WWJP73 RJTD 071200 IMPORTANT WARNING FOR YOKOHAMA NAVTEX AREA 071200UTC ISSUED AT 071500UTC STNR FRONT FM 30N 139E TO 30N 144E 31N 149E 29N 155E 30N 161E 32N 164E 34N 166E 38N 172E 42N 176E 44N 180E WARNING(DENSE FOG) EASTERN SEA OFF SANRIKU, WESTERN SEA OFF SANRIKU, NORTHERN SEA OFF KANTO POOR VIS 0.3 MILES OR LESS IN PLACES NXT WARNING WILL BE ISSUED BEFORE 072100UTC =