*Takehi Isse¹, Kiyoshi Baba¹, Ban-Yuan Kuo², PeiYing Patty Lin³, Wu-Cheng Chi², Chen-Hsiang Hung³, Ding-Jiun Lin⁴, Hogyum Kim⁵, Nozomu Takeuchi¹, Hitoshi Kawakatsu^1,2, Hajime Shiobara¹, Hisashi Utada¹, onboard scientists of 2022/2023 Oldest-2 cruises by R/V Legend - (1.Earthquake Research Institute University of Tokyo, 2.Institute of Earth Sciences, Academia Sinica, 3.National Taiwan Normal University, 4.National Central University, 5.Seoul National University)

*Kiyoshi Baba¹, Hisashi Utada¹, Jun Korenaga² (1.Earthquake Research Institute, The University of Tokyo, 2.Department of Earth and Planetary Sciences, Yale University)

*Oishi Tatsuto¹, Takao Koyama¹, Makoto Uyeshima¹, Kiyoshi Baba¹, Yoshiya Usui¹, Noriko Tada², Satoru Tanaka² (1.Earthquake Research Insititute, the University of Tokyo, 2.Japan Agency for Marine-Earth Science and Technology)

*Ding-Jiun Lin¹, Ping-Yu Chang¹, Kiyoshi Baba², Jordi Mahardika Puntu¹, Haiyina Hasbia Amania¹ (1.Department of Earth Sciences, National Central University, Taiwan, 2.Earthquake Research Institute, University of Tokyo, Japan)