WWJP73 RJTD 061200 IMPORTANT WARNING FOR YOKOHAMA NAVTEX AREA 061200UTC ISSUED AT 061500UTC PRESSURE GRADIENT IS STEEP WARNING(NEAR GALE) EASTERN SEA OFF SANRIKU, WESTERN SEA OFF SANRIKU, NORTHERN SEA OFF KANTO, SOUTHERN SEA OFF KANTO, EASTERN SEA OFF TOKAI 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 062100UTC =