Jane's Fighting Ships notes their similarity to the U.S. Avenger-class minesweepers.
The forecastle was stretched to more than 3/4 of the total length to suppress the increase of retention and member dimensions of the longitudinal strength.[1]
In order to cope with an increase in shear stress accompanying the enlargement of the ship and thickness increase, the outer plate structure has a three layer double arrow blade structure in which the inner layer plates are inclined at right angles to each other and a vertical laminate of the outer layer is stretched to this It is said. In the case of adopting the same double arrow blade structure as the conventional minesweeping boat, it was thought that the inner layer board thickness became 47 mm, but it is suppressed to 20 mm by this.
The use of various tree species, seen in the list below, is the same as the Uwajima-class minesweepers.
The main engine is equipped with Mitsubishi Heavy Industries 4-cycle non-magnetic diesel engines of the same design as in the Uwajimas but with a larger output (1,200 hp / 1,000 Rpm) mounted via a double anti-vibration device. It is the first minesweeper in the Japanese navy to feature a bow thruster, GPS equipped with a precision navigation equipment and automatic Sokan apparatus in order to improve the ship's ability to hold position.
| Pennant no. | Name | Laid down | Launched | Shipyard | Commissioned | Decommissioned | Home port | Unit | |
|---|---|---|---|---|---|---|---|---|---|
| MSO-301 | 30 August 1990 | 29 August 1991 | 16 March 1993 | 28 June 2016 | Minesweeper Division 51 | ||||
| MSO-302 | 20 July 1990 | 20 September 1991 | 23 March 1993 | 1 July 2016 | Minesweeper Division 51 | ||||
| MSO-303 | 17 May 1991 | 15 December 1992 | 24 March 1994 | 6 June 2017 | Minesweeper Division 51 |