RYUNOSUKE KIDO

Last Updated :2026/05/08

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Associate Professor
Web Site
https://ryunosuke-kido.hiroshima-u.ac.jp/
E-mail
rkidohiroshima-u.ac.jp
Self-introduction
We investigate the microscopic properties of soil particles, water, and air, and their relationship with the macroscopic response of soil.

Basic Information

Academic Degrees

  • Kyoto University
  • Kyoto University

Research Keywords

  • Unsaturated soils
  • Pile foundations
  • Pavements
  • Soil bags
  • X-ray computed tomography
  • Image analysis
  • Triaxial compression tests
  • Discrete element method
  • Centrifuge model test
  • Surface-wave method

Educational Activity

Course in Charge

  1. 2026, Liberal Arts Education Program1, 1Term, Introductory Seminar for First-Year Students
  2. 2026, Undergraduate Education, 3Term, Lifestyle and the city
  3. 2026, Undergraduate Education, 2Term, Mathematics of Civil Engineering
  4. 2026, Undergraduate Education, 4Term, Soil Mechanics
  5. 2026, Undergraduate Education, 4Term, Exercise of Soil Mechanics
  6. 2026, Undergraduate Education, 4Term, Geotechnical and Architectural Foundation Engineering
  7. 2026, Undergraduate Education, 3Term, Seminar in Civil and Environmental Engineering
  8. 2026, Undergraduate Education, 1Term, Introduction of Civil and Environmental Engineering
  9. 2026, Graduate Education (Master's Program) , 1Term, Special Exercises on Civil and Environmental Engineering A
  10. 2026, Graduate Education (Master's Program) , 2Term, Special Exercises on Civil and Environmental Engineering A
  11. 2026, Graduate Education (Master's Program) , 3Term, Special Exercises on Civil and Environmental Engineering B
  12. 2026, Graduate Education (Master's Program) , 4Term, Special Exercises on Civil and Environmental Engineering B
  13. 2026, Graduate Education (Master's Program) , Year, Special Study on Civil and Environmental Engineering
  14. 2026, Graduate Education (Master's Program) , 3Term, Advanced Soil Mechanics

Research Activities

Academic Papers

  1. Infiltration characteristics of bentonite-based stabilizing fluid into pore spaces of sand investigated by X-ray micro-CT analysis, ACTA GEOTECHNICA, 21(2), 623-642, 202602
    Link to Paper Search Results by DOI
  2. Macroscale and microscale triaxial compressive behaviors of loose saturated sand under excess pore water pressure generation, SOILS AND FOUNDATIONS, 66(2), 202604
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  3. Numerical investigation on effects of particle size distribution on loess mechanics using DEM, ENVIRONMENTAL EARTH SCIENCES, 84(21), 20251023
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  4. Microscopic investigation into density dependence of water retention characteristics of sand during drying-wetting process, SOILS AND FOUNDATIONS, 65(6), 202512
    Link to Paper Search Results by DOI
  5. Sustainable stabilization of sandy soils using steel slag and biopolymer cellulose, CASE STUDIES IN CONSTRUCTION MATERIALS, 22, 202507
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  6. Uplift capacity analysis of inclined strip anchors considering spatial variability of undrained shear strength: RAFELA and ANN, COMPUTERS AND GEOTECHNICS, 177, 202501
    Link to Paper Search Results by DOI
  7. A microscopic interpretation of hysteresis in the water retention curve of sand, Géotechnique, 1-27, 20240110
  8. Effect of fine shredded paper on the hydraulic conductivity of soft clay, 15th JGS Symposium on Environmental Geotechnics, 475-479, 202311
  9. Pore-scale investigation on mud film formation during infiltration of bentonite slurry solution, 33rd ALERT Geomaterials Workshop, 48-49, 202309
  10. Progressive formation of concentrated seepage path in gap-graded sand due to suffusion and its influence on permeability change, Smart Geotechnics for Smart Societies, 348-351, 20230807
  11. Construction and field observation of chain reinforced soil walls in wind power generation projects, 17(4), 573-586, 20221201
  12. Characterization of water retention states in partially saturated sand based on morphology of pore water and pore air using X-ray micro computed tomography, Proc. of 20th International Conference on Soil Mechanics and Geotechnical Engineering (ICSMGE 2021), 202205
  13. Centrifuge model;tests on;the;effects of the supporting dense sand;layer thickness on;a;pile under;static loading, 10th International Conference on Physical Modelling in Geotechnics, 2022
  14. Experimental data of 3D printed granular material for verification of discrete element modeling simulation, Soils and Foundations, 62(4-101178), 1-21, 2022
  15. Experimental investigation of bearing mechanism of closed- and open-ended piles supported by thin bearing layer using X-ray micro CT, Soils and Foundations, 62(4-101179), 1-16, 2022
  16. Investigation of soil deformation characteristics during pullout of a ribbed reinforcement using X-ray micro CT, Soils and Foundations, 61(3), 642-657, 202106
  17. Short- and Long-Term Observations of Fracture Permeability in Granite by Flow-Through Tests and Comparative Observation by X-Ray CT, International Journal of Geomechanics, 21(9), 04021151-04021151, 2021
  18. Influence of bearing layer thickness on vertical bearing capacity of pile and soil deformation behavior, Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering), 76(4), 429-440, 202012
  19. Microscopic characteristics of partially saturated dense sand and their link to macroscopic responses under triaxial compression conditions, Acta Geotechnica, 15(11), 3055-3073, 20200804
  20. Morphological transitions for pore water and pore air during drying and wetting processes in partially saturated sand, Acta Geotechnica, 15(7), 1745-1761, 202007
  21. Quantification of pore volume and degree of saturation in partially saturated sands with different bulk density, Japanese Geotechnical Society Special Publication, 8(6), 216-220, 20200314
  22. Microscopic observation of variation in pore volume and local degree of saturation in partially saturated sand under triaxial compression using voronoi tessellation, Proc. of the 9th Asian Young Geotechnical Engineers Conference (9AYGEC), Lahore, Pakistan, 142-147, 201912
  23. Investigation of volume distribution for pore water and pore air in partially saturated sand subjected to drying and wetting through morphological image processing, Proc. of the 16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, 201910
  24. Distribution changes of grain contacts and menisci in shear band during triaxial compression test for unsaturated sand, Japanese Geotechnical Society Special Publication, 7(2), 627-635, 20190430
  25. Relationship Between Density Changes in Pile Tip Ground and Bearing Layer Thicknesses Under Loading: Applications of an X-ray Micro Tomography and a Porosity Mapping Analysis, 62B, 254-263, 2019
  26. Pore-scale investigations of partially water-saturated granular soil, Mechanics Research Communications, 94, 1-7, 201812
  27. Three-dimensional measurement of displacement field in sand specimens under triaxial compression, Proc. of the 7th China-Japan Geotechnical Symposium, 122-127, 201803
  28. Microscopic investigation of progressive changes of pore water distribution in shear band of unsaturated sand under triaxial compression, Proc. of the 19th International Conference on Soil Mechanics and Geotechnical Engineering, 1171-1174, 201709
  29. Evaluation of distribution of void ratio and degree of saturation in partially saturated triaxial sand specimen using micro x-ray tomography, Japanese Geotechnical Society Special Publication, 5(2), 22-27, 2017
  30. MICROSCOPIC CHARACTERISTICS OF PORE WATER DURING PROGRESSIVE DEVELOPMENT OF SHEAR BANDS OF PARTIALLY SATURATED SAND UNDER TRIAXIAL COMPRESSION, Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering), 73(2), 233-247, 2017
  31. Local water-retention behaviour of sand during drying and wetting process observed by micro x-ray tomography with trinarisation, Japanese Geotechnical Society Special Publication, 2(16), 635-638, 2016

Awards

  1. 2023/04, 国際会議若手優秀論文賞（第20回国際地盤工学会議）, 公益社団法人地盤工学会
  2. 2022/03, 令和3年度地盤工学会賞 研究奨励賞, 公益社団法人地盤工学会

External Funds

Acceptance Results of Competitive Funds

  1. 2024/04, 2026/03
  2. 2023/04/01, 2025/03/31
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  3. 2024/04, 2025/03
  4. Grants-in-Aid for Scientific Research Fund for the Promotion of Joint International Research (Fostering Joint International Research (B)), International collaboration to establish new framework of soil mechanics enhanced by granular mechanics, 2021/10, 2025/03
  5. 2023/04, 2024/03
  6. 2020/04/01, 2023/03/31
  7. 2020/04/01, 2023/03/31
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  8. 2022/04, 2023/03
  9. 2022/04, 2023/03
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  10. 2022/04, 2023/03
  11. 2021, 2022
  12. 2019/08/30, 2021/03/31
  13. 2017/04/26, 2019/03/31