K. Kawai, K. Nakashima, K. Yasutomi and N. Otaka 2024. Estimation of Drain Pipe Effects Using Electrical Prospecting and Unsaturated Soil/Water Coupled Analysis. Geotechnical Engineering Journal of the SEAGS & AGSSEA . 53, 2 (Sep. 2024), 43–50. DOI:https://doi.org/10.14456/seagj.2022.17.