OWARI Toshiaki

J-GLOBAL         Last updated: Jul 22, 2019 at 13:23
OWARI Toshiaki
The University of Tokyo
The University of Tokyo Forests, Graduate School of Agricultural and Life Sciences
Job title
Associate Professor
Ph. D. in Agriculture(The University of Tokyo), MSc in Agriculture and Forestry(University of Helsinki)


Dr. Toshiaki Owari earned his PhD in forest science at the University of Tokyo in 2000. He was Instructor of forest management and engineering at Hokkaido University between 1997-2006. During 2003-2005, he was at the University of Helsinki, Finland, to study forest products marketing and forest certification. He was Lecturer between 2006-2012 and has been Associate Professor since 2012 at the University of Tokyo. In 2018, he was Visiting Associate Professor at Asian Institute of Technology, Thailand. He is currently Director of the University of Tokyo Chiba Forest, and Deputy Coordinator of IUFRO Research Group 5.10.00 (Forest products marketing and business management) and Working Party 1.01.09 (Ecology and silviculture of fir).

Research Areas


Academic & Professional Experience

Sep 2012
Associate Professor, Graduate School of Agricultural and Life Sciences, The University of Tokyo
Sep 2018
Oct 2018
Visiting Associate Professor, Department of Development and Sustainability, School of Environment, Resources & Development, Asian Institute of Technology
Apr 2012
Mar 2013
Visiting Associate Professor, Risk Analysis Research Center, The Institute of Statistical Mathematics
Jun 2006
Aug 2012
Lecturer, The University of Tokyo, Graduate School of Agricultural and Life Sciences
Apr 2006
May 2006
Instructor, Research Faculty of Agriculture, Hokkaido University
Apr 1999
Mar 2006
Instructor, Graduate School of Agriculture, Hokkaido University
Jan 1997
Mar 1999
Instructor, Faculty of Agriculture, Hokkaido University


Apr 1989
Mar 1993
Department of Forestry, Bachelor, Faculty of Agriculture, Hokkaido University
Apr 1993
Mar 1995
Division of Forestry, Master course, Graduate School of Agriculture, Hokkaido University
Apr 1995
Dec 1996
Division of Forest Science, Doctor course, Graduate School of Agricultural and Life Sciences, The University of Tokyo
Sep 2000
PhD. in Agriculture, The University of Tokyo
Jan 2003
Dec 2007
Forest Products Marketing, MSc., Faculty of Agriculture and Forestry, University of Helsinki

Committee Memberships

Apr 2017
Japan Society of Forest Planning  Planning Committee
Oct 2014
International Union of Forest Research Organizations (IUFRO)  Deputy Coordinator (Working Party 1.01.09: Ecology and silviculture of fir)
Oct 2013
Open Journal of Ecology  Editorial Board
Aug 2012
Journal of Tropical Forestry and Environment  Editorial Board
Sep 2005
Sep 2019
International Union of Forest Research Organizations  Deputy Coordinator (Unit 5.10.00)

Published Papers

Morimoto, J., Umebayashi, T., Suzuki, S.N., Owari, T., Nishimura, N., Ishibashi, S., Shibuya, M., Hara, T.
Landscape and Ecological Engineering   15(2) 133-141   Apr 2019   [Refereed]
Many reports on the effects of conventional salvage logging—the removal of fallen and damaged trees after a catastrophic windthrow—on subsequent forest restoration have focused on short-term results occurring over less than 20 years; however, this...
Jayathunga, S., Owari, T., Tsuyuki, S.
Remote Sensing   11(3) 338   Feb 2019   [Refereed]
Scientifically robust yet economical and efficient methods are required to gather information about larger areas of uneven-aged forest resources, particularly at the landscape level, to reduce deforestation and forest degradation and to support th...
Minowa, Y., Owari, T., Nakajima, T., Inukai, H.
Journal of the Japanese Forest Society   100(6) 208-217   Dec 2018   [Refereed]
This study aims at achieving the automatic extraction of attributes for influencing tree-marking decisions and decision rules, and constructing classification models for marked trees by employing machine-learning algorithms. A tree-marking exercis...
Jayathunga, S., Owari, T., Tsuyuki, S.
International Journal of Applied Earth Observations and Geoinformation   73 767-777   Dec 2018   [Refereed]
Remote sensing (RS) data are often used as a complementary data source to acquire accurate quantitative estimations of merchantable volume (V) and carbon stock in living biomass (CST), which are critical for the sustainable use of forest resources...
Minowa, Y., Owari, T., Nakajima, T., Inukai, H.
Journal of the Japanese Forest Society   100(2) 37-46   Jun 2018   [Refereed]
Tree marking for harvesting is one of the crucial techniques for natural forest management under the selection system. In this study, we examined the visual stem indicators that affect tree-marking decisions, and the effects of tree markersʼ exper...

Books etc

Kamata, N., Kuraji, K., Owari, T., Guan, B.T. (eds.) (Part:Joint Editor, Chapter 1 and 16)
The University of Tokyo Forests Press   Mar 2019   ISBN:9784903321288
Tachibana, S., Kuboyama, H., Inoue, M., Higashihara, T. (eds.) (Part:Contributor)
Kaiseisha Press   Oct 2014   ISBN:9784860993023
Kraxner, F., Fernholz, K., Owari, T. (Part:Contributor, Certified forest products markets, 2010-2011)
United Nations   Dec 2011   ISBN:9211170508
Toshiaki Owari
LAP LAMBERT Academic Publishing   Oct 2011   ISBN:3846525731
Kraxner, F., Mater, C., Owari, T. (Part:Contributor, Green building drives construction market and forest certification: Certified forest products markets, 2007-2008)
United Nations   Nov 2008   ISBN:9211169909


"Retention Forestry: Harvesting Trees while Conserving Biodiversity" edited by KAKIZAWA Hiroaki, YAMAURA Yuichi, and KURIYAMA Koichi
Owari, T.
Forest Economy   72(3) 23-27   Jun 2019   [Invited]
Owari, T., Yasumura, N., Ishibashi, S., Kamoda, S., Saito, H.
Proceedings of the SILVA Network Conference 2017   SILVA Network Publication(15) 38-50   Dec 2018   [Refereed]
In-forest teaching is a vital element of forest science education at university level, and university forests play a critical role in this. In Japan, the University of Tokyo (UTokyo) owns the oldest university forest, which was established in 1894...
Tree marking techniques in the stand-based forest management system: Work behavior of tree markers under selection system
Owari, T., Matsui, M., Eguchi, Y., Nobu, E., Kobayashi, T., Minowa, Y.
Boreal Forest Research   66 79-82   Feb 2018
A trial of forest stand assessment using low-cost fixed-wing unmanned aerial vehicle (UAV)
Inukai, H., Tokuni, M., Nakagawa, Y., Furuya, N., Jayathunga, S., Owari, T.
Boreal Forest Research   66 93-96   Feb 2018
Owari, T.
IUFRO News   45(12) 3   Dec 2016   [Invited]

Conference Activities & Talks

Hirata, Y., Furuya, N., Owari, T., Sakaue, D.
XXV IUFRO World Congress   4 Oct 2019   International Union of Forest Research Organizations (IUFRO)
Natural forests are expected to demonstrate multifaceted functions such as biodiversity preservation function and environment conservation function. On the other hand, accurate information on natural forest resources necessary for sustainable mana...
Kamata, N., Owari, T., Kuraji, K.
XXV IUFRO World Congress   1 Oct 2019   International Union of Forest Research Organizations (IUFRO)
Under changing environments, long-term monitoring and inventory data are important to detect temporal changes in environments and ecosystems. There have been so many attempts that aimed long-term research or monitoring. However, many of them have ...
Owari, T., Toyama, K., Suzuki, S.N., Hiroshima, T., Ishibashi, S.
XXV IUFRO World Congress   1 Oct 2019   International Union of Forest Research Organizations (IUFRO)
Long-term experimental plots can provide reliable and consistent tree growth data as a quantitative basis for sustainable forest management. The Europe-wide network of long-term experimental plots is currently used for quantifying and characterizi...
Owari, T., Park, P.S.
XXV IUFRO World Congress 2019   30 Sep 2019   International Union of Forest Research Organizations (IUFRO)
Close-to-nature silviculture is a type of silvicultural approach, in which the intrinsic processes of forest ecosystems are regarded as highly important. Partial cutting with natural regeneration is typically used, so that the stability and divers...
Pinpoint planting in logging gaps with Abies sachalinensis seedlings after single-tree selection harvest in northern Japan
Owari, T., Okamura, K., Takuma, R., Kimura, N., Fukuoka, S.
IUFRO 1.01.09 Ecology and Silviculture of Fir Conference (Abies 2019)   28 May 2019   IUFRO WP 1.01.09, Agricultural University in Cracow, Forest Research Institute
Selection system that maintains an uneven-aged stand structure by periodically removing individual trees has been employed since the early 20th century to manage mixed conifer-broadleaf forests in Hokkaido, northern Japan. The system requires logg...

Teaching Experience


Research Grants & Projects

The Japan Society for the Promotion of Science: Core-to-Core Program (B. Asia-Africa Science Platforms)
Project Year: Apr 2019 - Mar 2022    Investigator(s): Kamata, N.
The Japan Society for the Promotion of Scinence: Grants-in-Aid for Scientific Research (C)
Project Year: Apr 2018 - Mar 2021    Investigator(s): Owari, T.
The Japan Society for the Promotion of Science: Grants-in-Aid for Scientific Research (A)
Project Year: Apr 2017 - Mar 2021    Investigator(s): Morimoto, J.
The Japan Society for the Promotion of Science: Core-to-Core Program (B. Asia-Africa Science Platforms)
Project Year: Apr 2016 - Mar 2019    Investigator(s): Kamata, N.
The Japan Society for the Promotion of Science: Grant-in-Aid for Scientific Research (B)
Project Year: Apr 2016 - Mar 2019    Investigator(s): Hirata, Y.