| Organization/Instutution | Abbreviation | Ship name | Call sign | From | To | Gross tonnage | Ship type/Note |
|---|---|---|---|---|---|---|---|
| Tohoku National Fisheries Research Institute (TNFRI) | ASAH | ASAHI MARU No.1 | JBET | Dec. 1947 | ? | 55 | |
| WAKA | WAKATAKA MARU | JKGM | Mar. 1960 | ? | 83 | Fisheries Research Vessel | |
| JGWV | Mar. 1970 | ? | 143 | ||||
| JQIX | Mar. 1995 | In Service | 692 | ||||
| Hokkaido National Fisheries Research Institute (HNF) | HOKO | HOKKO MARU | JLZI | May 1960 | ? | 220 | Fisheries Research Vessel |
| 8LRY | Jun. 1976 | In Service | 466 | ||||
| TANK | TANKAI MARU | 8KCI | Mar. 1964 | ? | 102 | Fisheries Research Vessel | |
| 7LAY | Mar. 1982 | ? | 168 | ||||
| 7LAY | Aug. 1994 | In Service | 168 | ||||
| Minstry of Agriculture and Forestry (1925 - 1944) Tokai National Fisheries Research Institute (1944 - ?) |
SOYO | SOYO MARU | JAZB | Jan. 1925 | ? | 202 | Research Vessel |
| Tokai National Fisheries Research Institute | JHVP | Dec. 1954 | ? | 257 | |||
|
Tokai National Fisheries Research Institute (Mar. 1970 - May 1989) National Research Institute of Fisheries Science (NRIFS) (May 1989 -) |
JCDF | Mar. 1970 | Sep. 1994 | 494 | |||
| National Research Institute of Fisheries Science (NRIFS) | JGKL | Oct. 1994 | In Service | 892 | |||
| National Research Institute of Far Seas Fisheries (NRIFSF) | SHNY | SHUNYO MARU | JDVF | Feb. 1957 | ? | 183 | Fisheries Research Vessel |
| 8JIF | Mar. 1973 | In Service | 396 | ||||
| Fisheries Agency of Japan (JFA) | KAIY | KAIYO MARU | JNVF | Sep. 1967 | Jul. 1991 | 2539 | |
| JNZL | Jul. 1991 | In Service | 2630 | ||||
| SHOY | SHOYO MARU | JQYL | Jun. 1956 | ? | 602 | ||
| JDRD | Mar. 1974 | ? | 1362 | ||||
| JLOJ | May 1998 | In Service | 2118 | ||||
| National Fisheries University (NFU) | KOYO | KOYO MARU | JHAB | Sep. 1958 | Jun. 1978 | 1215 | Training Ship |
| JHPO | Jun. 1978 | In Service | 1988 | ||||
| TENY | TENYO MARU | 8KQQ | Apr. 1964 | ? | 518 | Training Ship | |
| JIFH | May 1985 | In Service | 716 | ||||
| Organization/Instutution | Abbreviation | Ship name | Call sign | From | To | Gross tonnage | Ship type/Note |
| Hokkaido Prefectural Fisheries Experimental Station: Kushiro | HKHS | HOKUSHIN MARU | JCPV | Mar. 1968 | ? | 219 | |
| 7LQV | Jan. 1989 | In Service | 214 | ||||
| Aomori Prefectural Fisheries Experimental Station | AMKU | KAIUN MARU | JRWN | Sep. 1978 | ? | 299 | |
| JRFC | Feb. 1994 | In Service | 208 | ||||
| AMKY | KOYO MARU | 7JCA | Jul. 1962 | ? | 121 | ||
| AMTO | TOO MARU | ? | Oct. 1959 | ? | 38 | ||
| JNSX | Jun. 1974 | ? | 134 | ||||
| JIWQ | FEb. 1990 | In Service | 140 | ||||
| AMZO | ZUIYO MARU | ? | Oct. 1966 | ? | 40 | ||
| Iwate Prefectural Fisheries Experimental Station | ITIT | IWATE MARU | JQOH | Feb. 1929 | ? | 145 | |
| JFUA | Feb. 1953 | ? | 245 | ||||
| JGON | Oct. 1960 | ? | 378 | ||||
| JQZW | Dec. 1972 | ? | 242 | ||||
| JMLV | Dec. 1979 | ? | 117 | former KITAKAMI MARU | |||
| Iwate Fisheries Technology Center | JJOY | Mar. 1990 | In Service | 158 | |||
| Iwate Prefectural Fisheries Experimental Station | ITKK | KITAKAMI MARU | JFQA | Jun. 1951 | ? | 61 | |
| JRQV | Nov. 1959 | ? | 104 | ||||
| JMLV | Jun. 1976 | Dec. 1979 | 117 | change to IWATE MARU | |||
| JE2575 | Jan. 1980 | ? | 47 | ||||
| Iwate Fisheries Technology Center | JE3106 | Jan. 1995 | In Service | 59 | |||
| Iwate Prefectural Fisheries Experimental Station | ITHC | HAYACHINE MARU | JRLQ | Oct. 1958 | ? | 38 | |
| Miyagi Prefectural Fisheries Experimental Station | MGKY | KAIYO | ? | ? | ? | ? | |
| MGDT | SHIN DAITO MARU | 8JTW | Oct. 1979 | In Service | 145 | ||
| MGDT | DAITO MARU | ? | ? | ? | ? | ||
| MGSH | SINSHUN MARU | JCEA | Jan. 1966 | ? | 88 | ||
| MGMG | MIYAGI MARU | JAUG | Feb. 1934 | ? | 248 | ||
| MGMB | SHIN MIYAGI MARU | 8JUJ | Dec. 1963 | ? | 417 | ||
| MGUT | UMITAKA | ? | ? | ? | ? | ||
| Fukushima Prefectural Fisheries Experimental Station | FSKS | KYOSEI MARU | JMII | Apr. 1948 | ? | 128.00 | change to IWAKI MARU |
| FSIW | IWAKI MARU | JMII | Sep. 1954 | ? | 128.00 | former KYOSEI MARU | |
| ? | Mar. 1955 | ? | 475.00 | ||||
| JCIO | Mar. 1969 | ? | 220.09 | ||||
| 8LXK | Apr. 1984 | In Service | 200.00 | ||||
| FSAZ | AZUMA | 7JFG | May 1961 | ? | 30.03 | ||
| ? | Sep. 1969 | ? | 25.48 | ||||
| JE2556 | Feb. 1980 | ? | 56.45 | JE3128 | Jan. 1995 | In Service | 50 |
| FSTS | TAKUSUI | ? | Mar. 1955 | ? | 4.9 | Coastal Fisheries Research Vessel | |
| ? | Feb. 1967 | ? | 11.68 | ||||
| ? | Aug. 1972 | ? | 14.73 | ||||
| ? | Mar. 1981 | ? | 39.21 | ||||
| JE3148 | Feb. 1997 | In Service | 30.00 | ||||
| Akita Prefectural Fisheries Experimental Station | AKSS | SENSYU MARU | JGSW | Jul. 1959 | ? | 64 | |
| JELP | Mar. 1968 | ? | 117 | ||||
| JKAW | May 1980 | ? | 197 | ||||
| Akita Prefectural Fisheries Research and Management Center | JKNP | Jul. 1997 | In Service | 187 | |||
| Ibaraki Prefectural Fisheries Experimental Station | IGIG | IBARAKI MARU | JPQB | Jun. 1927 | ? | 71 | |
| JKSI | May 1948 | ? | 116 | ||||
| IGHG | HEIWA IBARAKI MARU | JDGP | Oct. 1953 | ? | 57 | ||
| IGTW | TOKIWA | ? | Mar. 1959 | ? | 25 | ||
| JG2140 | Jan. 1971 | ? | 50 | ||||
| JG4091 | Mar. 1982 | ? | 59 | ||||
| JG5110 | Feb. 1995 | In Service | 59 | ||||
| IGMT | MITO MARU | 7LVP | Aug. 1962 | ? | 150 | ||
| JRRS | Jun. 1974 | ? | 262 | JEAE | Mar. 1986 | In Service | 179 |
| Chiba Prefectural Fisheries Experimental Station | CBCH | CHIBA MARU | JFPI | Oct. 1949 | ? | 36 | |
| 7LYI | May 1965 | ? | 425 | ||||
| JLGA | Apr. 1978 | ? | 347 | ||||
| JPVV | Feb. 1992 | In Service | 317 | ||||
| CBCB | CHIBA MARU No.2 | JPGV | Aug. 1957 | ? | 85 | ||
| JGLG | May 1967 | ? | 118 | ||||
| JPTT | Dec. 1980 | ? | 139 | ||||
| CBKE | KYOEI MARU | ? | ? | ? | ? | ||
| Kanagawa Prefectural Fisheries Experimental Station | KNES | ENOSHIMA MARU | 7LUB | Mar. 1962 | ? | 78 | |
| JEOO | Nov. 1969 | ? | 82 | ||||
| JRPM | Feb. 1985 | In Service | 99 | ||||
| Shizuoka Prefectural Fisheries Experimental Station | SOSG | SURUGA MARU | JAGT | Oct. 1957 | ? | 58 | |
| JEGF | Apr. 1967 | ? | 87 | ||||
| JIIQ | May 1978 | ? | 129 | ||||
| JEGP | Mar. 1995 | In Service | 134 | ||||
| SOFJ | FUJI MARU | JCFA | May 1927 | ? | 182 | ||
| JIPI | Oct. 1950 | 1962 | 191 | ||||
| JCRM | Jul. 1973 | ? | 491 | ||||
| JHOK | Feb. 1988 | In Service | 311 | ||||
| Organization/Instutution | Abbreviation | Ship name | Call sign | From | To | Gross tonnage | Ship type/Note |
| Tokai University | OTKD | TOKAI DAIGAKU MARU II | JECO | Jan. 1968 | 1993 | 702 | |
| Office of Education, Hokkaido Government | HKWT | WAKATAKE MARU | JHEU | Feb. 1971 | ? | 494 | |
| JDVE | Mar. 1984 | ? | 424 | ||||
| JLOV | Feb. 1997 | In Service | 666 | ||||
| Miyako Fisheries High School | ITMK | MIYAKO MARU | JBKA | May 1957 | ? | 84 | |
| JBEQ | Jan. 1966 | ? | 201 | ||||
| Kuji Fisheries High School | ITKJ | KUJI MARU | ? | Mar. 1963 | ? | 40 | |
| Hirota Fisheries High School | ITHT | HIROTA MARU | 8KRP | Mar. 1960 | ? | 33 | |
| Awa Fisheries High School | CBCS | CHISHIO MARU | JFYV | May 1955 | ? | 88 | |
| 7LYK | Mar. 1965 | ? | 185 | ||||
| JLFA | May 1975 | ? | 465 | ||||
| JPVR | Mar. 1989 | In Service | 475 | ||||
| CBWK | WAKACHIBA MARU | JKZQ | Mar. 1970 | ? | 483 | ||
| JLHB | Mar. 1980 | ? | 471 | ||||
| Oshima Minami High School | TKOS | OSHIMA MARU | JFRB | Feb. 1959 | ? | 83 | |
| JBOR | Jan. 1970 | ? | 277 | ||||
| JHAA | Mar. 1996 | In Service | 497 | ||||
| Tokushima Fisheries High School | TSAS | ASHU MARU | JNAV | Mar. 1955 | ? | 342 | |
| 8LUY | Mar. 1965 | ? | 399 | ||||
| JIJY | Mar. 1992 | In Service | 459 | ||||
| TSAS | ASHU MARU No.2 | JFVX | Mar. 1960 | ? | 95 | ||
| Organization/Instutution | Abbreviation | Ship name | Call sign | From | To | Gross tonnage | Ship type/Note |
| Japan Marine Fishery Resources Research Center | ORSY | RYUSYO MARU | ? | ? | ? | ? | |
| Chartered Ships | AMYU | YURYO MARU No.8 | ? | ? | ? | ? | |
| MGSS | SEISEI MARU No.1 | ? | ? | ? | 99 | ||
| MGSE | SHIN-EI MARU No.22 | ? | ? | ? | 84 | ||
| MGKS | KYOSYOU MARU No.3 | ? | ? | ? | 75 | ||
| MGHK | HAKURYU MARU No.18 | JPHB | Nov. 1960 | ? | 84 | ||
| MGIS | AIOI MARU No.5 | JHVS | Jan. 1955 | ? | 84 | ||
| MGKT | KATORI MARU No.7 | JNNU | Oct. 1955 | ? | 47 | ||
| MGUM | UME MARU No.3 | JLJA | Mar. 1956 | ? | 80 | ||
| ICHY | HIYOSHI MARU | ? | ? | ? | ? | ||
| MGHR | HACHIRYU MARU No.13 | ? | ? | ? | 70 | ||
| MGSK | SEIKOU MARU No.8 | ? | ? | ? | 50 | ||
| SANY | SANYO MARU No.1 | ? | ? | ? | ? | ||
| FSYS | YOSHI MARU NO.18 | ? | ? | ? | ? | ||
| MGHY | HOYO MARU No.12 | ? | ? | ? | ? | ||
| KASO | BAISHO MARU | ? | ? | ? | ? |