| Ship Class Used On | Submarines |
| Notes: The Japanese version of the USA's Mark 37 torpedo. Details may be found at USA Post-World War II Torpedoes. | |
| Ship Class Used On | Uzushio and Ushio classes |
| Date Of Design | 1980 |
| Date In Service | 1984 |
| Weight | about 1,430 lbs. (649 kg) |
| Overall Length | 135 in (3.429 m) |
| Explosive Charge | about 330 lbs. (150 kg) Torpex |
| Range / Speed | Classified, over 30 knots |
| Power | Battery |
| Notes: A wire-guided ASM torpedo developed from the Japanese version of the USA's Mark 37 and the GRX-1 and GRX-2 experimental programs. Has better performance, including higher speed, than does the Mark 37. | |
| Ship Class Used On | Submarines |
| Date Of Design | 1989 |
| Date In Service | 1992 |
| Weight | N/A |
| Overall Length | N/A |
| Explosive Charge | 589 lbs. (267 kg) |
| Range / Speed | about 54,000 yards (49,380 m) @ 40 knots
about 42,000 yards (38,400 m) @ 55 knots Reported maximum speed is 70 knots |
| Power | N/A |
| Notes: The standard heavy submarine torpedo, roughly equivalent to the USA's Mark 48. Formerly the GRX-2. | |