| Call sign ID code | Name (in Japanese) | Period | GT | Org. code | |
|---|---|---|---|---|---|
| start | end | ||||
| JRPG | Kaiyo (かいよう) | 1985/05 | active | 2893 | 36000 |
| Call sign ID code | Name (in Japanese) | Period | GT | Org. code | |
|---|---|---|---|---|---|
| start | end | ||||
| 7JIA | Tottori No.1 (第一鳥取丸) | 1981/02 | active | ||
| active | 147.87 | 49900 | |||
| 関空マリンサービス | |||||
| 1981/02 | 23100 | ||||
| 7KAB | Futami No.6 (第六双美丸) | 1975/08 | 1976/10 | 49900 | |
| 深田サルベージ株 | |||||
| 8JDG | 1963/06 | 1991 | 257 | ||
| Tansei (淡青丸) | 1963/06 | 1982/09 | 10006 | ||
| Kaiko No.10 (第十海工丸) | 1991 | 49900 | |||
| 株オフショア・オペレーション | |||||
| 8LXK | 1984/04 | active | 200 | ||
| Taikei No.2 (第二大慶丸) | active | 49900 | |||
| 大慶漁業 | |||||
| Iwaki (いわき丸) | 1984/04 | 20700 | |||
| JCMU | Samurai (さむらい) | 1978/06 | 1981/08 | 49900 | |
| JHLO | Ogasawara (おがさわら丸) | 1997/02 | active | 6679 | 49900 |
| 小笠原海運 | |||||
| JI3166 | Hayate (はやて) | 1971/03 | active | 39.37 | |
| active | 49900 | ||||
| 日本海洋資源開発株 | |||||
| 1971/03 | 22700 | ||||
| JIKA | 1978/07 | active | |||
| Yaizu (やいづ) | 1978/07 | 1991/02 | 432 | 11021 | |
| Wakashio (若潮丸) | 1993 | active | 320 | 49000 | |
| 有ニッサルマリン | |||||
| JMOE | Geiyo (鯨洋丸) | 1945/08 | 49900 | ||
| 遠洋捕鯨株 | |||||
| JNQN | 1967/03 | 1996 | 3225 | ||
| Sogen (蒼玄丸) | 1989/05 | 1996 | 49000 | ||
| 海洋バイオテクノロジー研究所 | |||||
| Hakuho (白鳳丸) | 1967/03 | 1989/04 | 10006 | ||