Faculty Profiles - IWANAGA Seiji

Papers - IWANAGA Seiji

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Incentives for forest certifications in Vietnam: a case of the North Central region

Iwanaga S., Long T.V., Le T.T.T., Van Minh N., Tuan H.H.

Journal of Forest Research 2024

Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Forest Research

The area of planted forests is continuously expanding to meet the demand for timber, while curbing the loss of natural forests. Additionally, the sustainability of timber production is also attracting attention, and the number of forest certifications acquired by local people is increasing. In the North Central Region of Vietnam, where forest certification has been most actively acquired by the local people, participation accelerators and bottlenecks for the forest certification group were extracted by identifying the incentives for 50 group members to acquire forest certification, the reasons for not acquiring forest certification for 47 non-members, and the process of acquiring land rights for planted forests by conducting semi-structured interviews. Consequently, many members joined the certification group for economic reasons, while more than 60% of the non-members did not join because of the longer harvesting rotation. By focusing on the land use rights acquisition process, it became clear that outsiders buy land use rights and plant trees. The land they acquired was larger than the land owned by the villagers, and all were forest certified. It can be said that out-of-village landowners contribute significantly to the expansion of forest certification. However, there are concerns that the overconcentration of land rights will widen economic disparities within regions and that forests, which serve as a safety net for local people, will disappear.

DOI： 10.1080/13416979.2024.2324207

Scopus

A study of trail maintenance utilizing volunteers in Chubusangaku National Park

Hori Akiho, Iwanaga Seiji, Harada Kazuhiro

The Japanese Forest Society Congress Vol. 134 ( 0 ) page： 87 2023.5

Trends of private forest ownership and the role of forest owners’ associations in Norway

Iwanaga Seiji, Sato Noriko, Koga Shiori

page： 46 - 53 2023.5

Language：English Publishing type：Research paper (scientific journal)

This study gives insight into the trends of individual private forest ownership and forest management in Norway. Contrary to Japanese forest management, larger forest areas are actively managed by private owners and forest owners’ association (FA) are more active in Norway. The questionnaire survey using Google Form was conducted for members of two of the four FAs in Norway. One of the FAs is Glommen Mjøsen Skog (64 respondents with an average forest area of 453 ha). The members of Glommen Mjøsen Skog own larger properties suitable for forestry. The other is Allskog (41 respondents with an average forest area of 198 ha). Allskog’s members are located on the west coast of Norway where forestry is more difficult due to many steep slopes and the smaller properties. Both FAs’ members were interested in expanding their properties for the purpose of “expanding forestry management” and “asset formation”. In Allskog, 10 of the respondents (24%) purchased 114 ha on average in the past five years. On the other hand, 15 of the respondents in Glommen Mjøsen Skog answered that they expanded their property with 187 ha on average. More than 50% of the respondents in Glommen Mjøsen Skog have successors, while 40% in Allskog. The results indicate that there is a difference in the attractiveness of forest ownership and forestry. Regarding the operation of forest management, 47% and 59% answered “done by respondents themselves or their family members” in Glommen Mjøsen Skog and in Allskog, respectively. Similarly, 19% and 41% answered that harvesting was implemented by “respondents themselves or their family members” in Glommen Mjøsen Skog and in Allskog, respectively. Because members in Allskog own smaller properties, it seems that forest owners have a tendency to carry out all operations by themselves or their family members.

CiNii Research

ノルウェーの森と

岩永青史

農中総研調査と情報 Vol. 2023.01 ( 94 ) page： 22 - 23 2023.1

Report on the 133nd Annual JFS Meeting Workshop “Gather! Forest of Conference”

Takada Noriyo, Iwanaga Seiji, Kimura Megumi, Yamagawa Hiromi, Nanko Kazuki, Takeuchi Hiroe, Takayama Norimasa

Journal of the Japanese Forest Society Vol. 105 ( 5 ) page： 187 - 190 2023

Statistical analysis regarding contribution of local timber to timber self-sufficiency rate rising Reviewed

IWANAGA Seiji

Vol. 70 page： 47 - 50 2022.6

Determinants and Challenges of Community Sand Forest Management in Vietnam Reviewed International coauthorship International journal

Hoang Huy Tuan, Nguyen Van Minh, Nguyen Thi Hong Mai, Tran Thi Thuy Hang, Seiji Iwanaga

Forests Vol. 13 ( 4 ) page： 561 - 561 2022.4

Determinants and Challenges of Community Sand Forest Management in Vietnam Reviewed International coauthorship

Hoang Huy Tuan, Nguyen Van Minh, Nguyen Thi Hong Mai, Tran Thi Thuy Hang, Seiji Iwanaga

forests Vol. 13 page： 561 2022.3

Domestic large-diameter log use in the Japanese lumber manufacturing industry: focusing on regional differences Reviewed International journal

Seiji Iwanaga, Masato Hayafune, Wataru Tanaka, Yuji Ikami

Journal of Forest Research Vol. 27 ( 1 ) page： 8 - 14 2022.1

Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Informa UK Limited

Japan's postwar policies with respect to forestry management have led to the aging of planted forests and a shift toward large-diameter logs that has created a challenge for how to use such logs in the lumber manufacturing industry. In recent years, medium-diameter logs have been the predominant type, and there has been less demand for large-diameter logs. This study examines the Japanese lumber manufacturing industry's consumption of domestic timber using survey data from 21 member companies of the Domestic Timber Sawmill Association. The results suggest that regional characteristics and the tree species consumed are the two main factors that drive the decision to use large-diameter logs. While current demand for large-diameter logs is considered low, the results show that demand is present, and there are signs of growing consumption of these logs within the lumber manufacturing industry. As the current machinery that handles medium-diameter logs depreciates, it is expected that companies will respond by either introducing machinery that can accommodate large-diameter logs or changing their products.

DOI： 10.1080/13416979.2021.1998949

Web of Science

Scopus

再利用木材の流通と市場における課題に関する研究

佐野百香, 岩永青史

木材利用システム研究 Vol. 8 ( 0 ) page： 9 - 12 2022

Participation of Local People in the Payment for Forest Environmental Services Program: A Case Study in Central Vietnam Invited Reviewed International coauthorship International journal

Hoang Phan Bich Ngoc, Takahiro Fujiwara, Seiji Iwanaga, Noriko Sato

Sustainability Vol. 13 ( 22 ) page： 12731 - 12731 2021.11

Actual situations and challenges of timber legality assurance system in Indonesia

Kitayama Shun, Iwanaga Seiji, Harada Kazuhiro

Japanese Journal of International Forest and Forestry Vol. 111 ( 0 ) page： 3 2021.8

Challenges of the Payment for Forest Environmental Services (PFES) program in forest conservation: a case study in Central Vietnam Reviewed International coauthorship International journal

Hoang Phan Bich Ngoc, Takahiro Fujiwara, Seiji Iwanaga, Noriko Sato

Journal of Forest Research Vol. 26 ( 6 ) page： 1 - 10 2021.8

Changes in the Vietnamese Timber Processing Industry: A Case of Quang Tri Province, North Central Region Reviewed International coauthorship International journal

Seiji Iwanaga, Dang Thai Hoang, Hirofumi Kuboyama, Dang Thai Duong, Hoang Huy Tuan, Nguyen Van Minh

Forests Vol. 12 ( 8 ) page： 984 - 984 2021.8

Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：MDPI AG

Vietnam’s forestry policies have expanded the area of planted forests in order to meet the supply of raw materials for the timber processing industry. However, the diversity and volume of demand in the industry have also increased, and a shortage of raw materials can be assumed. For clarifying the correspondence of stakeholders, we explore changes in the resource supply behavior of forestry companies and procurement strategies of companies that manufacture lumber for glued laminated timber, medium density fiberboard (MDF) and wood pellets. Next, we discuss issues and future developments surrounding the supply and demand for timber from planted forests. According to a survey of Quang Tri Province, both industrial and on-farm tree planting play an important role in Vietnam’s wood industry. The origin of the supply has been categorized according to its purpose (products). On the other hand, with the declining supply of imported timber and natural forest timber, inquiries from sawmills and glued laminated timber factories for timber from planted forests have increased, and wood pellet manufacturers are facing competition for raw material procurement with MDF manufacturers, and the supply of timber from planted forests is becoming scarce. The key to the solution lies in improving the low productivity of current on-farm tree planting. To this end, forming farmer groups upon the acquisition of forest certification will help achieve economies of scale and bargaining power.

DOI： 10.3390/f12080984

Web of Science

Scopus

3. Vietnamese Forest Resource Strategies: Shift in Raw Materials to Plantation Forest Timber (The 2020 Spring Symposium held by the Japanese Forest Economic Society “Southeast Asian Forestry in the Post-natural Forest Era”)

IWANAGA Seiji

FOREST ECONOMY Vol. 74 ( 5 ) page： 15 - 15 2021

製材業における国産大径材利用の実態と課題 Reviewed

岩永青史, 早舩真智, 田中亘, 伊神裕司

中部森林研究 Vol. 68 page： 57 - 58 2020.6

Impact of policies on raw material procurement in the Vietnamese timber processing industry: a case study of sawmills in Hue City Reviewed International coauthorship International journal

Seiji Iwanaga, Dang Thai Duong, Ngyen Van Minh

Journal of Forest Research Vol. 25 ( 2 ) page： 59 - 68 2020.3

Vietnamese Forest Resource Strategies: Shift in Raw Materials to Plantation Forest Timber Invited Reviewed

Seiji IWANAGA

Journal of Forest Economics Vol. 66 ( 1 ) page： 35 - 44 2020.3

Policy effects for forest conservation and local livelihood improvements in Vietnam: a case study on Bach Ma National Park Reviewed International coauthorship International journal

Seiji Iwanaga, Shigeki Yokoyama, Dang Thai Duong, Nguyen Van Minh

Journal of Forest Research Vol. 24 ( 5 ) page： 267 - 274 2019.8

東南アジアにおける木質面材の生産、消費、輸出入の動向

岩永青史, 早舩真智

木材情報 Vol. 339 page： 10-13 2019.8

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