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Home > Tenured Faculties > Horikawa Yoshiki

Tenured Faculties

Horikawa Yoshiki

Affiliation Institute of Agriculture
Division Division of Natural Resources and Eco-materials
Research field Natural Resources and Eco-materials
Keyword(S) Cellulose, Biomass, Cell wall, Spectroscopy, Electron microscope
Research experience

・Apr. 2008 - Aug. 2008: Researcher in Research Institute for Sustainable Humanosphere, Kyoto University.
・Sep. 2008 - Mar. 2013: Program-Specific Researcher in Research Institute for Sustainable Humanosphere, Kyoto University.
・Apr. 2013 - Mar. 2014: Researcher in Research Institute for Sustainable Humanosphere, Kyoto University.
・Apr. 2014 - Sep. 2015: Program-Specific Researcher in Research Institute for Sustainable Humanosphere, Kyoto University.
・Oct. 2015 - Sep.2020: Associate Professor, Tokyo University of Agriculture and Technology
・Oct. 2020 - Present: Associate Professor(Tenured), Tokyo University of Agriculture and Technology

Educational background

・Mar. 2002: Bachelor of faculty of applied biological sciences, agricultural department, Nagoya university.
・Mar. 2004: Master of division of forest and biomaterials science, graduate school of sgriculture, Kyoto university.
・Mar. 2008: Ph.D. in division of forest and biomaterials science, graduate school of sgriculture, Kyoto university.


* The latest information is shown at the member's website.
(At Oct. 2020)
・Poster award at the 57th Japan wood research society conference(2007)
・Poster award at the 24th Cellulase society of Japan(2010)
・The Cellulose Society of Japan Encouragement Prize in 2012
・Poster award at the 68th Japan wood research society conference (2018)
・Poster award at the 26th Cellulose society of Japan (2019)

Selected papers and publications

* The latest information is shown at the member's website.
(At Oct. 2020)
・Horikawa, Y., Itoh, T., Sugiyama, J., Preferential uniplanar orientation of cellulose microfibrils reinvestigated by the FTIR technique., Cellulose 13(3): 309-316(2006).
・Horikawa, Y., Sugiyama, J., Localization of crystalline allomorphs in cellulose microfibril., Biomacromolecules 10(8): 2235-2239(2009) .
・Horikawa, Y., Imai, M., Kanai, K., Imai, T., Watanabe, T., Takabe, K., Kobayashi, Y., Sugiyama, J., Line monitoring by near-infrared chemometric technique for potential ethanol production from hydrothermally treated Eucalyptus globulus., Biochemical Engineering Journal 97: 65-72(2015).
・Horikawa, Y., Mizuno-Tazuru, S., Sugiyama, J., Near-infrared spectroscopy as a potential method for identification of anatomically similar Japanese diploxylons., Journal of Wood Science 61 (3): 251-261(2015).
・Horikawa, Y., Imai, T., Abe, K., Sakakibara, K., Tsujii, Y., Mihashi, A., Kobayashi, Y., Sugiyama, J. Assessment of endoglucanase activity by analyzing the degree of cellulose polymerization and high-throughput analysis by near-infrared spectroscopy. Cellulose, 23(3), 1565-1572 (2016).
・Horikawa, Y., Imai, T., Sugiyama, J. Visualization of cellulase interactions with cellulose microfibril by transmission electron microscopy. Cellulose, 24(1), 1-9 (2017).
・Horikawa, Y. Assessment of cellulose structural variety from different origins using near infrared spectroscopy. Cellulose, 24(12), 5313-5325 (2017).
・Horikawa, Y., Shimizu, M., Saito, T., Isogai, A., Imai, T., Sugiyama, J. Influence of drying of Chara cellulose on length/length distribution of microfibrils after acid hydrolysis. International Journal of Biological Macromolecules, 109, 569-575 (2018).
・Horikawa, Y., Hirano, S., Mihashi, A., Kobayashi, Y., Zhai, S., Sugiyama, J. Prediction of lignin contents from infrared spectroscopy: chemical digestion and lignin/biomass ratios of Cryptomeria japonica. Applied Biochemistry and Biotechnology, 188(4), 1066-1076 (2019).
・Horikawa, Y., Tsushima, R., Noguchi, K., Nakaba, S., Funada, R. Development of colorless wood via two-step delignification involving alcoholysis and bleaching with maintaining natural hierarchical structure. Journal of Wood Science, 66, (2020) on line.

Research Description

Large consumption of fossil fuel resulted in depletion of resources and globally changed the environmental condition; in addition, Japan had big damage by radioactive contamination, which makes us reflect on the reliability of science and technology, and requires renewable as well as safety sources. Wooden biomass, satisfying the abovementioned requirements, has an advantage in that carbon resources are accumulated as trees in forest and we can use them anytime we need. Usage of wooden biomass for material and energy decreases the consumption of fossil fuel and may contribute the construction of recyclable society by using its economic benefit for planting and caring forests.
It is, however, essential to understand this high biostructure for developing functional material or better energy conversion. We have to precisely study various functions of wooden molecules depositing in cell wall by macro- to nano-structural analysis. I am going to investigate the suprastructure of cellulose microfibril, its interaction with matrix components, and relationships with cell and anatomical features as well as diversity of wood species for more effective utilization of wooden biomass.

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About TUAT's tenure-track program

An independent research is to determine the target “for what, what, how, and how far I do” and promote it by myself. Tenure-track is an attractive program because it supports sufficient budget and gives time by decreasing the duties except for research. The employment period of 5 years also provides good opportunity for training to consider the limit and departure to other research field, which would be valuable after getting a position. In addition, this program includes the student advising, therefore I would work as a staff belonging to university as a researcher and at the same time as an educator.

Future aspirations

An advantage in university research is to concentrate on fundamental study, which differs from institutional research. But we have to promote our investigation with keeping better cyclic usage of plant biomass as a goal for the future. By collaborative interaction with researchers who study in other fields, fresh idea and angles are to be introduced for developing my research and pioneering a new field in the future.