Authorship：Lead author,　Last author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)  

Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.3390/f13040561

Web of Science

Scopus

Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： doi.org/10.3390/f13040561

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

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：木材利用システム研究会  

DOI： 10.34494/jwus.8.0_9

CiNii Research

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

DOI： 10.3390/su132212731

Web of Science

Scopus

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japan International Forestry Promotion and Cooperation Center  

DOI： 10.32205/jjjiff.111.0_3

CiNii Research

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Informa UK Limited  

DOI： 10.1080/13416979.2021.1955438

Web of Science

Scopus

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

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：FOREST ECONOMIC RESEARCH INSTITUTE  

DOI： 10.19013/rinrin.74.5_15_1

CiNii Research

Authorship：Lead author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)  

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

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

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

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

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

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

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

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：国立研究開発法人森林研究・整備機構 森林総合研究所  

Downturns in Japanese timber prices are currently discouraging the participation of Japan's forest owners inmanagement practices, to the extent that timberlands are being sold and reforestation and renewal projects are being abandoned. In contrast, some corporate entities that actively require a timber supply are engaging in, and evenexpanding, forest management investment; long-term forest management are also being established. Thus, Japan'sapproach to forest management is undergoing reorganization.In 2008, we had an opportunity to discuss with two major financial institutions about the possibility of the foresttrust in Japan. This study aims to clarify the factors regarding main difficulties of the forestry business through theforest trust indicated by major financial institutions. The obstacles that these institutions faced included uncertaintyin securing cash flow for forestry projects, a potential shortage of cooperating experts and financial institutions, andinstability in the physical status of and rights to the forest properties. In the context of these issues, we describe the conditions affecting the commodification of the forest industry, which has allowed the formation of forestry business active in Japan today.

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

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：JAPAN INT RESEARCH CENTER AGRICULTURAL SCIENCES  

REDD+ is an approach to reduce deforestation and forest degradation, using economic incentives to influence behavior. The need for safeguards has emerged to avoid the negative social and environmental impacts caused by an overemphasis of such economic incentives. In the context of safeguards, in addition to the UNFCCC's official efforts, voluntary activities (initiatives) by many organizations have attempted to formulate principles, criteria, indicators and guidelines. In this article, we clarified the elements to enhance social safeguards and discussed how those elements are included in each initiative. We reviewed the literature on the SEPC, SESA and REDD+ SES initiatives, and clarified the focal points and problems relating to social safeguards. We found that benefit-sharing is an important aspect of social safeguards, and that more discussions are needed to enhance initiatives. The REDD+ SES initiative has received little criticism in literature to date and has the best-covered elements including "benefit-sharing" among the three initiatives. If more countries adopt REDD+ SES and more cases can be accumulated to identify problems and solutions, it could become a popular initiative in the international community to enhance the social safeguards in REDD+.

DOI： 10.6090/jarq.51.31

Web of Science

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：一般財団法人 林業経済研究所  

「ランド・スペアリング」は、一定の土地の生産性を高めることで、その他の土地の生物多様性保全を図る概念である。ランド・スペアリングのアプローチは、今後予想される人口増加に伴う食糧安全保障と生物多様性保全との両立のあり方を検討する目的で議論されてきた。本研究ではこの概念を援用し、集約的な土地利用の1つであるアブラヤシ農園の開発が自然保護区および地域社会に与えた影響を検討することで、アブラヤシ農園のランド・スペアリングとしての機能を評価した。インドネシア、西カリマンタン州に位置するアブラヤシ農園およびグヌンパルン国立公園に隣接する集落において、60世帯を対象とした訪問面接調査を行った。その結果、アブラヤシ農園の開発に伴い、地域住民の主たる生計手段が違法伐採を含む伐採労働からアブラヤシ農園からの収入へと変化し、国立公園の森林資源保全に寄与したことが確認され、アブラヤシ農園のランド・スペアリングとしての機能が示された。一方、世帯間においてはアブラヤシ農園収入の多寡に応じた経済的格差が認められ、今後さらに拡大することが懸念された。

DOI： 10.19013/rinrin.70.6_1

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

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

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

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

Authorship：Lead author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：林業経済学会  

In Java Island, Indonesia, where shows active utilization of private forest (PF) timber by timber processing industry, the relation between behaviors by the government, timber processing company, sawmill and farmer and the transition of forest area was analyzed. The most effective policy was request for acquisition of certification for a place of timber's origin. In Tasikmalaya District, the check of certification grasped the real situation of timber utilization. Meanwhile, the demand expansion of PF timber increased amount of timber production by farmers and decreased forest area. Tree planting by farmers increased forest area in 2007. However, because of continuous of purchasing price increase, timber cutting was continued at a faster rate than plantation and it decreased forest area in 2010. Furthermore, sawmills were established in associate with demand expansion and the total capacity of sawmilling was exceed timber supply in amount. As a result, sawmills fell into timber shortage. From these results, the flow "decrease of natural forest area → shortage of timber supply → utilization of PF timber → increase of PF area" and the existence of next scenario "increase of PF timber utilization → decrease of PF area" was clarified.

CiNii Books

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

Language：English   Publishing type：Research paper (scientific journal)   Publisher：JAPAN SOCIETY OF TROPICAL ECOLOGY  

Forestland allocation (FLA) policy in Vietnam aimed at conserving forests and improving local livelihoods. In regard to the effectiveness of FLA, some authors reported improvements in forest cover and quality, whereas others stated inappropriate implementation process and minor impacts on household income. Hence, this study examined whether disturbances in initial stage still existed, how allocated forestlands were utilized, and how FLA contributed to local livelihoods under different forest management regimes. D village of Nam Dong district, where FLA was introduced in 1995, was selected as a case, and 78 households were randomly selected for household interviews. The results revealed that shifting cultivation, once widely reported in mountainous regions, had already ceased before our survey. Natural forests allocated to groups were mainly utilized for non-wood forest product (NWFP) collection, regardless of whether those users had an allocation. Individually allocated areas were converted to acacia and recently to rubber plantations. The rotation of acacia plantation was five to seven years with intercropping cassava in the initial stage. FLA contributed to adjusting an uneven distribution of farmland and income, but the effect remained nominal. The role of FLA in income generation was limited due to small allocation area per household (1.50ha on average). Switching to rubber trend was another reason of limited income derived from FLA. Therefore NWFP played a more significant role in the household economy than plantation yields. Investment in livestock was first preference of respondents, which suggests the importance of small-scale livestock rearing in the areas facing land shortage.

DOI： 10.3759/tropics.24.169

Web of Science

CiNii Books

Other Link： https://jlc.jst.go.jp/DN/JLC/20021065888?from=CiNii

Language：English   Publishing type：Research paper (scientific journal)   Publisher：JAPAN SOCIETY OF TROPICAL ECOLOGY  

This study aimed to discover the status of several types of forest and based on the opportunity costs of REDD+ to identify which greenhouse gas (GHG) emission mitigation options can be implemented in different forest types in Ba Be National Park, Vietnam. From 1990 to 2000, forest in the study area faced a high rate of forest cover loss and degradation. During the next decade from 2000 to 2010, total forest cover increased gradually. However, the natural forest area still decreased. In our household survey (n＝103), respondents reported that main drivers of deforestation and forest degradation in those areas were timber extraction for commercial or subsistence purposes, shifting cultivation, inadequate forest management, bribes to forest rangers, felling trees for firewood and bamboo shoots, and conversion to Mo (Manglietia conifera) and other perennial plants. There are some differences in those drivers between the three villages surveyed. From 2000 to 2010, several land use changes such as the conversion of poor timber forest into recovered timber forest, medium timber forest into poor timber forest and planted forest into bare land with scattered trees caused more than 8,000tCO2e emissions per year. In regard to opportunity costs, most of the avoidance options have negative opportunity costs, which mean potential benefits. Within the current carbon market price, the avoidance can be applied to reduce approximately 7,900tCO2e emissions (about 98% reduction) per year in the three communes surveyed.

DOI： 10.3759/tropics.24.153

Web of Science

CiNii Books

Other Link： https://jlc.jst.go.jp/DN/JLC/20021065932?from=CiNii

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Inderscience Enterprises Ltd.  

Indonesia is rapidly progressing in terms of reducing emissions from deforestation and forest degradation (REDD plus) preparedness. We carried out a detailed feasibility study to develop and implement a new mechanism of the REDD plus for Central Kalimantan, a REDD pilot province of Indonesia. Several REDD plus activities were implemented in Paduran Mulia Village of Central Kalimantan. Remote sensing data was used to detect land use changes in the study area and was complemented by ground inventory to assess the actual carbon stock of the forest. The study found that land cover and uses have significantly been changed since last 30 years. Considering 2008 as a base year, we estimated that the total emission reduction would be 9,344 Gg CO2 in the next 20 years (about 450 Gg CO2/year). The results indicated the optimistic scenario with significant emission reduction if the proposed REDD plus activities were implemented successfully.

DOI： 10.1504/IJESD.2016.073334

Scopus

Authorship：Lead author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：林業経済学会  

Oil palm plantation has a negative impact on Global warming on particularly on peat land that is not suitable for agriculture. This survey focuses on two factors that change the source of income and economic condition of the local people in Central Kalimantan where peat land abounds, and the perception that oil palm plantation requires conversion of custom land where traditionally utilized by them. It also clarifies the impact of the establishment phase of oil palm plantations on employment and the local society. And, based on the results, we discuss desirable livelihood strategy for local people. Findings of the survey confirm that the main source of income for young households is oil palm plantations that engage them as labor while the older households' income come from managing small private rubber plantations. However, households engaged as labor in oil palm plantations also wished to own rubber plantations and were concerned about losing custom land that the oil palm plantation companies were buying. The local people are largely dependent on uncertain plantation labor for their livelihood, and as they do not have many alternative sources of income, it is necessary for them to lower any risk by retaining custom land, which is one of their important sources of income.

CiNii Books

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

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

Authorship：Lead author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：林業経済学会  

To improve the livelihood of local people involved in the Reducing Emissions from Deforestation and Forest Degradation and the role of conservation, sustainable management of forests and enhancement of forest carbon stocks in developing countries (REDD+) project, we examined the necessary factors to incorporate Melaleuca (Melaleuca cajupti) timber production as a new income source. At PM Village, with Central Kalimantan as research target, we conducted Project Cycle Management (PCM) to investigate Melaleuca timber production. Findings clarified that the main problem was access to the timber market. Therefore, we conducted market surveys to search for and develop a distribution channel. We discovered two markets for Melaleuca timber; market of a small-diameter timber and a middle-diameter timber. Eventually, it became apparent that there was no room to enter the small-diameter market. In the middle-diameter market, a shortage of timber was occurring simultaneously with an increase in Melaleuca demand because the amount of timber available from Kalimantan (e.g., Meranti: Shorea spp.) had decreased. In PM Village, there were no middle-diameter trees, so forest management (i.e., silviculture) was identified as an objective for the area. Moreover, forest management in this area has become additionality of the REDD+ project. Accordingly, it is anticipated that Melaleuca grown in peatlands will generate profitable income for REDD+ projects in other peatland areas.

CiNii Books

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Scientific Research Publishing, Inc.  

DOI： 10.4236/ojf.2014.44040

Other Link： http://www.scirp.org/journal/doi.aspx?DOI=10.4236/ojf.2014.44040

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (international conference proceedings)  

Authorship：Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：森林計画学会  

Large-scale forest development, natural forest harvesting, and oil palm planting have created employment opportunities for rural people in transmigration villages in Indonesia. However, large-scale forest development is expected to decline owing to the introduction of the REDD+ scheme. This study aimed to discuss the problems of implementing REDD+ from the perspective of the livelihood structure and land-use system in the PM transmigration village in Pulang Pisau District, Central Kalimantan Province. The majority of migrant workers in the village were engaged in forest development. In addition, the trend of occupations in Central Kalimantan Province was consistent with its history of forest development. In PM village, 55.3% of owned land was not utilized, and subsistence crop cultivation and rubber planting were conducted on a part of owned land. All cultivation and planting activities were conducted on owned or leased lands in the village; therefore, the surrounding national forest was not required to be cleared for cultivation or rubber-planting activities. Households engaged in migrant work and who had accumulated land abandoned by other villagers were involved in rubber-planting activities. Therefore, in the case of transmigration villages who have accumulated land through population exodus, assistance in tree crop cultivation would be effective to create a future cash income source as an alternative to forest development-related employment opportunities.

DOI： 10.20659/jjfp.46.2_45

CiNii Books

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

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

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

Authorship：Lead author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：林業経済学会  

In Java, where private forest area has been recently increasing, I examined the relations between Timber Processing Company B and farmers, who produce timber sourced from the private forests, through contract planting that implemented by Company B. A field survey in Tasikmalaya District, where the most contract planting was undertaken as compared to the rest of Java, revealed that, from 1999, farmers had been undertaking tree planting and harvesting according to the prices offered by the company. Because of the lack of supply control, the company resorted to contract planting. Contract planting was undertaken on both private land and government-owned agricultural estate land. The ratio of intercropping, which reflects diverse management strategies, was higher in the latter, as in private land without contract planting. Moreover, households that undertook planting on private land were likely to do so with a focus on timber production. These facts imply that contract planting on private land is quite favorable for the stable supply of timber production. However, there is the risk of the company purchasing the timber at lower prices because it has discretion to decide the time of harvest and purchase price.

CiNii Books

Authorship：Lead author,　Corresponding author   Language：Japanese   Publishing type：Doctoral thesis  

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：筑波大学農林技術センター  

CiNii Books

Authorship：Lead author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：筑波大学農林技術センター  

CiNii Books

Authorship：Lead author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：林業経済学会  

This study aimed at examining what kind of people would support conversion of farmland to tree plantations under the framework of National Movement of Rehabilitation of Forests and Land, a nation-wide afforestation program started in 2003. Wonogiri district, an agricultural marginal area, was selected as the case and interviews to randomly selected participants of the program in 2003 were conducted at three villages. The results revealed that the differences in geographical conditions at village level, either flat easy-access or mountainous hard-access, did not much affect the performance of the program. Significant relations were found at the household level in: (1) gross income from non-agricultural sector and motivations and (2) motivations and arrangement of seedlings. And, it was clarified that the stakeholders, who could create private forest, were people who aimed at plantation itself and who planted according to "government's manual". From these results, we concluded that to increase the rate of getting mature forest, it is necessary to decrease given incentive in order to exclude people who do not aim at plantation itself.

CiNii Books

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

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

Language：Japanese

Language：Japanese

Total pages：179   Responsible for pages：12-13頁   Language：Japanese Book type：Dictionary, encyclopedia

Language：Japanese

Total pages：23   Language：Japanese

Responsible for pages：51-66頁   Language：Japanese

Responsible for pages：29-44頁   Language：Japanese

Language：Japanese   Publishing type：Research paper, summary (national, other academic conference)  

Language：Japanese   Publishing type：Book review, literature introduction, etc.  

Language：Japanese   Publisher：林業経済学会  

CiNii Books

Language：English   Publisher：JAPAN SOCIETY OF TROPICAL ECOLOGY  

DOI： 10.3759/tropics.24.139

Language：Japanese   Publishing type：Rapid communication, short report, research note, etc. (scientific journal)  

Language：English   Publishing type：Research paper, summary (international conference)  

Language：Japanese   Publishing type：Book review, literature introduction, etc.   Publisher：日本森林学会  

DOI： 10.11519/jjsk.71.0_45_1

Language：Japanese   Publishing type：Rapid communication, short report, research note, etc. (bulletin of university, research institution)   Publisher：筑波大学農林技術センター  

CiNii Books

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Publisher：国際緑化推進センター  

CiNii Books

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Publisher：国際緑化推進センター  

CiNii Books

Language：Japanese   Publishing type：Research paper, summary (national, other academic conference)   Publisher：THE JAPANESE FORESTRY SOCIETY  

Event date： 2021.1

Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

Venue：オンライン   Country：Japan  

Event date： 2020.12

Language：Japanese  

Venue：ウェブサイト   Country：Japan  

Event date： 2020.10

Language：Japanese  

Venue：オンライン   Country：Japan  

Event date： 2020.9

Language：Japanese   Presentation type：Symposium, workshop panel (nominated)  

Venue：オンライン（名古屋大学）   Country：Japan  

Event date： 2019.6

Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

Event date： 2018.6

Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

Event date： 2009

Language：Japanese   Presentation type：Oral presentation (general)  

Language：Japanese   Presentation type：Symposium, workshop panel (nominated)  

Venue：オンライン   Country：Japan  

Language：English   Presentation type：Oral presentation (general)  

<p>[in Japanese]</p>

DOI： 10.11519/jfsc.132.0_229

CiNii Research

Type：Peer review