1. Ground improvement

 - Development of new techniques and methods

 - Properties of cement-treated soil such as long-term stability

2. Coastal structures including quay walls, breakwaters, and seawalls

 - Behaviours of coastal structures subjected to earthquake, tsunami, high waves, and large force

 - Modelling behaviours of structures using centrifuge and numerical analysis

3. Composite problems of wave and ground

 - Deformation and failure of soil structure subjected to waves

 - Ground behaviours from microscopic point of view such as scouring

H. Takahashi, L. Zdravković, A. Tsiampousi, N. Mori (2022) Destabilisation of Seawall Ground by Ocean Waves, Geotechnique  URL/Link

H. Takahashi, S. Omori, H. Asada, H. Fukawa, Y. Gotoh, Y. Morikawa (2021) Mechanical properties of cement-treated soil mixed with cellulose nanofibre, Applied Sciences  URL/Link

H. Takahashi (2021) Stability of composite-type breakwaters reinforced by rubble embankment, Soils and Foundations  URL/Link

H. Takahashi, N. Fujii, S. Sassa (2020) Centrifuge model tests of earthquake-induced submarine landslide, International Journal of Physical Modelling in Geotechnics  URL/Link

H. Takahashi, Y. Morikawa, N. Mori, T. Yasuda (2019) Collapse of concrete-covered levee under composite effect of overflow and seepage, Soils and Foundations  URL/Link

H. Takahashi, Y. Morikawa, H. Kashima (2019) Centrifuge modelling of breaking waves and seashore ground, International Journal of Physical Modelling in Geotechnics  URL/Link

H. Takahashi, N. Fujii, Y. Morikawa, D. Takano (2019) Development of Hydro-Geotechnical Centrifuge PARI Mark II-R, Technical Note of the Port and Airport Research Institute URL/Link

H. Takahashi, Y. Morikawa, N. Fujii, M. Kitazume (2018) Thirty-seven-year investigation of quicklime-treated soil produced by deep mixing method, Ground Improvement  URL/Link

H. Takahashi, S. Sassa, Y. Morikawa, D. Takano (2017) Bearing capacity of breakwater mound under tsunami-induced seepage flow, Geotechnical Hazards from Large Earthquakes and Heavy Rainfalls  URL/Link

H. Takahashi, N. Takahashi, Y. Morikawa, I. Towhata, D. Takano (2016) Efficacy of pile-type improvement against lateral flow of liquefied ground, Geotechnique  URL/Link

H. Takahashi, S. Sassa, Y. Morikawa, D. Takano, K. Maruyama (2014) Stability of caisson-type breakwater foundation under tsunami-induced seepage, Soils and Foundations URL/Link

S. Nishimura, H. Takahashi, Y. Morikawa (2012) Observations of dynamic and non-dynamic interactions between a quay wall and partially stabilised backfill, Soils and Foundations URL/Link

H. Takahashi, T. Oohashi, H. Endoh (2011) Earthquake damage investigation of gravity-type quay walls in Ibaraki Port, Proceedings of the International Symposium on Engineering Lessons Learned from the 2011 Great East Japan Earthquake URL/Link

H. Takahashi, M. Kitazume, T. Noguchi, N. Suzuki (2011) Seismic-resistant effect of cement-treated soil for quay wall, Ground Improvement  URL/Link

S. Nishimura, K. Takehana, Y. Morikawa, H. Takahashi (2011) Experimental study of stress changes due to compaction grouting, Soils and Foundations  URL/Link

P.H. Dong, K. Hayano, Y. Kikuchi, H. Takahashi, Y. Morikawa (2011) Deformation and crushing of particles of cement treat granulate soil, Soils and Foundations  URL/Link

H. Takahashi, Y. Morikawa, E. Ichikawa (2010) Effects of rigid sidewall of specimen container on seismic behaviour, Physical Modelling in Geotechnics  URL/Link

H. Takahashi, M. Kitazume, S. Ishibashi, S. Yamawaki (2006) Evaluating the saturation of model ground by P-wave velocity and modelling of models for a liquefaction study, International Journal of Physical Modelling in Geotechnics URL/Link

H. Takahashi, M. Kitazume, S. Ishibashi (2006) Effect of deep mixing wall spacing on liquefaction mitigation, Proceedings of the International Conference on Physical Modelling in Geotechnics

I. Vahaaho, H. Kangas, H. Takahashi, M. Kitazume (2005) Effect of permeability and stiffness of treated column on consolidation phenomenon of improved ground, Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering  URL/Link

H. Takahashi, M. Kitazume (2004) Consolidation and permeability characteristics on cement treated clays from laboratory tests, Engineering practice and performance of soft deposits  URL/Link