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Masayasu Hisatake is a leading figure in geotechnical engineering, with a focused expertise in tunneling-induced ground displacements and excavation methods in soft ground. His research has fundamentally advanced the understanding of how tunnel face stability and surface settlements can be controlled through innovative construction techniques. Hisatake’s seminal 2007 study on the effects of pipe roof supports and excavation methods on displacements above a tunnel face, which has garnered 89 citations, remains a cornerstone reference for engineers designing urban tunnels. He further refined these principles by investigating the ring-cut excavation method, demonstrating in subsequent works (2009, 2011) how this technique effectively restrains displacements ahead of the tunnel face and serves as a powerful settlement deterrent in challenging soft ground conditions. Hisatake’s contributions have provided practical, data-driven solutions for minimizing ground disturbance during tunneling, directly impacting the safety and efficiency of underground construction in densely populated areas. His work continues to influence modern tunneling practice and is essential reading for researchers and practitioners tackling ground deformation challenges.