WWJP75 RJTD 160600 IMPORTANT WARNING FOR KUSHIRO NAVTEX AREA 160600UTC ISSUED AT 160900UTC WARNING(DENSE FOG) SEA EAST OF SAKHALIN, SEA OFF ABASHIRI, SOYA KAIKYO, SEA EAST OF HOKKAIDO, SEA OFF KUSHIRO, SEA OFF HIDAKA, WESTERN SEA OFF SANRIKU POOR VIS 0.3 MILES OR LESS IN PLACES NXT WARNING WILL BE ISSUED BEFORE 161500UTC =