Latitudes and Longitudes
| Seaport Name | Seaport Code | Country | Latitude | Longitude |
|---|---|---|---|---|
| Matsue | JPMAY | Japan | 35°27'N | 133°07'E |
| Hakata | JPHKT | Japan | 33°36'N | 130°23'E |
| Kurihama | JPKRH | Japan | 35°13'N | 139°42'E |
| Fukuoka | JPFUT | Japan | 33°36'N | 130°23'E |
| Kure | JPKRE | Japan | 34°14'N | 132°31'E |
| Beppu | JPBPU | Japan | 33°17'N | 131°39'E |
| Kudamatsu | JPKUD | Japan | 34°00'N | 131°51'E |
| Kashima | JPKSM | Japan | 35°54'N | 140°01'E |
| Amamioshima | JPASJ | Japan | 31°35'N | 130°32'E |
| Kozaki | JPTRG | Japan | 35°40'N | 136°03'E |
| Kanokawa | JPKKW | Japan | 34°11'N | 132°26'E |
| Yokosuka | JPYOS | Japan | 35°17'N | 139°39'E |
| Kobe | JPUKB | Japan | 34°40'N | 135°11'E |
| Iyomishima | JPIYM | Japan | 34°16'N | 133°00'E |
| Yokoshima | JPYKS | Japan | 35°40'N | 139°18'E |
| Kawasaki | JPKWS | Japan | 35°32'N | 139°45'E |
| Iwakuni | JPIWK | Japan | 34°10'N | 132°13'E |
| Yokohama | JPYOK | Japan | 35°27'N | 139°37'E |
| Hiroshima | JPAKT | Japan | 34°20'N | 132°24'E |
| Yokkaichi | JPYKK | Japan | 34°57'N | 136°37'E |