Hydrographic Observations on board Research Vessels

Hydrographic observations are conducted in the seas adjacent to Japan and in the western North Pacific on board five vessels: the Ryofu Maru (operated by Global Environment and Marine Department at the Headquarters), the Keifu Maru (Kobe Marine Observatory), the Kofu Maru (Hakodate Marine Observatory), the Chofu Maru (Nagasaki Marine Observatory) and the Seifu Maru (Maizuru Marine Observatory). The Shumpu Maru of Kobe Marine Observatory was retired in 2001.

Hydrographic Data

Summary of Hydrographic Observations

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Kofu Maru

CodeCruise Number
KO 6502, 6504, 6505, 6507, 6510, 6512, 6602, 6604, 6606, 6608,
6609, 6611, 6702, 6705, 6707, 6710, 6711, 6802, 6804, 6806,
6810, 6812, 6902, 6904, 6907, 6910, 7002, 7004, 7007, 7010,
7012, 7102, 7104, 7107, 7110, 7111, 7202, 7204, 7207, 7208,
7210, 7211, 7302, 7304, 7306, 7307, 7310, 7311, 7402, 7404,
7405, 7407, 7408, 7411, 7502, 7504, 7507, 7508, 7510, 7511,
7602, 7604, 7607, 7608, 7610, 7611, 7702, 7704, 7705, 7706,
7707, 7709, 7711, 7802, 7804, 7807, 7808, 7810, 7902, 7904,
7906, 7907, 7910, 8002, 8004, 8007, 8008, 8010, 8102, 8104,
8106, 8108, 8110, 8202, 8204, 8205, 8207, 8209, 8302, 8304,
8306, 8308, 8310, 8402, 8404, 8406, 8408, 8410, 8502, 8504,
8507, 8508, 8510, 8602, 8604, 8606, 8608, 8610, 8702, 8704,
8707, 8708, 8710, 8802, 8804, 8808, 8810, 8902, 8904, 8908
8910, 8911, 9002, 9004, 9005, 9006, 9010, 9102, 9104, 9107,
9108, 9110, 9202, 9204, 9207, 9210, 9302, 9304, 9306, 9307,
9310, 9402, 9404, 9406, 9407, 9410, 9411, 9502, 9504, 9506,
9507, 9510, 9511, 9601, 9604, 9606, 9607, 9610, 9611, 9701,
9704, 9706, 9707, 9710, 9711, 9801, 9804, 9806, 9810, 9811,
9901, 9904, 9906, 9909, 9911, 0002, 0004, 0006, 0009, 0011,
0101, 0104, 0106, 0109, 0111
KH 0201, 0204, 0206, 0210, 0211, 0301, 0304, 0306, 0310, 0401,
0404, 0406, 0410, 0501, 0504, 0506, 0510, 0601, 0604, 0606,
0610, 0701, 0704, 0706, 0710, 0801, 0804, 0806, 0810

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Ryofu Maru

CodeCruise Number
RY 6501, 6504, 6507, 6602, 6604, 6609, 6611, 6701, 6705, 6706,
6710, 6801, 6805, 6810, 6901, 6905, 6910, 7001, 7006, 7007,
7009, 7010, 7101, 7110, 7111, 7201, 7204, 7206, 7210, 7301,
7304, 7306, 7311, 7401, 7404, 7406, 7410, 7501, 7503, 7504,
7506, 7510, 7601, 7604, 7606, 7610, 7701, 7704, 7706, 7710,
7801, 7804, 7806, 7810, 7901, 7906, 7909, 7910, 8001, 8003,
8004, 8006, 8009, 8010, 8011, 8101, 8104, 8106, 8109, 8110,
8111, 8201, 8204, 8206, 8210, 8301, 8304, 8306, 8310, 8401,
8404, 8406, 8410, 8411, 8501, 8504, 8506, 8510, 8601, 8604,
8606, 8610, 8611, 8701, 8704, 8706, 8710, 8801, 8804, 8806,
8810, 8901, 8904, 8906, 8910, 8911, 9001, 9003, 9004, 9006,
9009, 9010, 9011, 9101, 9104, 9106, 9110, 9111, 9201, 9204,
9206, 9210, 9301, 9304, 9306, 9310, 9401, 9405, 9407, 9411,
9501
RF 9507, 9508, 9511, 9601, 9604, 9607, 9610, 9701, 9704, 9705,
9709, 9801, 9804, 9806, 9809, 9901, 9904, 9906, 9909, 0001,
0004, 0006, 0009, 0101, 0104, 0106, 0110, 0201, 0204, 0206,
0210, 0301, 0304, 0306, 0310, 0401, 0404, 0406, 0410, 0501,
0504, 0506, 0510, 0601, 0604, 0606, 0610, 0701, 0704, 0706,
0710, 0801, 0804, 0806, 0811

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Keifu Maru

Code Cruise Number
KE 8802, 8804, 8805, 8901, 8902, 8904, 8906, 9005, 9006, 9008,
9103, 9104, 9105, 9108, 9201, 9203, 9204, 9205, 9210, 9305,
9306, 9308, 9310, 9401, 9404, 9405, 9406, 9408, 9410, 9501,
9504, 9506, 9508, 9510, 9601, 9604, 9605, 9608, 9610, 9701,
9704, 9705, 9708, 9710, 9801, 9804, 9806, 9808, 9810, 9901,
9904, 9906, 9908, 9910, 0001, 0004
KS 0010, 0101, 0105, 0107, 0111, 0201, 0204, 0206, 0210, 0301,
0304, 0306, 0310, 0401, 0404, 0406, 0411, 0501, 0504, 0506,
0511, 0601, 0604, 0606, 0610, 0701, 0704, 0707, 0710, 0801,
0804, 0806, 0810

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Shumpu Maru

Code Cruise Number
SU 6502, 6504, 6507, 6510, 6602, 6605, 6607, 6610, 6702, 6704,
6707, 6710, 6802, 6805, 6807, 6810, 6902, 6905, 6907, 6910,
7002, 7005, 7007, 7010, 7104, 7107, 7108, 7110, 7111, 7202,
7204, 7205, 7206, 7207, 7208, 7210, 7211, 7212
SH 7301, 7302, 7305, 7306, 7307, 7308, 7310, 7401, 7404, 7405,
7407, 7409, 7411, 7502, 7505, 7507, 7508, 7509, 7602, 7605,
7607, 7608, 7609, 7701, 7705, 7707, 7708, 7709, 7802, 7804,
7807, 7808, 7809, 7902, 7904, 7907, 7908, 7909, 8002, 8004,
8007, 8008, 8009, 8101, 8104, 8107, 8108, 8109, 8202, 8204,
8207, 8208, 8209, 8302, 8304, 8307, 8308, 8309, 8402, 8404,
8407, 8408, 8409, 8502, 8504, 8507, 8508, 8509, 8602, 8604
8607, 8609, 8702, 8704, 8707, 8709, 8802, 8804, 8807, 8809,
8902, 8904, 8907, 8908, 8909, 9002, 9004, 9007, 9008, 9009,
9102, 9104, 9107, 9108, 9109, 9202, 9204, 9207, 9209, 9302,
9304, 9305, 9307, 9309, 9402, 9404, 9407, 9409, 9504, 9506,
9508, 9510, 9601, 9604, 9606, 9608, 9610, 9701, 9704, 9706,
9708, 9710, 9801, 9804, 9806, 9808, 9810, 9901, 9904, 9906,
9908, 9910, 0001, 0004, 0006, 0008, 0009

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Chofu Maru

CodeCruise Number
TU 6501, 6504, 6507, 6509, 6510, 6601, 6603, 6604, 6606, 6607,
6608, 6612, 6701, 6703, 6704, 6705, 6707, 6708, 6710, 6801,
6802, 6804, 6806, 6807, 6810, 6901, 6903, 6904, 6905, 6906,
6907, 6910, 7001, 7004, 7008, 7010, 7102, 7104, 7107, 7110,
7201, 7203, 7204, 7206, 7207, 7210, 7211
CH 7301, 7303, 7304, 7307, 7310, 7312, 7401, 7405, 7407, 7410,
7501, 7503, 7504, 7507, 7510, 7602, 7604, 7607, 7609, 7610,
7701, 7704, 7707, 7710, 7801, 7804, 7807, 7809, 7901, 7904,
7905, 7907, 7910, 8001, 8004, 8007, 8009, 8101, 8104, 8107,
8110, 8201, 8204, 8207, 8209, 8301, 8304, 8307, 8309, 8401,
8404, 8407, 8410, 8501, 8504, 8507, 8509, 8601, 8604, 8607
8610,
NC 8703, 8704, 8707, 8709, 8801, 8804, 8807, 8809, 8810, 8901,
8904, 8907, 8910, 8911, 9001, 9004, 9007, 9010, 9101, 9104,
9107, 9110, 9201, 9204, 9207, 9210, 9301, 9304, 9307, 9310,
9401, 9404, 9407, 9410, 9501, 9504, 9506, 9510, 9511, 9601,
9604, 9606, 9610, 9611, 9701, 9704, 9706, 9710, 9711, 9801,
9804, 9806, 9810, 9811, 9901, 9904, 9906, 9910, 9911, 0001,
0004, 0006, 0009, 0011, 0101, 0104, 0106, 0110, 0111, 0201,
0204, 0206, 0210, 0211, 0301, 0304, 0306, 0310, 0401, 0404,
0406, 0410, 0501, 0504, 0506, 0509, 0601, 0604, 0606, 0609,
0701, 0704, 0706, 0709, 0801, 0804, 0807, 0809

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Seifu Maru

CodeCruise Number
SI 6405, 6408, 6410, 6502, 6505, 6506, 6508, 6511, 6602, 6605,
6607, 6608, 6702, 6706, 6707, 6708, 6710, 6802, 6806, 6807,
6810, 6902, 6905, 6907, 6910, 7002, 7007, 7010, 7102, 7105,
7107, 7110, 7202, 7205, 7207, 7210, 7211, 7302, 7303, 7305,
7307, 7309, 7311, 7312, 7402, 7403, 7405, 7407, 7408, 7410,
7411, 7502, 7503, 7505, 7506, 7507, 7508, 7509, 7510, 7602,
7605, 7607, 7609, 7610, 7702, 7705, 7706, 7707, 7709, 7802,
7805, 7806, 7807, 7808, 7810, 7902, 7905, 7907, 7909, 8002,
8005, 8007, 8009, 8102, 8105, 8107, 8109, 8202, 8205, 8207,
8209, 8302, 8305, 8307, 8309, 8402, 8405, 8407, 8409, 8502,
8505, 8507, 8509, 8602, 8605, 8607, 8609, 8702, 8705, 8707,
8709, 8801, 8805, 8807, 8809, 8902, 8905, 8907, 8909, 9002,
9005, 9007, 9009, 9102, 9105, 9107, 9109, 9202, 9205, 9207,
SM 9302, 9305, 9307, 9310, 9402, 9404, 9406, 9407, 9410, 9502,
9504, 9506, 9510, 9511, 9601, 9604, 9606, 9610, 9611, 9701,
9704, 9706, 9710, 9711, 9801, 9804, 9806, 9810, 9811, 9901,
9904, 9906, 9910, 9911, 0001, 0004, 0007, 0010, 0011, 0101,
0104, 0106, 0110, 0111, 0201, 0204, 0206, 0210, 0211, 0301,
0304, 0306, 0310, 0401, 0404, 0406, 0410, 0501, 0504, 0506,
0510, 0601, 0604, 0606, 0610, 0701, 0704, 0706, 0710, 0801,
0804, 0806, 0810

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