This chapter documents the methods used for shipboard measurements and analyses during International Ocean Discovery Program (IODP) Expedition 365. All are closely based on earlier Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) expeditions (i.e., Integrated Ocean Drilling Program Expeditions 315 [Expedition 315 Scientists, 2009], 316 [Expedition 316 Scientists, 2009], 319 [Expedition 319 Scientists, 2010], 322 [Expedition 322 Scientists, 2010], 332, [Expedition 332 Scientists, 2011], 333 [Expedition 333 Scientists, 2012], 338 [Strasser et al., 2014], and 348 [Tobin et al., 2015]).