WWJP74 RJTD 160600 IMPORTANT WARNING FOR OTARU NAVTEX AREA 160600UTC ISSUED AT 160900UTC PRESSURE GRADIENT IS STEEP WARNING(NEAR GALE) SEA OFF SOUTHERN COAST OF MARITIME PROVINCE, SEA OFF NOTO WARNING(DENSE FOG) SEA WEST OF SAKHALIN, SOYA KAIKYO, SEA WEST OF HOKKAIDO, SEA OFF HIYAMA AND TSUGARU, SEA OFF SOUTHERN COAST OF MARITIME PROVINCE, SEA OFF AKITA POOR VIS 0.3 MILES OR LESS IN PLACES NXT WARNING WILL BE ISSUED BEFORE 161500UTC =