WWJP74 RJTD 250000 IMPORTANT WARNING FOR OTARU NAVTEX AREA 250000UTC ISSUED AT 250300UTC DEVELOPING LOW 1006HPA AT 31N 131E MOV ENE 20 KT FCST POSITION FOR 251200UTC AT 31N 135E WITH UNCERTANITY OF 50 MILES RADIUS FCST POSITION FOR 260000UTC AT 32N 139E WITH UNCERTANITY OF 80 MILES RADIUS 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, SEA OFF SADO, SEA OFF NOTO POOR VIS 0.3 MILES OR LESS IN PLACES NXT WARNING WILL BE ISSUED BEFORE 250900UTC =