She is an enlarged version of Kari class sub-chaser.
| Standard Displacement | 423t
430t (PC 316) 440t (PC 319/320) |
| Length | 60.00m |
| Beam | 7.10m |
| Draught | 2.26m
2.40m (PC 316/319/320) |
| Machine Type | 2 Kawasaki-MAN V8V22/30 Supercharged Diesel |
| Output | 3800PS |
| Number of shaft | 2 |
| Speed | 20.4kt |
| Crew | 80 |
| Guns | 1 Mk 1 40mm(II) |
| AS Weapons | 1 Type 54/Mk 10 Hedgehog Launcher
1 Type 54 Depth Charge Rack 2 Mk 2 Torpedoe Launcher (PC 311-315) 2 Type 68/Mk 32 Torpedoe Launcher (III) (PC 316/319/320) |
| Electronic Equipment | 1 OPS-16 SS Radar
1 Mk 4 FC Radar 1 Mk 63 GFCS 1 SQS-11A Sonar 1 OLR-4B ESM (PC 311/312) 1 NOLR-1 ESM (PC 313-) |
| Name | Laid Down | Launched | Completed | Deleted |
| PC 311 Mizudori | 1959/03/13 | 1959/09/22 | 1960/02/27 | 1981/03/27 (ASU89)
1985/03/27 |
| PC 312 Yamadori | 1959/03/14 | 1959/10/22 | 1960/03/15 | 1981/03/27 (ASU90)
1985/03/27 |
| PC 313 Ootori | 1959/12/16 | 1960/05/27 | 1960/10/13 | 1982/03/27 (ASU 61)
1985/10/31 |
| PC 314 Kasasagi | 1959/12/18 | 1960/05/13 | 1960/10/31 | 1981/03/05 (ASU 87)
1985/03/27 |
| PC 315 Hatsukari | 1960/01/25 | 1960/06/24 | 1960/11/15 | 1982/03/27 (ASU 62)
1985/10/31 |
| PC 316 Umidori | 1962/02/15 | 1962/10/15 | 1963/03/30 | 1984/03/30 (ASU 63)
1987/03/24 |
| PC 319 Shiratori | 1964/02/29 | 1964/10/08 | 1965/02/26 | 1986/03/19 (ASU 66)
1989/03/24 |
| PC 320 Hiyodori | 1965/02/26 | 1965/09/25 | 1966/02/28 | 1987/05/21 (ASY 92)
1999/07 ? |