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

Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.