*Shunsuke Takemura¹, Suguru Yabe², Kentaro Emoto³ (1.Earthquake Research Institute, the University of Tokyo, 2.Geological survey of Japan, National Institute of Advanced Industrial Science and Technology, 3.Geophysics, Graduate School of Science, Tohoku University)

*Tatsuya Kubota¹, Tatsuhiko Saito¹, Wataru Suzuki¹ (1.National Research Institute for Earth Science and Disaster Resilience)

*Takeshi Akuhara¹ (1.Earthquake Research Institute, The University of Tokyo)

*Miyuu Uemura¹, Yoshihiro Ito², Kazuaki Ohta³, Ryota Hino⁴, Masanao Shinohara⁵ (1.Graduate School of Science, Kyoto University, 2.Disaster Prevention Research Institute, Kyoto University, 3.National Research Institute for Earth Science and Disaster Resilience, 4.Graduate School of Science, Tohoku University, 5.Earthquake Research Institute, University of Tokyo)

*Takehiro Nishiyama¹, Shuichiro Yada¹, Masaru Nakano¹, Keisuke Ariyoshi¹, Kentaro Sueki¹, Takane Hori¹, Narumi Takahashi^1,2 (1.Japan Agency for Marine-Earth Science and Technology, 2.National Research Institute for Earth Science and Disaster Resilience)

*Daisuke Suetsugu¹, Hajime Shiobara², Hiroko Sugioka³, Aki Ito¹, Takehi Isse², Yasushi Ishihara¹, Satoru Tanaka¹, Masayuki Obayashi¹, Takashi Tonegawa¹, Junko Yoshimitsu¹, Takumi Kobayashi³ (1.institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology, 2.Earthquake Research Institute, the University of Tokyo, 3.Department of Planetrology, Graduate School of Science Kobe University)

*Hajime Shiobara¹, Hisashi Utada¹, Seung-Sep Kim², YoungHee Kim³, Kiyoshi Baba¹, Takehi Isse¹, Hogyum Kim³, HyeJeong Kim¹, Hiroko Sugioka⁴, Nozomu Takeuchi¹, Yuki Kawano¹, Hitoshi Kawakatsu¹, Sang-Mook Lee³, Onboard scientists of 2018/2019 Oldest cruises (1.Ocean Hemisphere Research Center, Earthquake Research Institute, University of Tokyo, 2.Chungnam National University, 3.Seoul National University, 4.Kobe University)

*Takeshi Akuhara¹, Takeshi Tsuji², Takashi Tonegawa³ (1.Earthquake Research Institute, The University of Tokyo, 2.Kyushu University, 3.Research and Development center for Earthquake and Tsunami, JAMSTEC)

*Yuya Machida¹, Shuhei Nishida¹, Toshinori Kimura¹, Hiroyuki Matsumoto¹, Eiichiro Araki¹ (1.Japan Agency for Marine-Earth Science and Technology)

*Hidenobu Takahashi¹, Ryota Hino¹, Naoki Uchida¹, Kazuaki Ohta², Masanao Shinohara³, Ryosuke Azuma¹, Susumu Kawakubo¹ (1.Graduate school of Science Tohoku University , 2.National Research Institute for Earth Science and Disaster Resilience, 3.Earthquake Research Institute, the University of Tokyo)