Toshiaki Owari

Toshiaki Owari, Associate Professor

Associate Professor, The University of Tokyo Forests, Graduate School of Agricultural and Life Sciences, The University of Tokyo

Professional Experience & Education

2012: Visiting Associate Professor, Risk Analysis Research Center, The Institute of Statistical Mathematics, Research Organization of Information and Systems, Japan; Present
2007: M.S., Department of Forest Economics, Faculty of Agriculture and Forestry, University of Helsinki, Finland
2006: Instructor, Division of Environmental Resources, Research Faculty of Agriculture, Hokkaido University, Japan; Lecturer, University Forests, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan
2000: Ph.D., Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan
1999: Instructor, Division of Environmental Resources, Graduate School of Agriculture, Hokkaido University, Japan
1997: Instructor, Department of Forest Science, Faculty of Agriculture, Hokkaido University, Japan
1995: M.S., Department of Forestry, Graduate School of Agriculture, Hokkaido University, Japan
1993: B.S., Department of Forestry, Faculty of Agriculture, Hokkaido University, Japan

Phone +81 167 42 2111

Email owari@uf.a.u-tokyo.ac.jp

Research interests

  1. Natural forest management and planning
  2. Precision management of forest ecosystems using geospatial information technologies
  3. Sustainable forest management and forest certification
  4. International forest products business and marketing

Study example

  1. As an essential practice to sustain provisioning forest ecosystem services, intensive forest inventory has been conducted and analyzed at the University of Tokyo (UT) Hokkaido Forest, northern Japan. More than 13 thousand inventory plots have been established and measured within the UT Hokkaido Forest since the 1960s. By analyzing the inventory data, we characterized the stand structure of selection forests, assessed the long-term effects of selection system applications on stand structure, and examined how site conditions in selection forests relate to the regeneration abundance of Abies sachalinensis.
  2. Precision forest management with global positioning system (GPS) and laser-based survey system have been successfully introduced at the UT Hokkaido Forest. In-depth ground surveys with high accuracy and labor economy are essential for the stand-based forest management. A laser rangefinder with the electronic compass module and a handy GPS receiver are useful tools for forest traverse surveys. Tree marking is also important in single-tree selection system. High-sensitivity GPS receiver is utilized to pinpoint the geographic location of marked trees.
  3. We examined the benefits of chain of custody certification in the forest products market in Japan. A nationwide survey was conducted to closely investigate prevailing experiences and perceptions among Japanese certificate holders. Results indicated that it was not possible for most Japanese companies to receive premium prices for certified forest products. Factor analysis determined three benefit dimensions: (1) business performance, (2) customer relations, and (3) environmental communication. The mean benefit rating of environmental communication was the highest, followed by customer relations. Business performance was rated significantly lower than the other two dimensions. Paper products companies, as well as large companies (≥ 300 employees), received relatively high benefits from certification.

Primary papers

Owari, T., Nakagawa, Y., Inukai, H. (2012) Determinants of spatially explicit classification decisions in natural forest management in central Hokkaido, Japan. Journal of Forest Planning, in press

Tatsumi, S., Owari, T., Toyama, K., Shiraishi, N. (2012) Adaptation of a spatially-explicit individual-based forest dynamics model SORTIE-ND to conifer-broadleaved mixed stands in the University of Tokyo Hokkaido Forest. Forest Resource Management and Mathematical Modeling, 11: 1-26

Owari, T., Kimura, N., Shimizume, M., Takuma, R., Nakagawa, Y., Tookuni, M. (2011) Using global positioning system (GPS) technology for tree marking in a natural forest under a single-tree selection system. Forest Resource Management and Mathematical Modeling, 10: 105-121

Owari, T., Matsui, M., Inukai, H., Kaji, M. (2011) Stand structure and geographic conditions of natural selection forests in central Hokkaido, northern Japan. Journal of Forest Planning, 16: 207-214

Owari, T., Kamata, N., Tange, T., Kaji, M., Shimomura, A. (2011) Effects of silviculture treatments in a hurricane-damaged forest on carbon storage and emissions in central Hokkaido, Japan. Journal of Forestry Research, 22(1): 13-20 (doi: 10.1007/s11676-011-0118-3)

Sasaki, N., Owari, T., Putz, F.E. (2011) Time to substitute wood bioenergy for nuclear power in Japan. Energies, 4(7): 1051-1057 (doi: 10.3390/en4071051)

Owari, T., Sawanobori, Y. (2008) Market benefits of chain-of-custody certification: perspectives of Japanese suppliers. Forest Resource Management and Mathematical Modeling, 7: 121-133

Owari, T., Sawanobori, Y. (2007) Analysis of the certified forest products market in Japan. European Journal of Wood and Wood Products, 65(2): 113-120 (doi:10.1007/s00107-006-0166-0)

Owari, T., Juslin, H., Rummukainen, A., Yoshimura, T. (2006) Strategies, functions and benefits of forest certification in wood products marketing: perspectives of Finnish suppliers. Forest Policy and Economics, 9(4): 380-391 (doi:10.1016/j.forpol.2005.10.005)