研究者詳細 - 岩永　青史

論文 - 岩永　青史

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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年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：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

中部山岳国立公園におけるボランティアを活用した登山道整備に関する研究

堀彰穂, 岩永青史, 原田一宏

日本森林学会大会発表データベース 134 巻 ( 0 ) 頁： 87 2023年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：日本森林学会

<p>　本研究の目的は、国立公園における登山道整備において、ボランティアを活用した整備について着目し、新たな担い手としてのボランティアによる整備の可能性とその課題について検討することである。そこで、登山者に対して、登山者への登山道を取り巻く課題の認知や、ボランティアによる整備への意識についてのアンケート調査を実施した。</p><p>　アンケート結果より、回答者の約79％は、登山道整備のボランティア活動について「興味がある」と回答しており、登山道整備の新たな担い手としての可能性を有していることが明らかになった。一方で、「ボランティア募集の案内を見たことがあるか」について、約20％の回答者が「見たことがない」と回答しており、周知について課題があることが分かった。また、登山道整備ボランティアについて「興味がない」と回答した者ついて分析を行った。その結果、興味が無い主な理由として「技術が無い」ことを挙げており、また、「技術が無い」と回答した者の半数以上が女性であった。このことから、技術が不要かつ男女問わず参加できる多様な作業項目があることについての周知・広報が求められることが明らかになった。</p>

DOI： 10.11519/jfsc.134.0_87

CiNii Research

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

Iwanaga Seiji, Sato Noriko, Koga Shiori

頁： 46 - 53 2023年5月

記述言語：英語掲載種別：研究論文（学術雑誌）

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 2023.01 巻 ( 94 ) 頁： 22 - 23 2023年1月

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

Takada N., Iwanaga S., Kimura M., Yamagawa H., Nanko K., Takeuchi H., Takayama N.

Nihon Ringakkai Shi/Journal of the Japanese Forestry Society 105 巻 ( 5 ) 頁： 187 - 190 2023年

統計に見る木材自給率上昇への自県産材の貢献査読有り

岩永青史

中部森林研究 70 巻頁： 47 - 50 2022年6月

Determinants and Challenges of Community Sand Forest Management in Vietnam 査読有り国際共著国際誌

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

FORESTS 13 巻 ( 4 ) 頁： 561 - 561 2022年4月

担当区分：最終著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Forests

In the inland sandy areas along the central coast of Vietnam, there is a specific type of ecosystem that local people call a sand forest. Over time, despite many economic, political, and social upheavals, local people in some places still maintain these sand forests. In this study, we aimed to investigate the determinants and challenges of community sand forest management in coastal north central Vietnam. For this purpose, we explore insights regarding the changing roles of sand forests in community perception, community challenges, and the role of stakeholders in sand forest management. We then discuss policy implications for sustainable sand forest management. By ap-plying focus group discussions, household surveys, and in-depth interviews, this study found that local people have used village conventions to manage the sand forest for hundreds of years because they have been aware of the role of the sand forest in daily life, especially the spiritual and environmental roles of the sand forest. However, sand forest management is confusing and inefficient due to the neglect of the role of traditional organizations. Along with this, local people face several chal-lenges, such as conflicts over the use of sand forests, and a lack of recognition of the community’s legal rights to such forests. Based on these results, some policy implications are proposed, such as strengthening the participation of related stakeholders, and providing coordination between traditional organizations and local authorities in forest management and conflict management in forest use. It is necessary to promote the allocation of sand forests to local communities so that they have the legal rights to effectively manage and protect their forests and to obtain potential benefits in the future.

DOI： 10.3390/f13040561

Web of Science

Scopus

Determinants and Challenges of Community Sand Forest Management in Vietnam 査読有り国際共著

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

forests 13 巻頁： 561 2022年3月

Domestic large-diameter log use in the Japanese lumber manufacturing industry: focusing on regional differences 査読有り国際誌

Iwanaga Seiji, Hayafune Masato, Tanaka Wataru, Ikami Yuji

JOURNAL OF FOREST RESEARCH 27 巻 ( 1 ) 頁： 8 - 14 2022年1月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Forest Research

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 8 巻 ( 0 ) 頁： 9 - 12 2022年

Participation of Local People in the Payment for Forest Environmental Services Program: A Case Study in Central Vietnam 招待有り査読有り国際共著国際誌

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

SUSTAINABILITY 13 巻 ( 22 ) 頁： 12731 - 12731 2021年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Sustainability (Switzerland)

In 2010, Vietnam implemented the payment for forest environmental services (PFES) program that was expected to bring additional income to local people and improve the efficiency of forest protection. However, factors affecting the motivation to participate in PFES have rarely been examined. The objectives of this study were to (1) identify factors that influence local people’s participation in PFES, (2) examine how local people participating in the PFES program were involved in decision-making in the Thua Thien Hue Province, and (3) assess PFES impact on local people. We conducted a field survey of 32 households at the study site. We found no difference in the access to PFES between poor and non-poor households. Participation in PFES was considered a reward for labor work in forests and a means to compensate for the legal rights of participants. Local people could participate at many stages of PFES implementation; however, they were only passive spectators with regards to PFES management. Two-thirds of the participants did not participate in decision-making regarding PFES distribution. We conclude that the efficiency of future PFES programs may be increased by enabling and stimulating the participants to take a more active part in the process of PFES management and distribution.

DOI： 10.3390/su132212731

Web of Science

Scopus

インドネシアの木材合法性証明システム（SVLK）の実態と課題

北山舜, 岩永青史, 原田一宏

海外の森林と林業 111 巻 ( 0 ) 頁： 3 2021年8月

Challenges of the Payment for Forest Environmental Services (PFES) program in forest conservation: a case study in Central Vietnam 査読有り国際共著国際誌

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

JOURNAL OF FOREST RESEARCH 26 巻 ( 6 ) 頁： 1 - 10 2021年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Forest Research

In 2010, the Vietnamese government initiated the Payment for Forest Environmental Services (PFES) program to conserve forests and improve local livelihoods. While some researches have demonstrated the effectiveness of PFES, other studies reported inappropriate implementation and distribution at the initial stage. This study aimed to examine how PFES was implemented, and explore the challenges of forest protection efforts faced by the local people under PFES. Thua Thien Hue province was the first province to adjust the distribution of payments according to the type and quality of the forest using the K-coefficient. We conducted in-depth interviews with relevant staff and officials and organized focus group discussions with local people in seven payment areas in the province. The findings showed that the K-coefficient applied in this study was composed of four elements: forest condition (K1), forest function (K2), forest origin (K3), and the difficulty of forest protection (K4). However, forest condition (K1) was the only factor that could increase the efforts of the local people toward forest conservation. The capacity of the staff played an essential role in PFES distribution for local people. Additionally, establishing the relevant institutions and encouraging participation at the local level can increase forest conservation effectiveness. However, there is a lack of regulations for dealing with violations under the current rules. In conclusion, this study recommends expanding the range to calculate payouts, thereby increasing remuneration and motivation for the local people to be involved in forest conservation.

DOI： 10.1080/13416979.2021.1955438

Web of Science

Scopus

Changes in the Vietnamese Timber Processing Industry: A Case of Quang Tri Province, North Central Region 査読有り国際共著国際誌

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

Forests 12 巻 ( 8 ) 頁： 984 - 984 2021年8月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：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

第3報告　人工林材へと原料転換が進むベトナムの森林資源戦略（林業経済学会2020年春季大会シンポジウム：ポスト天然林時代の東南アジア林業）

岩永青史

林業経済 74 巻 ( 5 ) 頁： 15 - 15 2021年

製材業における国産大径材利用の実態と課題査読有り

岩永青史, 早舩真智, 田中亘, 伊神裕司

中部森林研究 68 巻頁： 57 - 58 2020年6月

Impact of policies on raw material procurement in the Vietnamese timber processing industry: a case study of sawmills in Hue City 査読有り国際共著国際誌

Seiji Iwanaga, Dang Thai Duong, Nguyen Van Minh

Journal of Forest Research 25 巻 ( 2 ) 頁： 59 - 68 2020年3月

人工林材へと原料転換が進むベトナムの森林資源戦略招待有り査読有り

岩永青史

林業経済研究 66 巻 ( 1 ) 頁： 35 - 44 2020年3月

Policy effects for forest conservation and local livelihood improvements in Vietnam: a case study on Bach Ma National Park 査読有り国際共著国際誌

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

Journal of Forest Research 24 巻 ( 5 ) 頁： 267 - 274 2019年8月

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 339 巻頁： 10-13 2019年8月

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