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Fleet Air Squadron 21 (第21航空隊, dainijuuichikoukuutai) (which is also referred to as HS-21) is a unit in the Japanese Maritime Self-Defence Force. It is a part of the Fleet Air Force and comes under the authority of Fleet Air Wing 21.[1] Equipped with Mitsubishi SH-60J & SH-60K anti-submarine helicopters, it is based at Tateyama Air Base in Chiba Prefecture.[2][3]

Fleet Air Squadron 21 (HS-21)
Active26 March 2008
Country Japan
Branch Japan Maritime Self-Defense Force
Part ofFleet Air Force, Fleet Air Wing 21
Garrison/HQTateyama Air Base
Aircraft flown
HelicopterSH-60J & SH-60K

Squadron structureEdit

The squadron is composed of two flights:

  • 211th Flight is equipped with SH-60J and SH-60K helicopters
  • 212th flight is equipped with only SH-60K helicopters


  1. ^ "What is the Japan Maritime Self-Defense Force". Retrieved May 21, 2018.
  2. ^ Thompson, Paul JMSDF - Order of Battle February 1st, 2018 Retrieved May 21, 2018
  3. ^ Airborne Ocean Surveillance Retrieved February 9, 2017