17:29
Location: Yokohama, Japan

Re: IJA Radar

#37

Post by fontessa » 23 Sep 2014, 00:14

Hello Mil-tech Bard,
Mil-tech Bard wrote: >>JACAR C11110271700
This is a wartime document in the Japanese archives? Is there any other title to it?
It was the combat report of the 32nd Army Radar Unit.
Mil-tech Bard wrote: >>Yes I think so. To the 6th Air Army (in Kyushu), the 8th Air Division (in Taiwan) and the 5th Air Fleet (in Kyushu).
I thought there was another IJN Air Fleet or Flotilla in Formosa/Taiwan in the Okinawa campaign.
The 2nd Air Fleet in Taiwan was disbanded on 8 January, 1945.
Mil-tech Bard wrote: >>---- Special Lookout Stations: 宝島 Takara Jima
Is this a different island than the Tokuno Shima mentioned in American Okinawa Phase IIIe planning?
AFAIK, Tokuno Shima is to the south west of Amani Ohshima and your Takara Jima radar seems due north of Amani Ohshima.
Yes it was a different island.
宝島 is here.
Takarajima.jpg
fontessa

User avatar
fontessa
Member
Posts: 4489
Joined: 25 Mar 2011, 17:29
Location: Yokohama, Japan

Re: IJA Radar

#38

Post by fontessa » 23 Sep 2014, 09:45

Hello Mil-tech Bard,
.
Mil-tech Bard wrote: I thought Amani Ohshima and Kikaiga Shima reported to Kyushu, and not Okinawa
Ohshima Coast Defense Unit was subordinated to Sasebo Naval Distinct. But it was placed under the command of Okinawa Area Base Force Commander as 軍隊区分 (troop disposition). Please see page11 of JACAR C08030143900.

fontessa

Mil-tech Bard
Member
Posts: 678
Joined: 06 Jan 2010, 16:50

Re: IJA Radar

#39

Post by Mil-tech Bard » 23 Sep 2014, 17:09

JACAR C08030143900?

What is the document title?

User avatar
fontessa
Member
Posts: 4489
Joined: 25 Mar 2011, 17:29
Location: Yokohama, Japan

Re: IJA Radar

#40

Post by fontessa » 23 Sep 2014, 17:18

Hello Mil-tech Bard,

第四海上護衛隊、沖縄方面根拠地隊戦時日誌 戦時日誌
The 4th Escort Fleet, Okinawa Area Base Force Unit Wartime Diary

fontessa

User avatar
fontessa
Member
Posts: 4489
Joined: 25 Mar 2011, 17:29
Location: Yokohama, Japan

Re: IJA Radar

#41

Post by fontessa » 24 Sep 2014, 12:09

Hello Mil-tech Bard,

The below is the table based on page 11 of JACAR C08030143900.

In 特設見張所乙;
邊戸崎 is the typo of 邊戸岬.
喜武濱 is the typo of 喜屋武濱.
OkinawaBaseForce0.7.jpg
fontessa

Mil-tech Bard
Member
Posts: 678
Joined: 06 Jan 2010, 16:50

Re: IJA Radar

#42

Post by Mil-tech Bard » 30 Sep 2014, 20:32

>> 4th Escort Fleet, Okinawa Area Base Force Unit

So

1. Sasebo Naval Distinct had the Amani Ohshima base force under its command before Okinawa, and

2. Both the Okinawa Area Base Force and Amani Ohshima base force both reported to 4th Escort Fleet during the Okinawa campaign.

After Okinawa was over run, did Amani Ohshima base force get placed again under the control of the Sasebo Naval Distinct?

What was the 4th Escort Fleet's command relationship with the Sasebo Naval Distinct?

And who did the IJN radar stations at Miyako Jima, Ishigaki Jima, Yonakuni Jima report to? 4th Escort Fleet? Amani Ohshima base force? Someone else?

Mil-tech Bard
Member
Posts: 678
Joined: 06 Jan 2010, 16:50

Re: IJA Radar

#43

Post by Mil-tech Bard » 30 Sep 2014, 20:44

The US Army Intelligence Report No. 30 Northern Ryukus, dated 1 July 1946, reports the following regards Japanese radars --

Page 75

Anami-o-shima Two radars destroyed by Tenth Army Task Force in October 1945. There was an observation that the Kikia Jima radar was moved to Amani Oshima for orderly destruction.

Page 103 Tokuno

JNAF operated a Radar for the Army on the Island (30 men)

Page 106 Okino-erabu

Japanese radar station on Okino-erabu-shima w/ one warrent officer and six enlisted men. Located on the south west Coast facing china. It was damaged by American bombs in april 1945.


My research says, this Apr 1945 destruction date for the Okino-erabu radar is post war white wash. USMC radio countermeasures TBF's were picking up signals from Okino-erabu in June 1945.

Also, that the JNAF was operating an Army radar on Tokuno while a Army radar (Tachi-6) with a navt crew was on Kume Jima suggests a local deal between the General of 32nd Army and the Okinawa Base Force commander.

What is notable to me are the JNAF radars not mentioned as destroyed.

User avatar
Wellgunde
Member
Posts: 1050
Joined: 24 Feb 2013, 09:02
Location: Poway, CA, USA

Re: IJA Radar

#44

Post by Wellgunde » 01 Oct 2014, 21:23

Hello Mil-tech Bard,

The following link may provide you with some sources of which you might not be aware:

http://research.archives.gov/search?ren ... source=all
γνώθι σαυτόν

User avatar
fontessa
Member
Posts: 4489
Joined: 25 Mar 2011, 17:29
Location: Yokohama, Japan

Re: IJA Radar

#45

Post by fontessa » 02 Oct 2014, 12:38

Hello Mil-tech Bard,
Mil-tech Bard wrote: 1. Sasebo Naval Distinct had the Amani Ohshima base force under its command before Okinawa,
Yes I think so.
Mil-tech Bard wrote: 2. Both the Okinawa Area Base Force and Amani Ohshima base force both reported to 4th Escort Fleet during the Okinawa campaign.
I think there were two chains of command.
One was;
Sasebo Naval Distinct – Okinawa Area Base Force – 43rd Minesweeper Division and Ohshima Coast Defense Unit
The other was;
Sea Escort Fleet General Headquarters – 4th Escort Fleet
In early stage、 same commander commanded both Okinawa Area Base Force and 4th Escort Fleet.
Mil-tech Bard wrote: After Okinawa was over run, did Amani Ohshima base force get placed again under the control of the Sasebo Naval Distinct?
Yes I think so.
Mil-tech Bard wrote: What was the 4th Escort Fleet's command relationship with the Sasebo Naval Distinct?
I think there was no direct relationship between 4th Escort Fleet and Sasebo Naval Distindt.
Mil-tech Bard wrote: And who did the IJN radar stations at Miyako Jima, Ishigaki Jima, Yonakuni Jima report to? 4th Escort Fleet? Amani Ohshima base force? Someone else?
I think they reported to Okinawa Base Force via 43rd Minesweeper Division.

fontessa

Post Reply

Return to “Japan at War 1895-1945”