WWJP73 RJTD 081200 IMPORTANT WARNING FOR YOKOHAMA NAVTEX AREA 081200UTC ISSUED AT 081500UTC STNR FRONT FM 33N 170E TO 32N 168E 31N 165E 30N 162E 31N 158E 30N 154E 30N 149E WARNING(DENSE FOG) EASTERN SEA OFF SANRIKU, WESTERN SEA OFF SANRIKU, NORTHERN SEA OFF KANTO, SOUTHERN SEA OFF KANTO POOR VIS 0.3 MILES OR LESS IN PLACES NXT WARNING WILL BE ISSUED BEFORE 082100UTC =