Updated Japanese Oyashio-Soryu-Taigei Table With Introduction

INTRODUCTION

Japan uses a continuous build (1 new submarine per year) system. New classes (Oyashio, Soryu and Taigei) are created every 10 years or so. Production is shared between Kawasaki Heavy Industries (KHI) and Mitsubishi Heavy Industries (MHI). There are gradual improvements (often in power and sensor systems) within classes and between classes.

Also see SubMatt's Updated History & Photos of Japanese Submarines After WWII of January 17, 2015 at https://gentleseas.blogspot.com/2015/01/history-of-japanese-submarine-after-wwii.html .
It contains a vast amount of Japanese originated information on Japanese submarines. From the end of WWII (September 2, 1945) to June 30, 1960 Japan had no operational submarines.  From December 1957 (First Oyashio class laid down) Japan restarted submarine production based on US experience (eg US Gato class) and based on long institutional experience building advanced submarines for the former WWII Imperial Japanese Navy.

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TABLE

This Table is unique to Submarine Matters mainly created by "S" Anonymous and Pete.

Japan's Diesel-Electric Classes of Submarine (SSKs)

The Second Oyashio class-Soryus-Taigeis as at September 20, 2024. 

SS No. Diesel Type Motor	Build No Name	Pennant No.	Ministry of Finance (MoF) approved Ministry of Defense Budget in Billions of Yen (¥B)	LABs + AIP: or LIBs	Laid Down	Laun -ched	Comm ission ed	Built By
5SS + 6SS now training Oyashios 2 Toshiba motors	8105 + 8106 Oya shio means currents	SS-590/ now TSS3608, SS-591 now TSS3609	¥52.2B FY1993 2 x 12V25/25S  diesels for all Oyashio class (each diesel 2,000kW)	LABs only	1994 & 1995	1996 & 1997	1998 & 1999 Converted to training subs on 2015 + 2017	Built at KHI
7SS-15SS 8 active Oyashios  10 subs 2 Toshiba motors SMC-7?	8107 -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 12 Active Soryus/ Dragon class  Mk I Collided with Ocean Artemis Feb 8, 2021	8116 Sōryū means dragon 2,900 tonnes surf- aced	SS-501	¥60B FY2004  Mk.1 LAB+AIP Soryus have 2 x Kawasaki  12V25/25SB  diesels (totaling 4,240kW) + 4 x 4V-275R Mk.III AIP + a SMC-8 motor	LABs + AIP	Mar 2005	Dec 2007	Mar 2009	Built at MHI Home Port Kure
17SS	8117 Unryū	SS-502	¥58.7B FY2005	LABs + AIP	Mar 2006	Oct 2008	Mar 2010	KHI Kure
18SS	8118 Hakuryū	SS-503	¥56.2 FY2006	LABs + AIP	Feb 2007	Oct 2009	Mar 2011	MHI Kure
19SS	8119 Kenryū	SS-504	¥53B FY2007	LABs + AIP	Mar 2008	Nov 2010	Mar 2012	KHI Kure
20SS	8120 Zuiryū	SS-505	¥51B FY2008	LABs + AIP	Mar 2009	Oct 2011	Mar 2013	MHI Yokosuka
21SS LIBs Concept Research Project			No 21SS built. It was an 8 year research project on LIBs. 1st LIBs sub launched was 27SS in 2018.
22SS	8121 Kokuryū	SS-506	¥52.8B FY2010	LABs + AIP	Jan 2011	Oct 2013	Mar 2015	KHI Yokosuka
23SS	8122 Jinryu	SS-507	¥54.6B FY2011	LABs + AIP	Feb 2012	Oct 2014	7 Mar 2016	MHI Kure
24SS	8123 Sekiryū	SS-508	¥54.7B FY2012	LABs + AIP	15 Mar 2013	2 Nov 2015	13 Mar 2017	KHI Kure
25SS	8124 Seiryū	SS-509	¥53.1B FY2013	LABs + AIP	22 Oct 2013	12 Oct   2016	12 Mar 2018	MHI Yokosuka
26SS	8125 Shoryū	SS-510	¥51.7B FY2014 last SMC-8 motor	LABs + AIP	2014	6 Nov 2017	18 Mar 2019	KHI Kure
27SS a Soryu "Mk II" as it has LIBs. 1st Soryu Mk II	8126 Oryū 11th Soryu	SS-511	¥64.4B FY2015  with 2 12V25/25SB diesels (totaling 4,240kW)  SMC-8B motor. [Wispy &  Anon agree it has 640 LIB/SLH modules], other improvements	LIBs only (SLH type)	Nov 2015	4 Oct 2018	5 Mar 2020	MHI Kure
28SS Soryu Mk II, 12th & final Soryu	8127 Toryu	SS-512	¥63.6B FY2016 "2,950t" surfaced 2 12V25/25SB  diesels [Wispy & Anon  agree it has 640 LIB/SLH modules],	NCA? LIBs	Jan 2017	6 Nov  2019	24 Mar 2021	KHI Yokosuka
29SS 1st Taigei Class means Whale 3,000 tonne (surfaced)	8128 Taigei "Big  whale" Used as a test sub. Not opera- tional	SS-513	¥76B FY2017 (Heisei 29) Higher ¥76B budget  may be due to 1st of class many changes.  2 x 12V25/25SB diesels or variants (totaling 4,240kW). [Wispy  says 640 LIB/SLH modules, Anon says 720.]	SLH LIBs maybe 960	16 Mar 2018	14 Oct 2020	9 Mar 2022	MHI Home Port Yokosuka
30SS  2nd Taigei Class  whale a mythol- ogical creature	8129 Hakugei "White whale" First opera- tional Taigei	SS-514	¥71.5B FY2018  (Heisei 30) 12V25/25SB diesels or variants (totaling 4,240kW) , [Wispy  says 640 LIB/SLH modules, Anon says 720.]	SLH LIBs	25 Jan 2019	14 Oct 2021	20 Mar 2023	KHI Home Port Kure
01SS  3rd Taigei Class	8130 Jingei "Swift whale"	SS-515	¥70B FY2019 (Reiwa 01) 12V25/25SB diesels or variants (total 4,240kW)	SLH LIBs maybe 960+	24 Apr 2020	12 Oct 2022	8 Mar 2024	MHI
02SS  4th Taigei Class	8131 Raigei Thunder whale	SS-516	¥B70.2B FY2020 (Reiwa 02) Improved SLH LIBS. New 2 x 12V25/31S diesels (totaling 5,520kW)	Impro ved SLH LIBs	26 Mar 2021	17 Oct 2023	Mar 2025?	KHI?
03SS	8132	SS-517	¥B68.4 FY2021	LIBs	2022?	2024?	March 2026?	MHI
04SS	8133	SS-518	¥B73.6B FY2022	LIBs	2022?	2024?	2026?	MHI?
05SS	8134	SS-519	¥80.8B FY2023	LIBs	2023?	2025?	2027?	KHI?
06SS	8135	SS-520	¥95.00FY2024  enhanced detection capabilities to effectively conduct info gathering warning & surveillance page 24  [1]	LIBs	2024?	2026?	2028?	MHI?
07SS	8136	SS-521	¥B? FY2025	LIBs	2025?	2027?	2029?	KHI?
08SS	8137	SS-522	¥B? FY2026	LIBs	2026?	2028?	2030?	MHI?

Key to Table: Table information provided by S = Anonymous 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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[1] Japanese “Ministry of Defense Progress and Budget in Fundamental Reinforcement of Defense Capabilities: Overview of the FY2024 Budget” page 23 
at https://www.mod.go.jp/en/d_act/d_budget/pdf/20240607a.pdf

From the Japanese Ministry of Defense (MOD): "Defense Budget" List going back to Financial Year FY2020 at https://www.mod.go.jp/en/d_act/d_budget/index.html