North Korea Informs Neighboring Nations of Planned Naval Combat Drill

(CNN) -- North Korea is warning the world to stay out of part of its eastern waters for 16 days, starting Thursday, saying it will hold a military drill, Japanese officials said.

North Korea's hydrographic department e-mailed Japan's coast guard Monday, according to coast guard spokesman Shinya Suzuki. Japan monitors that part of the region's waters.

North Korea plans to hold military shooting practice in the waters northeast of Wonsan, on the country's eastern coast, from June 25 to July 10, according to the e-mail, Suzuki said.

The reclusive communist nation did not specify consequences of ships entering those waters during the drill, but the dates fall within the timeframe cited by Japanese media last week for a possible North Korea missile launch toward Hawaii.