Latitudes and Longitudes
| Seaport Name | Seaport Code | Country | Latitude | Longitude |
|---|---|---|---|---|
| Wakayama | JPHIK | Japan | 34°13'N | 135°07'E |
| Hakodate | JPHKD | Japan | 41°47'N | 140°41'E |
| Sakaide | JPSKD | Japan | 34°19'N | 133°50'E |
| Uraga | JPKRH | Japan | 35°13'N | 139°42'E |
| Matsuyama | JPMYJ | Japan | 33°52'N | 132°41'E |
| Ube | JPUBJ | Japan | 33°56'N | 131°14'E |
| Kikuma | JPKIK | Japan | 34°03'N | 132°50'E |
| Tsuruga | JPTRG | Japan | 35°40'N | 136°03'E |
| Imahuru | JPIMU | Japan | 34°04'N | 133°00'E |
| Toyama | JPFSK | Japan | 36°46'N | 137°13'E |
| Imabari | JPIMU | Japan | 34°04'N | 133°00'E |
| Tokyo | JPOGA | Japan | 35°14'N | 139°45'E |
| Okinawa | CNKWN | Japan | 26°22'N | 127°57'E |
| Tokuyama | JPTKY | Japan | 34°02'N | 131°47'E |
| Nishihara | JPNHR | Japan | 26°14'N | 127°50'E |
| Takasago | JPTSG | Japan | 34°44'N | 134°47'E |
| Naha | JPNAH | Japan | 26°12'N | 127°39'E |
| Shimonoseki | JPSHS | Japan | 33°57'N | 130°57'E |
| Kin Wan | CNKWN | Japan | 26°22'N | 127°57'E |
| Shimizu | JPSMZ | Japan | 35°01'N | 138°30'E |