Following the IJN's concept of mine-layer, she was designed with secondly role as an anti-submarine boat in addition to the primary role as a coastal mine layer/mine sweeper. She was mainly used as a mine sweeper tender during her service.
| Standard Displacement | 634t |
| Length | 65.55m |
| Beam | 7.90m |
| Draught | 2.64m |
| Machine Type | 2 Sasebo 5LKT42/56 Diesel |
| Output | 2500PS |
| Number of shaft | 2 |
| Speed | 18kt |
| Crew | 87 |
| Original | |
| Guns | 1 Mk 1 40mm MG(II)
2 Mk10 20mm MG(I) |
| AS Weapons | 1 Type 54/Mk 10 Hedgehog Launcher
4 Type 54/Mk 6 K-Gun 2 Depth Charge Rack (also used for mine laying) 1 Type 53 Mine sweeping set |
| Electronic Equipment | 1 SPS-5 SS Radar
1 Mk 51 GFCS QHBa Sonar |
| Name | Laid Down | Launched | Completed | Deleted |
| AMC 491 Erimo | 1954/12/10 | 1955/07/12 | 1955/12/28 | 1976/03/31 (YAS 69)
1982/03/27 |