WWJP71 RJTD 231200 IMPORTANT WARNING FOR NAHA NAVTEX AREA 231200UTC ISSUED AT 231500UTC PRESSURE GRADIENT IS STEEP WARNING(NEAR GALE) NORTHERN SEA OFF SHIKOKU WARNING(DENSE FOG) SEA WEST OF NAGASAKI, SEA SOUTHWEST OF MESHIMA, SOUTHERN PART OF EAST CHINA SEA POOR VIS 0.3 MILES OR LESS IN PLACES NXT WARNING WILL BE ISSUED BEFORE 232100UTC =