WWJP75 RJTD 150600 IMPORTANT WARNING FOR KUSHIRO NAVTEX AREA 150600UTC ISSUED AT 150900UTC DEVELOPED LOW 990HPA AT 55N 150E MOV ENE 15 KT STNR FRONT FM 42N 158E TO 41N 152E 40N 147E 36N 142E 35N 137E 33N 133E WARNING(DENSE FOG) SEA EAST OF SAKHALIN, SEA OFF ABASHIRI, SOYA KAIKYO, SEA EAST OF HOKKAIDO, SEA OFF KUSHIRO, EASTERN SEA OFF SANRIKU, WESTERN SEA OFF SANRIKU POOR VIS 0.3 MILES OR LESS IN PLACES NXT WARNING WILL BE ISSUED BEFORE 151500UTC =