- Boats
- Submarines of comparable era and role
- See also
{{unreferenced|date=January 2009}}{{Infobox ship image| Ship image=JS Natsushio (SS-523).jpg | Ship caption=JS Natsushio (SS-523)
}}{{Infobox ship class overview | Name=Natsushio | Builders=*New Mitsubishi Heavy Industries,- Kawasaki Shipbuilding Corporation
| Japan}} | Hayashio|submarine|4}} | Class after= | Subclasses= | Cost= | Built range=1961–1963 | In service range= | In commission range=1963–1980 | Total ships building= | Total ships planned=2 | Total ships completed=2 | Total ships cancelled= | Total ships active= | Total ships laid up= | Total ships lost= | Total ships retired=2 | Total ships preserved=
}}{{Infobox ship characteristics | Hide header= | Header caption= | Ship type=Coastal (Hunter-killer) Submarine | 790|LT|t|0|lk=in}} surfaced | 61|m|ftin|abbr=on}} | 6.5|m|ftin|abbr=on}} | Ship height= | 4.1|m|ftin|abbr=on}} | 6.4|m|ftin|abbr=on}} | Ship propulsion=*Diesel-electric, 2 shafts- 900 BHP (surfaced)
- 2,300 SHP (submerged)
| 11|kn|lk=in}} surfaced- {{convert|15|kn}} submerged
| Ship range= | Ship endurance= | Ship test depth= | Ship complement=40 | Ship sensors= | Ship EW= | 533|mm|in|0|abbr=on}} torpedo tubes | Ship armour= | Ship notes=
}} | The Natsushio-class submarines were significantly smaller than the next generation Japanese submarines, {{ship|JDS|Ōshio|SS-561|2}}, and the Natsushio-class submarines were the development of the {{sclass-|Hayashio|submarine|1}}s. Also, the Natsushio class is one of the (coast-defence) hunter-killer submarine (SSK) of JMSDF. Construction of the two subs in the class was approved under the First Defense Buildup Program 1958-1960. However, the MSDF brass did not welcome the small submarines. Ongoing maneuvering regarding defense spending by the Ministry of Finance did not help matters. At the time, the Maritime Staff Office was trying to move the MSDF away from being a predominantly green-water navy (due to politics and budgetary issues this would not begin to happen until the 1980s). Small coastal SSKs like the Natsushio did not fit into such plans for the future. Therefore, neither further examples nor a successor class were built. Boats| Project no. | Building no. | Pennant no. | Name | Laid down | Launched | Commissioned | Note | | S116 | 8703 | SS-523 | Natsushio|なつしお}} | 5 December 1961 | 18 September 1962 | 29 June 1963 | Decommissioned 20 March 1978, scrapped | | 8704 | SS-524 | Fuyushio|ふゆしお}} | 6 December 1961 | 14 December 1962 | 17 September 1963 | Decommissioned 10 June 1980, scrapped | |
Submarines of comparable era and role- Quebec-class submarine - Soviet Navy
- Draken-class submarine - Royal Swedish Navy
- Toti-class submarine - Marina Militare (Italian Navy)
See also- Ro-100-class submarine - Imperial Japanese Navy
- Ha-201-class submarine - Imperial Japanese Navy
{{Natsushio class submarines}}{{Combatant ship classes of the Japan Maritime Self-Defense Force}}{{Japan-mil-ship-stub}} 3 : Submarine classes|Natsushio-class submarines|Mitsubishi Heavy Industries submarines |