Engineering educational research section Department of Civil and Environmental Engineerring Program


Associate Professor

Contact information

Contact information


Dr. Fukubayashi is conducting the research on development of the method to utilize local soil material for geotechnical engineering purposes applying soil improvement and geotextile techniques. He has the experience working as project engineer/manager at a construction company and NGO in both Japan and developing countries.

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Degree 【 display / non-display

  • Doctor of Engineering ( 2017.11   Kyoto University )

Research Interests 【 display / non-display

  • Rural infrastructure development

  • Base course

  • Subgrade

  • Slope stability

  • earth retaining

  • Geotextile

Research Areas 【 display / non-display

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Geotechnical engineering

Professional Memberships 【 display / non-display

  • 森林利用学会


  • Journal of International Development Studies


  • Japan Society of Civil Engineering


  • The Japanese Geotechnical Society



Papers 【 display / non-display

  • 粘性土中に打設される木杭の鉛直支持力に及ぼす杭形状の影響 Reviewed


    土木学会論文集E2   77 ( 5 )   77 - 83   2022.3

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    Authorship:Last author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.2208/jscejmcs.77.5_I_77

  • Performance of labor-intensive base course for gravel roads with application of Do-nou Reviewed

    Fukubayashi Y., Koyama A., Suetsugu D.

    Transportation Engineering   7   2022.3

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Transportation Engineering  

    Community participation in road construction and repair is necessary in improving rural roads in developing countries, more than 50% of which are in poor condition caused by less involvement by the government due to budget constraints. To promote community participation, constructing base course with do-nou, the Japanese term for soil bag, which does not require the use of compaction equipment, has been proposed as a practical method. To extend the application of this method, the method must be adopted by stakeholders and its performance must be clearly understood. In this study, to compare the performance of the base course constructed with do-nou with that of the conventional structures constructed with equipment based on the existing manual for low-volume roads, a series of full-size model driving tests were conducted. Silty sand with gravel was selected as the base course material that is locally available and can be practically used in rural areas of developing countries. The deformation of the base course reinforced with do-nou under traffic loading was 14.0%. By contrast, the deformation for the base course compacted with equipment was 4.9% and that for the base course compacted manually without reinforcement with do-nou was 20.9%. The results of a dynamic cone penetration survey revealed that encapsulating the base course material in do-nou bags efficiently converted the traffic load into compaction energy and thus developed a balanced strength profile. Base course reinforced with do-nou behaved as an aggregate of distinct elements of do-nou and transferred a smaller load to the subgrade when subjected to traffic loading compared with nonreinforced base courses compacted manually and with equipment. The base course with do-nou and manual compaction did not perform as well as the base course compacted with equipment; however, it demonstrated intermediate performance with surface settlement of less than the maximum allowable level of 50.8 mm. The thickness of the base course reinforced with do-nou can be determined according to the existing design manual. The degree of compaction of base course constructed labor-intensively is initially insufficient. Therefore, once the road is opened to traffic, traffic should pass over the entire width of the road in dry conditions to accelerate compaction and improve road performance.

    DOI: 10.1016/j.treng.2021.100100


  • Experimental study on the dynamic properties of rigid polyurethane foam in stress-controlled cyclic uniaxial tests Reviewed

    Koyama A., Suetsugu D., Fukubayashi Y., Mitabe H.

    Construction and Building Materials   321   2022.2

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Construction and Building Materials  

    Frequent major earthquakes in Japan necessitate earthquake-resistant infrastructure. The dynamic deformation characteristics of rigid polyurethane foam, used as a lightweight embankment material, is examined in this study. The effect of the initial static stress on the shear modulus of single-layer samples was small, while the shear modulus of two-layer samples increased with increasing initial static stress. The damping ratio of single-layer samples converged to 4–5%, but decreased with increasing initial static stress up to 30 kPa in two-layer samples before increasing above 40 kPa. Results from cyclic uniaxial and triaxial tests were compared. The dynamic properties depended on restriction conditions and the deformation direction.

    DOI: 10.1016/j.conbuildmat.2022.126377


  • Deformation Resistance of the Gabion Retaining Wall Under Horizontal Loading Reviewed

    Suetsugu D., Nakazawa H., Hara T., Fukubayashi Y., Koyama A.

    Lecture Notes in Civil Engineering   209 LNCE   999 - 1007   2022

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Lecture Notes in Civil Engineering  

    This research investigated the effects of the connecting gabions, the packing density and the particle shape of the filling gravel, and the vertical pressure on the horizontal deformation resistance of the gabion retaining wall. The dimensions of the model gabion used in this experiment were 20 cm × 20 cm × 20 cm. The model gabion retaining wall was prepared by stacking three of them vertically. The horizontal loading tests were performed with a plane strain, in which a gabion in the middle of the retaining wall was pushed horizontally while applying constant vertical load. The obtained main findings are as follows. 1) The connecting gabions have the effect of increasing the deformation resistance due to the generation of tension in the gabion net due to the deformation of itself. 2) The particle shape of the filling gravel affects the deformation resistance of the gabion retaining wall. That is, the rigidity of the gabion retaining wall using the round gravel at a small deformation level was stiffer than in the case using the angular gravel. 3) The vertical stress acting on the gabion retaining wall has little influence on its deformation resistance.

    DOI: 10.1007/978-3-030-90788-4_77



    FUKUBAYASHI Yoshinori, KIMURA Makoto

    Journal of Japan Society of Civil Engineers, Ser. F5 (Professional Practices in Civil Engineering)   78 ( 1 )   1 - 15   2022

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japan Society of Civil Engineers  

    <p> In rural area of developing countries, river crossing with no bridges hamper people access to social services, especially in rainy seasons. In this paper, an international technical cooperation approach is presented for enhancing community initiatives for building and maintaining small road bridges by themselves through designing bridges and providing material and technical transfer to the communities for constructions. Under the circumstances where the hydrological data and geoengineering information at the sites were limited and mechanical properties of available construction material were not statistically standardized, with reasonable assumptions, the bridges were designed and constructed. Quality control of the construction done through community initiatives were not equivalent to the cases where contractors were engaged. It was difficult to quantify performance of the constructed bridges through community initiatives. It was also necessary to build consensus on the proposal of feasible and economical design of the bridges considering socioeconomic impact among the local communities who normally expected internationally high standard services to the NGOs. Several bridges were constructed by the communities with support from the NGOs that the authors were established. After four to seven years have passed, they have been serving reasonable access to local communities without causing any human casualties, while some damages were found. It was important that communities were well organized and motivated to inspect and maintain the bridges from time to time and equipped with necessary skills for repairing the small scale damages. In collaborations with the NGOs that have conducted community participatory projects in any fields, the NGO with the expertise of civil engineering could support efficiently and effectively the community taking charge of constructing bridges and ownership on the constructed bridge sustainably. The lessons learned are summarized to enable to construct the bridges through community initiatives for providing access over river crossing to rural communities.</p>

    DOI: 10.2208/jscejppce.78.1_1

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Books 【 display / non-display

  • これからのインフラ開発

    福林 良典( Role: Contributor)

    弘文堂  2021.8 

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    Total pages:209   Responsible for pages:30   Language:Japanese Book type:General book, introductory book for general audience

  • International development

    Y. Fukubayashi and M. Kimura( Role: Contributor)

    Intech  2017.4 

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    Total pages:89   Responsible for pages:117   Language:English Book type:Scholarly book

  • パプアニューギニアー日本人が見た南太平洋の宝島

    田中辰夫編著、熊谷圭知、鈴木紀久代、荏原美知勝、福林良典 他9名( Role: Contributor)

    花伝社  2010.3 

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    Total pages:197   Responsible for pages:202   Language:Japanese Book type:General book, introductory book for general audience

MISC 【 display / non-display

  • 国際開発学2.0-新型コロナとニューノーマル

    山田肖子、大塲麻代、汪 牧耘、曾田剛史、福林良典、佐藤 仁、高田潤一、島田 剛

    国際開発学研究   30 ( 1 )   75 - 89   2021

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

    DOI: https://doi.org/10.32204/jids.30.1_75

  • Project overview: Improving year-round accessibility by localizing technology

    Shunsuke Matsukuma, Yoshinori Fukubayashi, Yasuo Sawamura

    Zairaichi   2   7 - 11   2020.3

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    Language:English   Publishing type:Article, review, commentary, editorial, etc. (bulletin of university, research institution)   Publisher:The center for African Area Studies, Kyoto University  

  • 道普請は世界へ続く


    外交   2019.7

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)  

  • アフリカの若者が主体になるSDGsに向けた取り組み Invited


    大原社会問題研究所雑誌 No.726   729   37 - 44   2019.4

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (bulletin of university, research institution)   Publisher:法政大学大原社会問題研究所  

  • Development of training program for bridge check engineers in Miyazaki


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    Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)  

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Presentations 【 display / non-display

  • 宮崎層群泥岩の加熱によるスレーキング特性変化の把握とメカニズムの検討

    藤井啓太、福林良典、澤山 重樹、神山 惇、末次大輔


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    Event date: 2021.7.12 - 2021.7.15

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 海水に接触するセメント処理土のカルシウム溶出予測の検討

    皿良和樹、末次大輔、神山 惇、福林良典


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    Event date: 2021.7.12 - 2021.7.15

    Presentation type:Oral presentation (general)  

  • 粘土地盤に打設された丸太杭の鉛直支持力に及ぼす杭形状の影響

    末次大輔、那須龍斗、神山 惇、福林良典


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    Event date: 2021.7.12 - 2021.7.15

    Presentation type:Oral presentation (general)  

  • 実物大走行実験による細粒分まじり礫質砂を中詰材とする土のう路盤の性能評価

    佐藤聡平、福林良典、神山 惇、末次大輔


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    Event date: 2021.7.12 - 2021.7.15

    Presentation type:Oral presentation (general)  

  • 令和元年8月豪雨によるため池堤体のすべり破壊発生メカニズムの検討

    神山 惇、藤本哲生、末次 大輔、福林良典


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    Event date: 2021.7.12 - 2021.7.15

    Presentation type:Oral presentation (general)  

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Awards 【 display / non-display

  • 平成27年度土木学会論文賞

    2016.6   土木学会   土のう工法の普及活動を通した未舗装道路のBOPビジネス化

    福林良典、本庄由紀、木村 亮

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

  • 平成19年度地盤工学会関西支部 社会貢献賞

    2008.4   地盤工学会関西支部   「土のう」による住民参加型未舗装道路整備手法の開発と貧困削減へのアプローチ手法の確立

    木村 亮、福林良典

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  • 平成18年度地盤工学会 国際会議若手優秀論文賞

    2007.12   地盤工学会   Maintenance Method of the Rural Access Roads for Poverty Alleviation

    Y. Fukubayashi, M. Kimura

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    Award type:Award from international society, conference, symposium, etc.  Country:Japan

Grant-in-Aid for Scientific Research 【 display / non-display

  • Establishment of prediction method of ground deformation when pulling out earth retaining piles

    Grant number:20K04685  2020.04 - 2023.03

    Grant-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research(C)

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    Authorship:Principal investigator 

  • 地方創生に向けた住民参加型によるインフラ整備の有効性に関する検証

    2017.04 - 2020.03

    科学研究費補助金  基盤研究(C)

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