WWJP74 RJTD 041200 IMPORTANT WARNING FOR OTARU NAVTEX AREA 041200UTC ISSUED AT 041500UTC PRESSURE GRADIENT IS STEEP WARNING(NEAR GALE) SEA OFF SOUTHERN COAST OF MARITIME PROVINCE WARNING(DENSE FOG) SEA WEST OF SAKHALIN, SOYA KAIKYO, SEA WEST OF HOKKAIDO, TSUGARU KAIKYO, 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 042100UTC =