License built version of Sikorsky S-61A with Japanese engines and avionics. 3 built for JMSDF service as SAR helicopters. 
List of Operators of S-61A |
| Years | Model | Org | |
|---|---|---|---|
| 1964/08 | S-61 |  Japan Maritime Self-Defense Force |
Global Distribution of S-61A |
|
Construction Numbers |
| C/N | Year | History | |
|---|---|---|---|
| M61-008 | 1963 | 8181 | |
| M61-010 | 1963 | 8182 | |
| M61-071 | 8183 |
