Japan Sea
IHO sea area 52 · 126° to 142° E, 33° to 52° N
- in force
- 0
- last 12 months
- 16
- archive messages
- 1,301
- categories
- 15
What the archive shows
1,301 messages are recorded since 1993-06-02 for the Japan Sea. The selection uses the IHO sea area; a message may describe an exercise, equipment outage or continuing operation as well as a hazard report.
Exercises accounts for 635 of 1,301 recorded messages (49%), the largest category group in this selection.
The NGA historical archive froze in 2024-05; live collection began 2026-08-17. Counts around that gap are incomplete, and changes in reporting volume do not establish changes in incident frequency.
In force now · 0
Nothing in force in this sea right now.
By year
By month (all years)
By category · available archive
| Exercises | 635 | 49% |
| Missiles | 190 | 15% |
| Other | 105 | 8% |
| Incidents | 103 | 8% |
| Quakes | 87 | 7% |
| Derelicts | 51 | 4% |
| Surveys | 34 | 3% |
| Ordnance | 29 | 2% |
| Cable ops | 24 | 2% |
| Nav aids | 17 | 1% |
| Restricted | 15 | 1% |
| Wrecks | 5 | 0% |
| Debris | 3 | 0% |
| Containers | 2 | 0% |
| Volcanic | 1 | 0% |
Archive · 1,301 cancelled
- HYDROPAC 119/25 · Exercises2025-01-18 → 2025-06-16Gunnery exercises 2200Z to 1300Z daily 23 jan thu 20 feb in area bound by 47-01.00N 141-20.80E, 46-57.50N…
- USGS-US7000NU90 · Quakes2024-11-26 → 2024-11-2938 km wnw of hakui, japan
- HYDROPAC 3132/24 · Exercises2024-09-25 → 2024-11-22Gunnery exercises 2200Z to 1200Z daily 30 sep thru 24 oct in area bound by 47-01.00N 141-20.80E, 46-57.50N…
- USGS-US7000MPPU · Quakes2024-06-02 → 2024-06-0540 km ne of anamizu, japan
- HYDROPAC 1391/24 · Exercises2024-04-27 → 2024-05-31Gunnery exercises 2200Z to 0800Z daily 01, 02, 05 thru 07, 12 thru 17, 19 thru 24 and 26 thru 30 may in area…
- HYDROPAC 1285/24 · Missiles2024-04-19 → 2024-04-26Missile operations 230001Z to 231000Z, 240001Z to 241400Z and 260500Z to 261400Z apr in area bound by…
- HYDROPAC 1277/24 · Missiles2024-04-18 → 2024-04-19Missile operations 230000Z to 231000Z, 240000Z to 241400Z and 260500Z to 261400Z apr in area bound by…
- HYDROPAC 1276/24 · Missiles2024-04-18 → 2024-04-24Missile operations 1400Z to 0800Z daily 23 thru 26 apr in area bound by 42-50.00N 131-42.03E, 42-52.00N…
- HYDROPAC 1240/24 · Exercises2024-04-16 → 2024-04-30Gunnery exercises 2200Z to 1200Z daily 17 thru 29 apr in area bound by 47-01.00N 141-20.80E, 46-57.50N…
- HYDROPAC 1006/24 · Exercises2024-03-27 → 2024-04-30Gunnery exercises 2200Z to 0800Z daily 31 mar thru 05 apr, 07 thru 12, 14 thru 19, 21 thru 26, 28 and 29 apr…
- HYDROPAC 845/24 · Missiles2024-03-13 → 2024-03-25Missile operations 1400Z to 0800Z daily 18 thru 24 mar in area bound by 50-16.00N 140-28.20E, 50-11.30N…
- HYDROPAC 807/24 · Exercises2024-03-11 → 2024-03-29Gunnery exercises 2200Z to 1200Z daily 13 thru 28 mar in area bound by 46-57.50N 141-34.50E, 47-01.00N…
- HYDROPAC 436/24 · Nav aids2024-02-06 → 2024-02-07NAVTEX station yokohama (I) 35-14.55N 139-55.28E off air
- HYDROPAC 386/24 · Exercises2024-01-31 → 2024-02-29Gunnery exercises 2200Z to 0800Z daily 02, 04, 07, 09, 11, 14, 16, 20, 21, 23, 25 and 28 feb in area bound…
- HYDROPAC 385/24 · Exercises2024-01-31 → 2024-02-29Gunnery exercises 1400Z to 1400Z daily 02, 03, 05, 07, 10, 11, 19 thru 21, 24, 25, 27 and 28 feb in areas…
- HYDROPAC 131/24 · Nav aids2024-01-12 → 2024-01-15NAVTEX station otaru (j) 43-19.50N 140-26.80E off air
- USGS-US6000M2NY · Quakes2024-01-09 → 2024-01-1253 km wsw of sado, japan
- USGS-US6000M0YA · Quakes2024-01-01 → 2024-01-0454 km ne of anamizu, japan
- USGS-US6000M0Y9 · Quakes2024-01-01 → 2024-01-0456 km ne of anamizu, japan
- HYDROPAC 5/24 · Quakes2024-01-01 → 2024-01-01Earthquake with preliminary magnitude of 7.4 occurred in 37-30.00N 137-12.00E
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.