| Unit Name: | Fleet Submarine Force |
| Native Name: | 潜水艦隊 |
| Dates: | 10 February 1981 – present |
| Country: | Japan |
| Allegiance: | Japan |
| Branch: | Japan Maritime Self-Defense Force |
| Role: | Fleet |
| Size: | approx 1,800 people |
| Command Structure: | Self-Defense Fleet |
| Garrison: | Yokosuka |
| Anniversaries: | 10 February |
| Website: | https://www.mod.go.jp/msdf/sbf/index.html |
| Ceremonial Chief Label: | Chief of Staff |
| Colonel Of The Regiment Label: | Operation Chief Staff |
| Commander4 Label: | Commander of Amphibious Warfare |
The Fleet Submarine Force belonged to the surface force for the self-defense fleet of the Maritime Self-Defense Forces. It is a fleet organized around submarines belonging to the Self-Defense Fleet of the Japan Maritime Self-Defense Force.[1]
On 1 February 1965, the 1st Submarine Group was newly formed under the Self-Defense Fleet. On 16 October 1973, the 2nd Submarine Group was newly formed under the Self-Defense Fleet. On 10 February 1981, the Submarine Fleet was newly formed under the Self-Defense Fleet (Headquarters, 1st Submarine Group, 2nd Submarine Group, Submarine Education and Training Corps).
On 9 March 2000, a new edition of the 1st Training Submarine. Initially, the submarines belonged in the group were JDS Asashio and JDS Setoshio.[2] On 22 March 2002, the Yokosuka Submarine Education and Training Detachment was newly established in the Submarine Education and Training Corps. On 1 October 2020, the Submarine Fleet Command moved to the new Maritime Operations Center, a new government building of the Self-Defense Fleet Command completed in the Funakoshi area.[3]