Contact us

Research Support Office Research Advancement Division. Tokyo University of Agriculture and Technology

TEL +81-42-367-5944
FAX +81-42-367-5946

This program is supported by MEXT’s scientific technology human resource development fee grant, "Program to Disseminate Tenure Tracking System".

Contact us via E-mail

Home > Introduction of our tenure-track faculties > Kose Ryota

Introduction of our tenure-track faculties

Kose Ryota

Affiliation Institute of Agriculture
Division Division of Natural Resources and Eco-materials
Research field Natural Resources and Eco-materials
Keyword(S) Recycle, Cellulose, Paper, Nanofiber
Research experience

・2011. Apr-2011. Oct: Post-doc Researcher, Kyushu University
・2011. Nov-2013. Aug: Post-doc Researcher, Hokkaido University
・2013. Sep-Present: Assistant Professor, Tokyo University of Agriculutre and Technology

Educational background

・2005 Graduated Faculty of Education, Shizuoka University
・2007 Completed Master course, Kyushu University
・2011 Completed Doctor course, Kyushu Univesity


・2011. Aug 13th Predawn Researcher Prize award by Kyushu affiliate of The Japan Wood Research Society

Selected papers and publications

・Ryota Kose, Ikue Mitani, Wakako Kasai and Tetsuo Kondo, "“Nanocellulose” as a single nanofiber prepared from pellicle secreted by Gluconacetobacter xylinus using aqueous counter collision.", Biomacromolecules, 12(3): 716-720, 2011
・Ryota Kose, Tetsuo Kondo, "Favorable 3D-network formation of chitin nanofibers dispersed in water prepared using aqueous counter collision.", Sen’i Gakkaishi, 67(4): 91-95, 2011
・Ryota Kose, Wakako Kasai, Tetsuo Kondo,"Switching surface properties of substrates by coating with a cellulose nanofiber having a high adsorbability.", Sen’i Gakkaishi, 67(7): 163-168, 2011
・Naoki Sunagawa, Kenji Tajima, Mariko Hosoda, Shin Kawano, Ryota Kose, Yasuharu Satoh, Min Yao, Tohru Dairi, "Cellulose production by Enterobacter sp CJF-002 and identification of genes for cellulose biosynthesis.", Cellulose, 19(6): 1989-2001, 2012
・Ryota Kose, Tetsuo Kondo, "Size effects of cellulose nanofibers for enhancing the crystallization of poly(lactic acid).", J Appl Polym Sci, 128(2): 1200-1205, 2013
・Ryota Kose, Sunagawa Naoki, Yoshida Makoto, Tajima Kenji, "One-step production of nanofibrillated bacterial cellulose from waste glycerol using Gluconacetobacter intermedius NEDO-01.", Cellulose, 20(6): 2971-2979, 2013

Research Description

In order for the human race continues to survive longer in a finite global ecosystem, it is important that we promote the recycling of renewable resources. "Paper" is one of the materials with high recyclability. The raw of the paper is a tree and a domestic waste paper utilization ratio reached 63% in 2011(※1). Furthermore, the waste paper which can't recycle due to high damage has been used as solid fuel. The carbon dioxide caused by burning the waste paper is absorbed into the ecosystem of the earth. In addition, 400 million tons of the paper and paperboard is produced per year in a global scale(※2).
In my laboratory, I would like to try to develop new recycling system for waste paper. A key of this system is a nanofiber. The strength of the waste paper decreases with increasing of recycling times, because the fiber in the waste paper becomes shorter and hardened after recycling. Therefore, I produce nanofibers from the waste paper and then use the nanofiber to strength paper and produce new material with water resistance and high strength. It is expected that the new recycling system contributes to a recycling-oriented society, a paper and wood industry.
※1 Paper Recycling Promotion Center HP
※2 "paper and paperboard Statistics Annual Report " Japan Paper Association (2012)

The PDF file can be downloaded from URL

About TUAT's tenure-track program

Tenure track system offers enough time and money to young researchers. In addition, it is possible to receive advice from the mentor teacher and this advice is very beneficial for young researchers. The most attractive point is that young researcher can concentrate their research without paying the attention relating with tuition and university management. In addition, it is very attractive that they get the next post if they achieve the examination standards.

Future aspirations

Now human race has faced the global environmental problems such as global warming and the depletion of natural resources. If these problems become more acute, we can't live on the earth. However, it is seemed that we have used a lot of energy and resource in the scale destructing the earth's ecosystem in spite of feeling the sense of crisis like this.
I recognize that the college is the place where we can research about this problem comprehensively and objectively. Under this awareness, I would like to continue to research appropriate material and the production process for sustainable society through "Paper" in conjunction with students.