Keishiro Azami, Tokio Doshita, Kanta Koyama, Shiki Machida, Kentaro Nakamura, Yasuhiro Kato, Etsuo Uchida. Formation of hydrothermal ferromanganese oxides in the Daini-Nishi-Yamato Seamount, Sea of Japan: Do they really contain critical-metal particles?. Ore Geology Reviews. 2024
Keishiro Azami, Kanta Koyama, Shiki Machida, Kyoko Okino, Kazutaka Yasukawa, Yasuhiro Kato, Etsuo Uchida. Formation of hydrothermal ferromanganese oxides from the Daigo-Kume Knoll in the middle Okinawa Trough, Japan. Marine Geology. 2023. 463. 107117-107117
Keishiro Azami, Shiki Machida, Naoto Hirano, Kentaro Nakamura, Kazutaka Yasukawa, Tetsu Kogiso, Masao Nakanishi, Yasuhiro Kato. Hydrothermal ferromanganese oxides around a petit-spot volcano on old and cold oceanic crust. Communications Earth & Environment. 2023. 4. 1
Kazutaka Yasukawa, Yasuhiro Kato. Geochemistry of ferromanganese nodules in the soil of Okinawa Island, Japan: Paleoclimatic implications and discrimination scheme of the nodule origins. Journal of Asian Earth Sciences: X. 2022. 8. 100127-100127
Keishiro Azami, Naoto Hirano, Jun-Ichi Kimura, Qing Chang, Hirochika Sumino, Shiki Machida, Kazutaka Yasukawa, Yasuhiro Kato. 87Sr/86Sr Isotopic Ratio of Ferromanganese Crusts as a Record of Detrital Influx to the Western North Pacific Ocean. Minerals. 2022. 12. 8. 943-943