Yamato XO Name Found!

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ijnfleetadmiral
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Yamato XO Name Found!

#1

Post by ijnfleetadmiral » 08 Feb 2014, 11:53

The names of Yamato's XOs, save for that of final XO Capt. Nomura Jiro (50), have eluded me since I first started studying the IJN. I was never able to find anything on them...until now.

On another part of the same website I found the Toba COs, I discovered the name of Yamato's first XO. This person was none other than Captain Mayuzumi Haruo (47), who was later CO of Akitsushima and Tone. He was probably Equipping Officer at first (the date of his appointment to this position is still unknown), and - having been promoted Captain on 15 October 1941 - became Yamato's XO upon her commissioning on 16 December 1941. He was relieved of this post on 25 March 1942, when he was posted Chief Equipping Officer of Akitsushima.

And thus a piece of the puzzle has been filled in. The names and dates of assignment for the other XOs is still unknown, as is the exact date of Capt. Nomura's posting to Yamato, but hopefully time and more research will reveal these answers as well.

So the initial command structure for Yamato (as of 16 December 1941) now looks like this: (If anyone can fill in any blanks, please post the information.)

Yamato
Commanding Officer: Captain Takayanagi Gihachi (41)
Executive Officer: Captain Mayuzumi Haruo (47)
Chief Operations Officer: Cdr Izumi Fukujiro (50)
Chief Navigator: ???
Chief Engineer: ???
Chief Surgeon: ???
Chief Paymaster: ???
Chief Intelligence Officer: ???
Chief Damage Control Officer: ???
Chief Communications Officer: ???
Chief Air Officer: LtCdr Okuda Shigenobu (54)
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Re: Yamato XO Name Found!

#2

Post by marek O. » 08 Feb 2014, 17:46

Hello,
I have a name for You.
cpt. [since October 1944] Hayashi Shiro [51] - Chief Int Officer - that's all I got, so inteligence? intendance? No idea.

Regards,
Marek


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Re: Yamato XO Name Found!

#3

Post by ijnfleetadmiral » 09 Feb 2014, 07:35

Thanks, but Hayashi Shiro didn't come aboard Yamato until 28 October 1943, when he was posted Chief Operations Officer. Before he was posted to Yamato, he served as Chief Operations Officer of Nagato from 20 December 1942 - 28 October 1943. He was posted Chief Intelligence Officer of Yamato on 1 December 1943, and was promoted Captain on 15 October 1944. He remained aboard Yamato until she was sunk, and was among those KIA. He was promoted RADM posthumously.

I have a document from JACARS that apparently can fill in most of the personnel blanks I have for Yamato and Musashi (it's 50 pages long, so it probably has quite a few other ships in there as well), but it's entirely in Japanese and I have no way of translating it. I don't read the language myself (God, I wish I did! :) ), and while I know there's an app out there for one's smartphone that translates Japanese in the blink of an eye, I'm not one of those blessed enough to own a phone from 2010 or newer. If anyone can help in translating this, let me know. TIA for any help.
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Re: Yamato XO Name Found!

#4

Post by marek O. » 09 Feb 2014, 15:06

Dear sir,

Ooops. I don't have any explanation for my blunder. I haven't noticed time period You've set up. I'm sorry.

Regards,
Marek

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Re: Yamato XO Name Found!

#5

Post by ijnfleetadmiral » 09 Feb 2014, 17:30

No problem...it happens.
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Re: Yamato XO Name Found!

#6

Post by fontessa » 28 Jan 2015, 14:36

Hello ijnfleetadmiral,

On pages 12 ~ 14 of JACAR C13072083900 dated 19 January 1942, I found the names of the officers of YAMATO. I guess that the reason why the names of first officers were not announced was that existence of YAMATO had been top secret in those days.
At the same time I noticed that the description on the names of CO of Wikipedia is not correct.
http://ja.wikipedia.org/wiki/%E5%A4%A7% ... 6.E9.95.B7
ijnfleetadmiral wrote: So the initial command structure for Yamato (as of 16 December 1941) now looks like this: (If anyone can fill in any blanks, please post the information.)

Yamato
Commanding Officer: Captain Takayanagi Gihachi (41)
Executive Officer: Captain Mayuzumi Haruo (47)
Chief Operations Officer: Cdr Izumi Fukujiro (50)
Chief Navigator: ???
Chief Engineer: ???
Chief Surgeon: ???
Chief Paymaster: ???
Chief Intelligence Officer: ???
Chief Damage Control Officer: ???
Chief Communications Officer: ???
Chief Air Officer: LtCdr Okuda Shigenobu (54)
Commanding Officer:
艦長 Kancho
CAPT TAKAYANAGI Gihachi: appointed on 1 November 1941
CAPT MIYAZAKI Hidenori: appointed on 19 January 1942

Executive Officer:
副長 Fukucho
CDR KAJIWARA Sueyoshi: appointed on 10 October 1941
CDR MAYUZUMI Haruo: appointed on 19 January 1942

Chief Operations Officer:
運用長 Unyocho
CDR IZUMI Fukujiro: appointed on 26 November 1941
CDR MIYATA Eizo: appointed on 19 January 1942

Chief Navigator:
航海長 Kokaicho
CDR UEMURA Masao: appointed on 19 January 1942

Chief Engineer:
機関長 Kikancho
CDR KOYAMA Toshiaki: appointed on 19 January 1942

Chief Surgeon:
軍医長 Gun-icho
CDR KIMURA Yoshio: appointed on 5 September 1941

Chief Paymaster:
主計長 Shukeicho
CDR OWADA Tsutomu: appointed on 5 September 1941

Chief Intelligence Officer:
This post didn’t exist.

Chief Damage Control Officer:
See Unyocho.

Chief Communications Officer:
通信長 Tsushincho
CDR NOZAKI Torao: appointed on 19 January 1942

Chief Air Officer:
飛行長 HIkocho
LCDR OKUDA Shigenobu: appointed on 10 September 1941

Chief Gunnery Officer:
砲術長 Hojutsucho
CDR MATSUDA Gengo: appointed on 19 January 1942

Chief Secondary Guns Officer:
副砲長 Fukuhocho
LCDR NODA Tomoyuki: appointed on 19 January 1942

Chief AA Guns Officer:
高射長 Koshacho
LCDR YANAGA Tsuneto: appointed on 19 January 1942

Chief Mechanic Officer (?):
工作長 Kosakucho
CDR YAMAMOTO Ryozai: appointed on 10 September 1941

fontessa

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Re: Yamato XO Name Found!

#7

Post by ijnfleetadmiral » 29 Jan 2015, 05:26

Thanks! I imagine 18 January 1942 was the date she was declared operational...she was actually commissioned on 16 December 1941. Here's what I now have for her:

YAMATO
Commanding Officers
(CEO) - CAPT / RADM MIYAZATO Shutoku (40) - 5 September 1941 - 1 November 1941 (RADM on 15 October 1941.)
(CEO) - CAPT TAKAYANAGI Gihachi (41) - 1 November 1941 - 16 December 1941
CAPT / RADM TAKAYANAGI Gihachi (41) - 16 December 1941 - 17 December 1942 (RADM on 1 May 1942.)
CAPT / RADM MATSUDA Chiaki (44) - 17 December 1942 - 7 September 1943 (RADM on 1 May 1943.)
CAPT / RADM ONO Takeji (44) - 7 September 1943 - 25 January 1944 (RADM on 1 November 1943.)
CAPT / RADM MORISHITA Nobuei (45) - 25 January 1944 - 25 November 1944 (RADM on 15 October 1944.)
CAPT / VADM* ARUGA Kosaku (45) - 25 November 1944 - 7 April 1945 (KIA) (Posthumous 2-rank promotion.)

Executive Officers
(EO) - CDR MAYUZUMI Haruo (47) - 5 September 1941 - 15 October 1941
(EO) - CDR KAJIWARA Sueyoshi (47) - 15 October 1941 - 16 December 1941
CDR / CAPT KAJIWARA Sueyoshi (47) - 16 December 1941 - ???
CDR / CAPT NOMURA Jiro (50) - ??? - 7 April 1945 (CAPT on 15 October 1944.)

Chief Operations Officers
(EO) - CDR MIYATA Eizo (49) - 5 September 1941 - 26 November 1941
(EO) - CDR IZUMI Fukujiro (50) - 26 November 1941 - 16 December 1941
CDR IZUMI Fukujiro (50) - 16 December 1941 - 28 October 1943
CDR / CAPT / RADM* HAYASHI Shiro (51) - 28 October 1943 - 7 April 1945 (KIA) (CAPT on 15 October 1944.)

Chief Gunnery Officers
(EO) - CDR MATSUDA Gengo (49) - 5 September 1941 - 16 December 1941
CDR MATSUDA Gengo (49) - 16 December 1941 - ???
??? - ??? - 15 March 1944
CDR NOMURA Jiro (50) - 15 March 1944 - ???
CDR / CAPT NAKAGAWA Toshio (50) - ??? - November 1944 (CAPT on 15 October 1944.)
CAPT KURODA Yoshio (52) - November 1944 - 7 April 1945

Secondary Gunnery Officers
(EO) - LCDR NODA Tomoyuki (52) - ??? - 16 December 1941
LCDR NODA Tomoyuki (52) - 16 December 1941 - ???
??? - ??? - 1 March 1944
LT / LCDR FUKUI Toshinosuke (62) - 1 March 1944 - 1 December 1944 (LCDR on 15 October 1944.)
LCDR SHIMIZU Yoshihito (60) - 1 December 1944 - 7 April 1945

Tertiary Gunnery Officers
(EO) - LCDR IYANAGA Tsuneto (55) - ??? - 16 December 1941
LCDR IYANAGA Tsuneto (55) - 16 December 1941 - ???
LT / LCDR / CDR* KAWASAKI Katsumi (63) - ??? - 7 April 1945 (KIA) (LCDR on 15 October 1944.)

Chief Navigators
(EO) - CDR UEMURA Masao (??) - 5 September 1941 - 16 December 1941
CDR UEMURA Masao (??) - 16 December 1941 - ???
CDR / CAPT TSUDA Hiroaki (51) - ??? - ???
CDR / CAPT* SHIGEKI Shiro (53) - ??? - 7 April 1945 (KIA)

Chief Engineers
(EO) - (E) CDR KOYAMA Toshiaki (??) - ??? - 16 December 1941
(E) CDR KOYAMA Toshiaki (??) - 16 December 1941 - 15 September 1942
(E) CDR MATSUMOTO Masahiko (??) - 15 September 1942 - ???
CDR / CAPT / RADM* TAKAGI Tameyuki (Eng. 31) - ??? - 7 April 1945 (KIA) (CAPT on 15 October 1944.)

Chief Surgeons
(EO) - (S) CDR KIMURA Yoshio (??) - 5 September 1941 - 16 December 1941
(S) CDR KIMURA Yoshio (??) - 16 December 1941 - ???
??? - ??? - 7 April 1945

Chief Paymasters
(EO) - (P) CDR OWADA Tsutomu (??) - 5 September 1941 - 16 December 1941
(P) CDR OWADA Tsutomu (??) - 16 December 1941 - ???
??? - ??? - 7 April 1945

Chief Communications Officers
(EO) - CDR NOZAKI Torao (50) - 5 September 1941 - 16 December 1941
CDR NOZAKI Torao (50) - 16 December 1941 - ???
??? - ??? - 7 April 1945

Chief Damage Control Officers
(EO) - (E) CDR YAMAMOTO Ryozai (??) - 10 September 1941 - 16 December 1941
(E) CDR YAMAMOTO Ryozai (??) - 16 December 1941 - ???
CDR / CAPT* NAKAO Unekichi (??) - ??? - 7 April 1945 (KIA)

Chief Air Officers
(EO) - LCDR OKUDA Shigenobu (54) - 10 September 1941 - 16 December 1941
LCDR OKUDA Shigenobu (54) - 16 December 1941 - ???
??? - ??? - 7 April 1945
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Re: Yamato XO Name Found!

#8

Post by fontessa » 31 Jan 2015, 09:49

Hello ijnfleetadmiral,

I can fill in some blanks.
ijnfleetadmiral wrote: Chief Navigators
(EO) - CDR UEMURA Masao (??) - 5 September 1941 - 16 December 1941
CDR UEMURA Masao (??) - 16 December 1941 - ???
CDR / CAPT TSUDA Hiroaki (51) - ??? - ???
CDR / CAPT* SHIGEKI Shiro (53) - ??? - 7 April 1945 (KIA)
According to page 32 of JACAR C13072089700, CDR TSUDA Hiroaki was appointed on 16 February 1943.
ijnfleetadmiral wrote: Chief Engineers
(EO) - (E) CDR KOYAMA Toshiaki (??) - ??? - 16 December 1941
(E) CDR KOYAMA Toshiaki (??) - 16 December 1941 - 15 September 1942
(E) CDR MATSUMOTO Masahiko (??) - 15 September 1942 - ???
CDR / CAPT / RADM* TAKAGI Tameyuki (Eng. 31) - ??? - 7 April 1945 (KIA) (CAPT on 15 October 1944.)
According to page 49 of JACAR C13072092700, CDR NAKANE Ganjiro was appointed on 1 September 1943.
ijnfleetadmiral wrote: Chief Gunnery Officers
(EO) - CDR MATSUDA Gengo (49) - 5 September 1941 - 16 December 1941
CDR MATSUDA Gengo (49) - 16 December 1941 - ???
??? - ??? - 15 March 1944
CDR NOMURA Jiro (50) - 15 March 1944 - ???
CDR / CAPT NAKAGAWA Toshio (50) - ??? - November 1944 (CAPT on 15 October 1944.)
CAPT KURODA Yoshio (52) - November 1944 - 7 April 1945
According to page 23 of JACAR C13072089900, CDR NAKAWA Hisao(?) was appointed on 6 March 1943.
ijnfleetadmiral wrote: Secondary Gunnery Officers
(EO) - LCDR NODA Tomoyuki (52) - ??? - 16 December 1941
LCDR NODA Tomoyuki (52) - 16 December 1941 - ???
??? - ??? - 1 March 1944
LT / LCDR FUKUI Toshinosuke (62) - 1 March 1944 - 1 December 1944 (LCDR on 15 October 1944.)
LCDR SHIMIZU Yoshihito (60) - 1 December 1944 - 7 April 1945
According to page 42 of JACAR C13072091500 CDR NOGUCHI Yutaka was appointed on 7 June 1943. CDR NODA Tomoyuki was attached to Kure Naval Distinct on the same day.
According to page 21 of JACAR C13072093900, LCDR KAWASAKI Katsumi was appointed on 20 October 1943.
ijnfleetadmiral wrote: Tertiary Gunnery Officers
(EO) - LCDR IYANAGA Tsuneto (55) - ??? - 16 December 1941
LCDR IYANAGA Tsuneto (55) - 16 December 1941 - ???
LT / LCDR / CDR* KAWASAKI Katsumi (63) - ??? - 7 April 1945 (KIA) (LCDR on 15 October 1944.)
According to page 17 of JACAR C13072089400, LT UEMATSU Seitaro was appointed on 22 January 1943.
ijnfleetadmiral wrote: Chief Paymasters
(EO) - (P) CDR OWADA Tsutomu (??) - 5 September 1941 - 16 December 1941
(P) CDR OWADA Tsutomu (??) - 16 December 1941 - ???
??? - ??? - 7 April 1945
According to page 39 of JACAR C13072092300, CDR SHIMOIDA Mansaku was appointed on 2 August 1943.
ijnfleetadmiral wrote: Chief Air Officers
(EO) - LCDR OKUDA Shigenobu (54) - 10 September 1941 - 16 December 1941
LCDR OKUDA Shigenobu (54) - 16 December 1941 - ???
??? - ??? - 7 April 1945
According to page 17 of JACAR C13072089400, LT SAKUMA Takeshi was appointed on 22 January 1943.

fontessa

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Re: Yamato XO Name Found!

#9

Post by ijnfleetadmiral » 31 Jan 2015, 10:28

Thanks!
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Re: Yamato XO Name Found!

#10

Post by fontessa » 11 Apr 2015, 06:07

Hello ijnfleetadmiral,

I found XO NOMURA JIro.
ijnfleetadmiral wrote: YAMATO
Executive Officers
CDR / CAPT NOMURA Jiro (50) - ??? - 7 April 1945 (CAPT on 15 October 1944.)
Chief Gunnery Officers
CAPT KURODA Yoshio (52) - November 1944 - 7 April 1945
According to page 35 of JACAR C13072103800, CAPT NOMURA Jiro was appointed the XO on 10 March 1945.
According to page 35 of JACAR C13072103800, CDR KURODA Yoshio was appointed the Gunnery Officer on 10 March 1945.

fontessa

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Re: Yamato XO Name Found!

#11

Post by ijnfleetadmiral » 12 Apr 2015, 01:48

THANK YOU!!! I've been trying to find out when NOMURA was appointed for YEARS!
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Re: Yamato XO Name Found!

#12

Post by fontessa » 25 Apr 2015, 23:17

Hello ijnfleetadmiral,

After the operations Ten-Go, CAPT Nomuta Jiro was appointed the CO of 35th Assault Unit on 19 May. This unit was "suicide boats unit" which used Koryus, Kairyus, Kaitens and Shinyos.

http://www.jacar.go.jp/DAS/meta/image_C ... ence_code&

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Re: Yamato XO Name Found!

#13

Post by ijnfleetadmiral » 26 Apr 2015, 01:09

Is this the same as the 35th Guard Unit, or a completely different unit?
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Re: Yamato XO Name Found!

#14

Post by fontessa » 26 Apr 2015, 04:37

Hello ijnfleetadmiral,

It was completely different unit from the 35th Guard Unit. As I mentioned, it was a "suicide unit".

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Re: Yamato XO Name Found!

#15

Post by fontessa » 26 Apr 2015, 13:33

Hello ijnfleetadmiral,,
fontessa wrote: After the operations Ten-Go, CAPT Nomuta Jiro was appointed the CO of 35th Assault Unit on 19 May. This unit was "suicide boats unit" which used Koryus, Kairyus, Kaitens and Shinyos.
I checked Seinshi Sosho. The 35th Assault Unit consisted of following unis.
- 8th Kaiten Unit (12 Kaitens)
- 48th, 116th, 121st and 122nd Shinyo Units (125 Shiyos)

fontessa

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