Latitudes and Longitudes
| Seaport Name | Seaport Code | Country | Latitude | Longitude |
|---|---|---|---|---|
| Goi | JPGOI | Japan | 35°30'N | 140°05'E |
| Matsuyama | JPMYJ | Japan | 33°52'N | 132°41'E |
| Ube | JPUBJ | Japan | 33°56'N | 131°14'E |
| Fushiki | JPFSK | Japan | 36°46'N | 137°13'E |
| Kikuma | JPKIK | Japan | 34°03'N | 132°50'E |
| Tsuruga | JPTRG | Japan | 35°40'N | 136°03'E |
| Funakawa | JPFNK | Japan | 39°53'N | 139°50'E |
| Imahuru | JPIMU | Japan | 34°04'N | 133°00'E |
| Toyama | JPFSK | Japan | 36°46'N | 137°13'E |
| Chiba | JPANE | Japan | 35°36'N | 140°06'E |
| Imabari | JPIMU | Japan | 34°04'N | 133°00'E |
| Tokyo | JPOGA | Japan | 35°14'N | 139°45'E |
| Aomori | JPAOJ | Japan | 40°49'N | 140°45'E |
| Okinawa | CNKWN | Japan | 26°22'N | 127°57'E |
| Tokuyama | JPTKY | Japan | 34°02'N | 131°47'E |
| Amagr | JPKSM | Japan | 35°54'N | 140°01'E |
| Nishihara | JPNHR | Japan | 26°14'N | 127°50'E |
| Takasago | JPTSG | Japan | 34°44'N | 134°47'E |
| Akitsu | JPAKT | Japan | 34°20'N | 132°24'E |
| Naha | JPNAH | Japan | 26°12'N | 127°39'E |