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
93
97
98
99
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
By month (all years)
J
F
M
A
M
J
J
A
S
O
N
D
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 2770/21 · Missiles2021-09-30 → 2021-10-09Missile operations 2100Z to 1000Z daily 04 and 08 oct in area bound by 42-27-36N 131-11-24E, 42-29-30N…
- HYDROPAC 2768/21 · Missiles2021-09-30 → 2021-10-01Missile operations 2100Z to 1000Z daily 03 thru 08 oct in area bound by 41-12.0N 131-21.5E, 42-10.0N…
- USGS-US6000FQ2D · Quakes2021-09-29 → 2021-10-02243 km nnw of nanao, japan
- HYDROPAC 2704/21 · Missiles2021-09-23 → 2021-10-02Missile operations 2100Z to 1000Z daily 27 sep thru 01 oct in area bound by 42-18.1N 132-34.9E, 42-19.7N…
- HYDROPAC 2676/21 · Exercises2021-09-20 → 2021-09-26Torpedo exercises 221400Z to 261359Z sep in area bound by 41-35.8N 131-12.0E, 42-30.0N 131-12.0E, 42-30.0N…
- HYDROPAC 2550/21 · Exercises2021-09-09 → 2021-09-18Gunnery exercises 2100Z to 1000Z daily 14 thru 17 sep in area bound by 42-40.0N 131-41.0E, 42-40.0N…
- HYDROPAC 2494/21 · Missiles2021-09-02 → 2021-09-11Missile operations 2100Z to 1000Z daily 06 thru 10 sep in area bound by 42-27.6N 131-11.4E, 42-40.5N…
- HYDROPAC 2345/21 · Missiles2021-08-16 → 2021-08-26Missile operations 2100Z to 1000Z daily 20 and 22 thru 25 aug in area bound by 42-18.1N 132-34.9E, 42-19.7N…
- HYDROPAC 2337/21 · Exercises2021-08-15 → 2021-08-27Russia DNC 23, DNC 24
- HYDROPAC 2289/21 · Exercises2021-08-09 → 2021-08-17Russia DNC 23, DNC 24
- HYDROPAC 2288/21 · Exercises2021-08-09 → 2021-08-20Hazardous operations 2100Z to 1000Z daily 11 thru 13 and 15 thru 19 aug in area bound by 42-18.1N 132-34.9E,…
- HYDROPAC 2227/21 · Exercises2021-08-04 → 2021-08-11Russia DNC 23, DNC 24
- HYDROPAC 1971/21 · Exercises2021-07-07 → 2021-07-17Russia DNC 23, DNC 24
- HYDROPAC 1953/21 · Missiles2021-07-05 → 2021-07-10Missile operations 0001Z to 0800Z daily 09 and 10 jul in area bound by 42-00N 133-10E, 42-20N 133-10E,…
- HYDROPAC 1947/21 · Missiles2021-07-02 → 2021-07-03Missile operations 2100Z to 1000Z daily 06 thru 08 jul in area bound by 41-25N 132-25E, 41-25N 136-20E,…
- HYDROPAC 1940/21 · Missiles2021-07-02 → 2021-07-09Missile operations 2100Z to 1000Z daily 06 thru 08 jul in area bound by 41-25N 132-25E, 41-25N 136-20E,…
- HYDROPAC 1895/21 · Exercises2021-06-26 → 2021-07-01Gunnery exercises 2300Z to 0800Z daily 29 and 30 jun in area bound by 42-56-42N 131-31-36E, 43-04-00N…
- HYDROPAC 1894/21 · Other2021-06-26 → 2021-07-31Bombing exercises 2300Z to 1500Z daily 30 jun thru 02 jul, 04 thru 09, 11 thru 16, 18 thru 23 and 25 thru 30…
- HYDROPAC 1893/21 · Exercises2021-06-26 → 2021-06-30Gunnery exercises 2300Z to 1000Z daily 27 thru 29 jun in area bound by 42-40.0N 131-41.0E, 42-40.0N…
- HYDROPAC 1868/21 · Surveys2021-06-25 → 2021-06-30Underwater operations 251400Z to 301400Z jun in area bound by 43-04.0N 134-27.6E, 43-04.0N 134-42.2E,…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.