Part of the JMSDF's first domestic ship building program, her main mission was to lay listening devices around bases/ports. Initially she was also given mine laying/anti-submarine missions, but these equipments were removed during the major refit.
| Standard Displacement | 926t
2150t (after refit) |
| Length | 72.00m
103.00m (after refit) |
| Beam | 10.40m
12.40m (after refit) |
| Draught | 3.37m
4.90m (after refit) |
| Machine Type | 2 Harima-Zultser 6MD-42/50 Diesel |
| Output | 3200PS |
| Number of shaft | 2 |
| Speed | 16kt
13kt (after refit) |
| Crew | 100 |
| Original | Refit (1970) | |
| Guns | 1 Type 54/Mk 22 3in/50(I)
2 Mk10 20mm MG(I) |
2 Mk10 20mm MG(I) |
| AS Weapons | 4 Type 54/Mk6 K-Gun
1 Type 54 DC Rack 2 Mine Rack 1 Cable Laying set |
1 Cable Laying set |
| Electronic Equipment | 1 SPS-5 SS Radar
Mk 51 GFCS QHBa Sonar |
1 SPS-5 SS Radar
SQS-11A Sonar |
| Name | Laid Down | Launched | Completed | Deleted |
| ARC 481 Tsugaru | 1954/12/18 | 1955/07/19 | 1955/12/15 | 1980/03/17 (ASU7001)
1990/03/15 |