Japanese Maritime Self Defense Force Thread

[Redlands18]

I couldn’t pass this by, it gives a real perspective re “armour” defences in naval ships of the first half of the 20th century
This 26” thick armour has been breached by a 16* shell!

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Got no idea where that armour comes from but it's certainly not a Yamato, no US Battleship ever fired on a Yamato, both were sunk by carrier aircraft.

 

[wild_Willie2]

This was most likely a piece of extra / spare / R&D armor used during testing in Japan before being captured by the US after the Japanese surrender. But this is most likely just a very close range (50 meter?) and 90 degrees hit by a 16 inch shell on this piece of armor so this does not prove much for practical penetration. This sort of data is only useful if you have comparative data under similar test conditions.

I had some time to look this picture up and this short video explains the what and why of this piece of armor.

Artifact Spotlight: Yamato Armor

Join the Naval History and Heritage Command as we Spotlight interesting and unique artifacts from the collection of the U.S. Navy. This 26" thick section of armor plate, meant for a Japanese Yamato class battleship, was found at the Kure Naval Base in Japan after the end of WWII and brought back...

www.dvidshub.net

 

[Redlands18]

This was most likely a piece of extra / spare / R&D armor used during testing in Japan before being captured by the US after the Japanese surrender. But this is most likely just a very close range (50 meter?) and 90 degrees hit by a 16 inch shell on this piece of armor so this does not prove much for practical penetration. This sort of data is only useful if you have comparative data under similar test conditions.

I had some time to look this picture up and this short video explains the what and why of this piece of armor.

Artifact Spotlight: Yamato Armor

Join the Naval History and Heritage Command as we Spotlight interesting and unique artifacts from the collection of the U.S. Navy. This 26" thick section of armor plate, meant for a Japanese Yamato class battleship, was found at the Kure Naval Base in Japan after the end of WWII and brought back...

www.dvidshub.net

Thanks for clearing that up, the test was done at 400ft (121m) it is in the video.

 

[Sandhi Yudha]

Two days ago around 22:30 local time during a night exercise, contact was lost with two JMSDF helicopters near the Izu-islands, 600 km south-east of Tokyo. One body of a crew member has already been recovered, but seven more crew members are still missing.

There is no information in this news article about the type of helicopters, but it was an anti-submarine exercise, so i expect these are two Sikorsky/Mitsubishi H-60 ASW-helicopters.

Dode en zeven vermisten na mogelijke botsing twee Japanse legerhelikopters

Een bemanningslid werd uit het water gehaald, maar heeft het niet gered. Naar zeven anderen wordt nog gezocht.

nos.nl

The two helicopters were near Torishima.

Izu Islands - Wikipedia

en.m.wikipedia.org

Japan's coastguard service has ordered three more Eurocopter EC225 twin-engine helicopters. This latest order brings the Japan Coast Guard's total EC225 fleet to 18.

Japan Coast Guard orders three more Airbus H225 helicopters

Japan's coastguard service has ordered three more Airbus H225 twin-engine helicopters.

www.janes.com

 

[Salinger]

Two days ago around 22:30 local time during a night exercise, contact was lost with two JMSDF helicopters near the Izu-islands, 600 km south-east of Tokyo. One body of a crew member has already been recovered, but seven more crew members are still missing.

There is no information in this news article about the type of helicopters, but it was an anti-submarine exercise, so i expect these are two Sikorsky/Mitsubishi H-60 ASW-helicopters.

Dode en zeven vermisten na mogelijke botsing twee Japanse legerhelikopters

Een bemanningslid werd uit het water gehaald, maar heeft het niet gered. Naar zeven anderen wordt nog gezocht.

nos.nl

The two helicopters were near Torishima.

Izu Islands - Wikipedia

en.m.wikipedia.org

Japan's coastguard service has ordered three more Eurocopter EC225 twin-engine helicopters. This latest order brings the Japan Coast Guard's total EC225 fleet to 18.

Japan Coast Guard orders three more Airbus H225 helicopters

Japan's coastguard service has ordered three more Airbus H225 twin-engine helicopters.

www.janes.com

Maritime Self-Defense Force helicopter crash: 1 dead, 7 missing

海自ヘリ墜落事故　搭乗員8人の氏名を公表　1人死亡、7人行方不明 | 毎日新聞

　伊豆諸島沖で海上自衛隊の哨戒ヘリコプター「SH60K」2機が夜間訓練中に墜落した事故で、海自は23日、公表済みの機長2人を含め、搭乗していた隊員8人全員の氏名を公表した。死亡が確認された1人は、大村航空基地（長崎県）所属の「8416号機」副操縦士、西畑友貴2尉だったことも明らかにした。

mainichi.jp

On the 23rd, the Japan Maritime Staff Office released the names of the eight crew members involved in an accident in which two SH60K patrol helicopters of the Maritime Self-Defense Force crashed during a night training exercise in the waters east of Torishima in the Izu Islands. One person is dead and seven people are missing.

The two aircraft are "unit 8416" assigned to Omura Air Base (Nagasaki Prefecture) and "unit 8443" assigned to Komatsushima Air Base (Tokushima Prefecture). There were four people on board each, including the captain, co-pilot, and two navigators.

The accident occurred on the night of the 20th in waters approximately 270 kilometers east of Torishima. The two planes were engaged in anti-submarine training, and the Japan Maritime Self-Defense Force believes there is a high possibility that they collided in mid-air.

幹部「査閲」中に墜落＝機体に異常確認されず―不明隊員の捜索続く・海自ヘリ事故

　東京・伊豆諸島の鳥島沖合で衝突したとされる海上自衛隊の哨戒ヘリコプター「ＳＨ６０Ｋ」２機が墜落した事故で、幹部が部隊の技量を確認する「査閲」の最中に事故が起きていたことが２２日、海自への取材で分かった。 　木原稔防衛相は同日、回収したフライトレコーダーからデータの取り出しに成功したことを明らかにした上で、「現時点で飛行中に機体に異常があったことを示すデータは確認されていない」と述べた。飛行高度やエンジン回転数、機内音声などのデータも残っており、海自は解析して事故原因の特定を急ぐ。行方不明の隊員７人の捜索も続けている。...

sp.m.jiji.com

According to the Japan Maritime Self-Defense Force, the two aircraft belong to Omura Air Base (Nagasaki Prefecture) and Komatsushima Air Base (Tokushima Prefecture). At that time, a large-scale training exercise was being carried out involving eight ships, six helicopters, and one submarine belonging to the 4th Escort Group (Kure City, Hiroshima Prefecture), two of which were the Aegis destroyer "Haguro" and a destroyer. It was installed on "Kirisame". The training was inspected by the escort fleet commander, the top of the escort fleet.

 

[Sandhi Yudha]

On this official JMSDF-tweet we can see the Yahagi (with pennant number FFM-5), the newest Mogami-class frigate being inducted into Escort Division 14, yesterday on 21 May.

The JMSDF had originally planned to build a total of 22 30FFM Mogami-class frigates. These 30FFM multi-mission frigates have a full load displacement of about 5500 tons and a length of 132,5 meters.
However, it has decided to now procure a total of only 12 such frigates until the current fiscal year 2023, with plans to acquire a new class of 12 FFMs from 2024 until 2028. The new frigates will essentially be improved Mogami-class ships that are set to be built to the design proposed by MHI, actually an improved second batch.

This new-class FFM will be fitted with longer-range missiles, enhanced anti-submarine capabilities, and improved capabilities for various maritime operations.

x.com

x.com

Japan Commissions Fifth Mogami-Class Frigate ‘Yahagi’ 「やはぎ」 - Naval News

The JMSDF commissioned into service the fifth Mogami-class frigate in a ceremony held on 21 May 2024 in Nagasaki City in western Japan.

www.navalnews.com

 

[Ananda]

So they recycle the namesake of IJN Last Light Cruiser. The one that sunk together with Yamato. Will they then going to recycle Yamato or Musashi name sake? Perhaps for their plan over blown destroyer.

 

[Sandhi Yudha]

So they recycle the namesake of IJN Last Light Cruiser. The one that sunk together with Yamato. Will they then going to recycle Yamato or Musashi name sake? Perhaps for their plan over blown destroyer.

Officially the frigate was named after the Yahagi River (矢作川, Yahagi-gawa) that flows through Nagano. But it is for the most of us just unpredictable which names they will (re)use for the future giant AEGIS-cruisers.

 

[Redlands18]

So they recycle the namesake of IJN Last Light Cruiser. The one that sunk together with Yamato. Will they then going to recycle Yamato or Musashi name sake? Perhaps for their plan over blown destroyer.

Always have a bit of a chuckle whenever I see a Soryu class Sub at Pearl Harbour.

 

[Ananda]

I remember long time ago when I'm still at 5th grade, I read Indonesian translation of Capt Tameichi Hara memoar of his commands during the war. From his first destroyer Amatsukaze to his last the Light Cruiser Yahagi. Which he himself seems amaze that he still alive, as Yahagi last trip he knows supposedly one way trip.

Anyway then I realize later on most of the IJN namesake that he mentioned has been mostly recycle by JMSDF. Now come Yahagi, which makes me wonder when Yamato and Musashi will come out. Perhaps will be too controversial, as those name represents the culmination of IJN Battleships and then Imperial Japanese ambition.

However who knows. Perhaps they will reinvigorate Japanese national spirit for 'self defense'.

 

[John Fedup]

I remember long time ago when I'm still at 5th grade, I read Indonesian translation of Capt Tameichi Hara memoar of his commands during the war. From his first destroyer Amatsukaze to his last the Light Cruiser Yahagi. Which he himself seems amaze that he still alive, as Yahagi last trip he knows supposedly one way trip.

Anyway then I realize later on most of the IJN namesake that he mentioned has been mostly recycle by JMSDF. Now come Yahagi, which makes me wonder when Yamato and Musashi will come out. Perhaps will be too controversial, as those name represents the culmination of IJN Battleships and then Imperial Japanese ambition.

However who knows. Perhaps they will reinvigorate Japanese national spirit for 'self defense'.

Probably slightly more probable than Germany naming a new warship Bismarck.

 

[Ananda]

Xavier video with Japanese Head RnD of Japanese defense procurement agency (ATLA). Basically he give broad explanation of what Japan looking for future Submarines and Destroyers.

The Destroyers actually shown something that can compete with China Type 055, with Laser and Rail Gun as standard. While for Submarines even tough they envision better under sea range and handling, however extended network to be able controlling UUV.

 

[Sandhi Yudha]

According to Rolls-Royce, the MT-30 is selected by Japan for the furure Aegis System Equipped Vessel (ASEV) cruisers. The MT30 has 80% commonality with the Trent 800, one of the engine options for the Boeing 777.

The power rating is between 25-40 MW, which seems to be enough for these huge vessels, but that is actually not surprising, because the MT-30 is already in use for the Zumwalt class cruisers, the Trieste and the Queen Elizabeth class aircraft carriers (two on each vessel).

Rolls Royce JMSDF

Japan Chooses Rolls-Royce MT30 Engines for New Destroyer Fleet.

www.armyrecognition.com

 

[John Fedup]

I believe MT-30s are used in the Freedom class version of the LCS and all T26 versions will have a single MT-30.

 

[swerve]

Also Mogami-class & the FFX-II & FFX-III. It's getting quite popular

 

[Ananda]

The CG channel finally make overall CG rendering for all 25 IJN Aircraft Carriers.

This include the Fleet Carrier and Escort Carrier. Quite interesting effort they make on CG rendering, and for me basically shown overall history of IJN carriers group.

 

[John Fedup]

Some additional information about design considerations for Japan’s future air defence destroyers.

Japan Sets Course for New 13DDX Air Defence Destroyer - Naval News

Japan plans to begin design work on a new, high-end air-defence destroyer known as 13DDX in fiscal year 2024 (FY24).

www.navalnews.com

 

[Sandhi Yudha]

Some additional information about design considerations for Japan’s future air defence destroyers.

Japan Sets Course for New 13DDX Air Defence Destroyer - Naval News

Japan plans to begin design work on a new, high-end air-defence destroyer known as 13DDX in fiscal year 2024 (FY24).

www.navalnews.com

Thanks for sharing.
|"Further future requirements for 13DDX include a compact design; ...."|
So this is a new destroyer class under development which is a different class than the "Aegis system equipped vessels" (ASEV) which have the size of heavy cruisers, right?

 

[Redlands18]

Thanks for sharing.
|"Further future requirements for 13DDX include a compact design; ...."|
So this is a new destroyer class under development which is a different class than the "Aegis system equipped vessels" (ASEV) which has the size of heavy cruisers, right?

I think these are the replacements for the Burke derivatives, Kongo and Atago classes. Which are getting quite long in the Tooth, Kongo is 31yo.

 

[John Fedup]

Thanks for sharing.
|"Further future requirements for 13DDX include a compact design; ...."|
So this is a new destroyer class under development which is a different class than the "Aegis system equipped vessels" (ASEV) which have the size of heavy cruisers, right?

As per Redlands 18 post, yes this future destroyer is different from ASEV and is a replacement for the Burke derivatives with lots of new technology.