WWJP74 RJTD 171800 IMPORTANT WARNING FOR OTARU NAVTEX AREA 171800UTC ISSUED AT 172100UTC DEVELOPING LOW 1010HPA AT 38N 148E MOV ENE 25 KT WARNING(NEAR GALE) SOYA KAIKYO, SEA WEST OF HOKKAIDO, SEA OFF HIYAMA AND TSUGARU WARNING(ICING) SEA WEST OF SAKHALIN, SOYA KAIKYO, SEA WEST OF HOKKAIDO NXT WARNING WILL BE ISSUED BEFORE 180300UTC =