Faculty Profiles - IWANAGA Seiji

Papers - IWANAGA Seiji

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＜書評＞日本・アジアの森林と林業労働, 信州大学森林政策学研究会編, 小池正雄・三木敦朗監修, 川辺書林, 2013年9月, 335ページ, 2,160円(税込), ISBN978-4-906529-76-6

岩永青史

森林科学 Vol. 71 ( 0 ) page： . 2014

Effects of contract tree farming by timber processing companies on forest resources:A case study in Tasikmalaya, West Java, Indonesia Reviewed International coauthorship

Iwanaga S, Wijaya CI

Proceedings of 12th Science Council of Asia Conference page： 67 - 68 2013

Effect on forest of employment structure and land use in transmigration village, Central Kalimantan, Indonesia : Discussion of problems in implementing REDD plus Reviewed

Onda Nariaki, Iwanaga Seiji, Anakura Natsuko, Wijaya Chandra Irawadi, Amano Masahiro

Japanese Journal of Forest Planning Vol. 46 ( 2 ) page： 45 - 56 2013

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

Shift in raw materials for the wood processing industry in Java Island, Indonesia: A perspective from the post natural forest era Reviewed

Iwanaga S, Masuda M

TROPICS Vol. 22 ( 3 ) page： 119 - 129 2013

Policies and resource situations of private forests in Indonesia : A case study in Tana Toraja District, South Sulawesi Province

( 28 ) page： 101-112 2012.3

Trial for Local People's Forestry Establishment in Partnership with Timber Processing Company in Indonesia

Vol. 0 ( 83 ) page： 42-47 2012.1

Effects of Contract Planting by Timber Processing Companies for Farmers : A Case Study in Tasikmalaya, West Java, Indonesia Reviewed

IWANAGA Seiji

Journal of Forest Economics Vol. 58 ( 2 ) page： 14 - 22 2012

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

ポスト天然林時代におけるジャワ島の木材加工産業の資源戦略と私有林の役割 Reviewed

岩永青史

筑波大学 page： 1 - 82 2012

Production and distribution system of nipa-shingle in the Philippines Reviewed

飯田祥史, 岩永青史, 増田美砂

Bulletin of Tsukuba University Forests ( 27 ) page： 109 - 122 2011.3

Strategy of a timber processing company for ensuring raw materials and supply potential of private land: a case study in Tasikmalaya, West Java, Indonesia Reviewed

岩永青史, 赤羽洋, 御田成顕

Bulletin of Tsukuba University Forests ( 26 ) page： 1 - 16 2010.3

Preference of Farmers in a Nation-wide Afforestation Program and the Possibility to Create Private Forests : A Case Study in Wonogiri District, Central Java Reviewed

IWANAGA Seiji, SHIGA Kaori, DAMAYANTI Ellyn K, MASUDA Misa

Journal of Forest Economics Vol. 55 ( 2 ) page： 1 - 9 2009

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

Conservation, rehabilitation and utilization of tropical forest for the future generation: the session report from the 119th annual congress of the Japanese Forest Society

Japanese journal of international forest and forestry ( 72 ) page： 45-49 2008.6

Production and distribution of nipa shingles in the Philippines:Case study in Camarines Norte province, Bicol Region

IWANAGA SEIJI, IIDA YOSHIFUMI

The Japanese Forest Society Congress Vol. 119 ( 0 ) page： 198-198 2008

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