Updated Table of Japan's Soryu & Oyashio Submarine Program: Admiral Kobayashi

On September 4, 2017 Anonymous provided new information here and here updating Submarine Matter's Amended Improvements & Higher Costs of Soryu Mark IIs Over Mark Is of August 21, 2017

 TABLE - SORYU & Oyashio Program as at January 16, 2018 

SS No.	Build No Name	Pennant No.	MoF approved amount ¥ Billions FY	LABs, LIBs, AIP	Laid Down	Laun -ched	Commi ssioned	Built By
5SS Oyashio	8105 Oyashio	SS-590/ TS3608	¥52.2B FY1993	LABs only	Jan 1994	Oct 1996	Mar 1998	KHI
6SS-15SS Oyashios 10 subs	8106 -8115 various	SS-591-600	¥52.2B per sub FY1994-FY2003	LABs only	15SS Feb 2004	15SS Nov 2006	15SS Mar 2008	MHI & KHI
16SS Soryu Mk 1	8116 Sōryū	SS-501	¥60B FY2004	LABs + AIP	Mar 2005	Dec 2007	Mar 2009	MHI
17SS	8117 Unryū	SS-502	¥58.7B FY2005	LABs + AIP	Mar 2006	Oct 2008	Mar 2010	KHI
18SS	8118 Hakuryū	SS-503	¥56.2 FY2006	LABs + AIP	Feb 2007	Oct 2009	Mar 2011	MHI
19SS	8119 Kenryū	SS-504	¥53B FY2007	LABs + AIP	Mar 2008	Nov 2010	Mar 2012	KHI
20SS	8120 Zuiryū	SS-505	¥51B FY2008	LABs + AIP	Mar 2009	Oct 2011	Mar 2013	MHI
No 21SS			No 21SS built
22SS	8121 Kokuryū	SS-506	¥52.8B FY2010	LABs + AIP	Jan 2011	Oct 2013	Mar 2015	KHI
23SS	8122 Jinryu	SS-507	¥54.6B FY2011	LABs + AIP	Feb 2012	Oct 2014	7 Mar 2016	MHI
24SS	8123 Sekiryū	SS-508	¥54.7B FY2012	LABs + AIP	15 Mar 2013	2 Nov 2015	13 Mar 2017	KHI
25SS	8124 Seiryū	SS-509	¥53.1B FY2013	LABs + AIP	22 Oct 2013	12 Oct   2016	Mar? 2018	MHI
26SS	8125 Shyuriyu	SS-510	¥51.7B FY2014	LABs + AIP	2014	6 Nov 2017	Mar 2019?	KHI
27SS First Soryu Mk 2	8126	SS-511	¥64.4B FY2015	LIBs only	2015	late 2018?	Mar 2020	MHI
28SS  Second Soryu Mark 2	8127	SS-512	¥63.6B FY2016	LIBs only	2016?	late 2019?	Mar 2021?	KHI
29SS First Soryu Mk 3 (1) (3)	8128	?	¥76B FY2017	LIBs only	?	?	2023?	MHI?
30SS Second Soryu Mk 3 (2)	8029?	?	¥71.5B FY2018	LIBs only	?	?	2024?	KHI?

Table from information exclusively provided to Submarine Matters. LABs = lead-acid batteries, AIP = air independent propulsion, LIBs = lithium-ion batteries. ¥***B = Billion Yen. MHI = Mitsubishi Heavy Industries, KHI = Kawasaki Shipbuilding Corporation of Kawasaki Heavy Industries.

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Japan’s Ministry of Defense (MOD) announced the Financial Year FY 2018 budget on August 31, 2017. Based on the FY 2017 and FY 2018 budgets, the SORYU & Oyashio Program Table (above) can be revised (in red) as follows.

(1) Correction of 29SS; i) “Build No” is 8128; “[the Japanese Ministry of Finance (MoF)] approved amount Yen Billions & FY” is JPY 76 (7.6*)B FY2017.

(2) Addition of 30SS; i) “Build No” is 8029?; MoF approved amount Yen Billions & FY” is JPY 71.5 (2.3*)B FY2018 (submitted).

* Figure in bracket is the first year cost, such as new equipment, and is excluded from the FY budget number. In other words, the real budgets for 29SS and 30SS are 83.6 (=76 + 7.6) and 73.8 (=71.5 + 2.3) JPY B (Billion Japanese Yen), respectively. The first year cost for both 29SS and 30SS recognises that the builders of the two submarines are different.

According to the MOD, first year costs include i) design, ii) test, iii) technical collaboration, and iv) acquisition costs. These costs exclude jigs/tools, machines and equipment. These costs are related to the first year procurement and are specially required for production. 

The first year cost of 29SS (ie. 7.6 B JPY) is much higher than 30SS (2.3 B JPY). One major cost component may be design. The design cost of 29SS is obviously higher than 30SS.

(3) For application in future 29SS-type submarine, a budget for the study of a new silent driving system has been submitted.

Research on the quiet propulsion (or silent driving?) system and hull shape are considered budgeting. The results of previous research will be applied to 29SS-type submarine. An issue remains whether 29SS type submarines can be called Soryu Mark 3 or Soryu Mark 4. A submarine class that follows the Soryus will likely be based on additional research.

Reported in the Japanese language publication SHIPS OF THE WORLD, October 2017 - the ex-commander of the submarine fleet Admiral (retired) Masao Kobayashi (photo and bio details below from Submarine Matters' records) has revealed that 29SS is an upgraded version of the Soryu, with improved LIBs, improved sonars and other performance improvements. So 29SS and 30SS can be considered Soryu Mark 3s.

 Vice Admiral Masao KOBAYASHI, JMSDF (Retired)  

Masao KOBAYASHI has performed as an adviser to Japan's National Security Council. He graduated from the Japanese Defense Academy in 1973 and commenced a career in the JMSDF submarine service. He held many posts in the submarine force.

Shore billets included Submarine Branch Head in the Ship Systems Section in the Maritime Staff Office and Operations Officer in the Fleet Submarine Force.

He has commanded TAKASHIO SS-571 (Uzushio class submarine), and was Commander of Submarine Division Two. In 2001/2 he was the Commander of Submarine Flotilla One, and was Coordinator of Exercise at sea for Pacific Reach 2002.

Masao’s last post was as Commander of the Fleet Submarine Force (2007 - 2009). He retired from the JMSDF in 2009. Vice Admiral KOBAYASHI served with distinction in the JMSDF and is well regarded as an authority in the international submariner community. 

Anonymous and Pete