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Featured researches published by Takuyuki Yoshioka.


Journal of Forestry Research | 2012

Effects of acquiring FSC forest management certification for Japanese enterprises using SmartWood Audits

Katsuaki Sugiura; Takuyuki Yoshioka; Kouki Inoue

We explore the organizational, environmental, and economic effects of sustainable forest management (FM) certification by Smart-Wood (SW), one of the certification bodies accredited by the Forest Stewardship Council (FSC) to carry out certification in Japan. We closely investigated three enterprises: the Yusuhara Forest Owners’ Cooperative, Yamanashi Prefectural Forest, and Ryujin-mura Forest Owners’ Cooperative. Interviews with representatives of these entities provided crucial empirical information regarding the influence of certification on environmental assessment, rare-species protection, landscape-management planning, management objectives, and forest supervision. Attainment of FM status improved environmental awareness and engendered positive changes in assessing and managing forests and other natural resources but simultaneously imposed heavier economic costs.


Forest Science and Technology | 2013

Improvement of forest management in Asia, through assessment of Forest Stewardship Council certification

Katsuaki Sugiura; Takuyuki Yoshioka; Koki Inoue

The purpose of this study was to compare the present condition of forest management in Asian countries using results of evaluations from Forest Stewardship Council (FSC) certification bodies. In recent years, the number of FSC-certified forests has increased in Asia. Our investigation examined certified forests in Asian countries, which, as of 2009, accounted for 2.39% of total global certified forest area (2,761,603 ha). Materials were taken from summary evaluations published by each FSC certification body on its respective website. The FSC uses 10 principles and 56 criteria in its evaluation. We investigated the items that the FSC certification bodies consider to be areas that require improvement. Of these principles and criteria, the following were cited by the certification bodies as RI (requiring improvement) in nearly all Asian countries: principle four, “community relations and workers rights”; principle six, “environmental impacts”; principle seven, “management plan”; and principle eight, “monitoring and assessment”. In addition, there were differences corresponding to each country with respect to the other principles and criteria. Laos, Indonesia, and Malaysia in particular were found to have a number of problems. Thus, while there were differences in the principles that qualified as RI in each country, there were also common weak points that require improvement throughout the continent. Asian countries should be mindful of these deficiencies and take measures to improve them, in order to achieve sustainable forest management practices.


Biomass & Bioenergy | 2005

Woody Biomass Resources and Conversion in Japan : The Current Situation and Projections to 2010 and 2050

Takuyuki Yoshioka; Satoshi Hirata; Yukihiko Matsumura; Kinya Sakanishi


Biomass & Bioenergy | 2006

A case study on the costs and the fuel consumption of harvesting, transporting, and chipping chains for logging residues in Japan.

Takuyuki Yoshioka; Kazuhiro Aruga; Toshio Nitami; Hideo Sakai; Hiroshi Kobayashi


Biomass & Bioenergy | 2011

A GIS-based analysis on the relationship between the annual available amount and the procurement cost of forest biomass in a mountainous region in Japan.

Takuyuki Yoshioka; Rin Sakurai; Kazuhiro Aruga; Hideo Sakai; Hiroshi Kobayashi; Koki Inoue


Croatian Journal of Forest Engineering | 2011

Discussion on economic and energy balances of forest biomass utilization for small-scale power generation in Kanuma, Tochigi Prefecture, Japan.

Kazuhiro Aruga; Ayami Murakami; Chikara Nakahata; Reiko Yamaguchi; Takuyuki Yoshioka


Croatian Journal of Forest Engineering : Journal for Theory and Application of Forestry Engineering | 2012

Application of a Sugarcane Harvester for Harvesting of Willow Trees Aimed at Short Rotation Forestry: an Experimental Case Study in Japan

Takuyuki Yoshioka; Katsuaki Sugiura; Koki Inoue


Journal of The Japanese Forest Society | 2017

Biomass-related Studies in the Japanese Forest Society and the Feed-in Tariff Scheme for Renewable Energy (FIT)

Takuyuki Yoshioka; Kazuhiro Aruga


Journal of The Japanese Forest Society | 2017

Current and Future Fuel Supply for Electric Power Generation Plants from Woody Biomass in Kochi Prefecture, Japan

Yasushi Suzuki; Kazuhiro Aruga; Takuyuki Yoshioka; Keisuke Toyama; Masashi Saito; Hiroaki Sirasawa; Shin Yamasaki


Forests | 2017

The Optimum Slash Pile Size for Grinding Operations: Grapple Excavator and Horizontal Grinder Operations Model Based on a Sierra Nevada, California Survey

Takuyuki Yoshioka; Rin Sakurai; Shohei Kameyama; Koki Inoue; Bruce R. Hartsough

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