WWJP74 RJTD 040600 IMPORTANT WARNING FOR OTARU NAVTEX AREA 040600UTC ISSUED AT 040900UTC PRESSURE GRADIENT IS STEEP WARNING(NEAR GALE) SEA WEST OF SAKHALIN, SOYA KAIKYO, SEA WEST OF HOKKAIDO WARNING(DENSE FOG) SEA WEST OF SAKHALIN, SEA WEST OF HOKKAIDO, SEA OFF SOUTHERN COAST OF MARITIME PROVINCE, SEA OFF NOTO POOR VIS 0.3 MILES OR LESS IN PLACES NXT WARNING WILL BE ISSUED BEFORE 041500UTC =