Updated on 2024/04/03


Yajima Naonari
Faculty of Economics Department of Economics Assistant Professor


  • 博士(経済学) ( 2022.3   早稲田大学 )

Research Areas

  • Humanities & Social Sciences / Economic policy

Educational Background

  • Waseda University   大学院経済学研究科 博士後期課程  

    2017.4 - 2022.3


Primary Subjects (Course) in charge

  • Environmental Economics Ⅰ

  • Environmental Economics Ⅱ

  • 市場と政府Ⅱ

  • 市場と政府Ⅰ



  • Green Policymaking in Japanese Municipalities: An Empirical Study on External and Internal Contextual Factors Reviewed

    Dries Couckuyt, Toshi H. Arimura, Takuro Miyamoto, Naonari Yajima

    Sustainability   15 ( 9 )   7449 - 7449   2023.4

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    Publishing type:Research paper (scientific journal)   Publisher:MDPI AG  

    This article examines the establishment and publication of green plans and green public procurement (GPP) policies in Japanese municipalities. The purpose of the study was to investigate these green policymaking initiatives from a contingency theory perspective. The first research question examined contextual factors for green policymaking. The second research question focused on barriers and enablers. For RQ1, through hypothesis testing and a regression analysis (n = 1663), we found that green policymaking differs by organization location, organization size, and organizational green capabilities. More specifically, we identified prefectures where municipalities score relatively higher as well as lower. Second, we found that larger (vs. smaller) municipalities undertake more (vs. less) green policymaking initiatives. Third, we observed that organizations with more (vs. less) green capabilities develop more (vs. less) green initiatives. For RQ2, through a descriptive and cluster analysis, we identified dominant barriers and enablers to establishing a GPP policy. The dominant barriers include a lack of information, lack of staff, and cost concerns, whereas manuals and example forms are important enablers. These findings are highly relevant to understanding and supporting green policymaking in Japanese municipalities.

    DOI: 10.3390/su15097449

  • Promoting energy efficiency in Japanese manufacturing industry through energy audits: Role of information provision, disclosure, target setting, inspection, reward, and organizational structure Reviewed

    Naonari Yajima, Toshi H. Arimura

    Energy Economics   114   106253 - 106253   2022.8

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

    DOI: 10.1016/j.eneco.2022.106253

  • Does Non-monetary Reward Promote Greenhouse Gas Emission Reduction?: An Evidence from Provincial-Level Policy in Japan Reviewed

    Naonari Yajima

    JCER economic journal   79 ( 2 )   24 - 43   2021.8

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

  • Advancement of green public purchasing by category: Do municipality green purchasing policies have any role in japan? Reviewed

    Takuro Miyamoto, Naonari Yajima, Takahiro Tsukahara, Toshi H. Arimura

    Sustainability (Switzerland)   12 ( 21 )   1 - 24   2020.11

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    Publishing type:Research paper (scientific journal)   Publisher:MDPI AG  

    © 2020 by the authors. Licensee MDPI, Basel, Switzerland. The aim of this paper is to identify (1) the categories in which it is easier or more difficult for local municipalities to implement green purchasing and (2) the role and extent of green purchasing policy (GPP) in promoting green purchasing. To characterize the green purchasing potential of different categories, we examine the green purchasing rate, or the ratio of green products/services to total products/services purchased, of 21 categories of items. We employ data from a unique survey conducted by the Japanese Ministry of the Environment, which provides data on green procurement in municipalities. We observe that air conditioners suffer from low green purchasing rates, whereas most municipalities purchase green products in the paper products and stationery categories. We also examine the relationship between green purchasing rates and GPPs to identify the role and extent of GPPs. Our regression analyses reveal that the presence of a GPP is associated with higher implementation and measurement rates of green purchasing. This pattern is particularly evident for the categories in which many municipalities without GPPs purchase green products but, in most cases, do not measure their green purchasing rate.

    DOI: 10.3390/su12218979


  • Impact of the Feed-in-Tariff Exemption on Energy Consumption in Japanese Industrial Plants Reviewed

    Aline Mortha, Naonari Yajima, Toshi H. Arimura

    Japan and the World Economy   101241 - 101241   2024.3

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.japwor.2024.101241

  • Green Public Purchasing by Japanese Municipalities—The Effectiveness and Limitations of Green Purchasing Policies— Reviewed

    MIYAMOTO Takuro, YAJIMA Naonari, ARIMURA Toshi H.

    ENVIRONMENTAL SCIENCE   36 ( 5 )   160 - 172   2023.9

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    Language:Japanese   Publisher:SOCIETY OF ENVIRONMENTAL SCIENCE, JAPAN  

    This paper analyzes the effects and limitations of green purchasing policy (GPP) developed by municipalities, using data from a survey conducted by the Ministry of the Environment. A cross tabulation of GPP and barriers to green purchasing suggests that the GPP mitigates problems caused by lack of staffing and manuals. In addition, the regression analysis reveals that not only declaring the promotion of green purchasing in the environmental policies of a municipality but also formulating its GPP increases the probability that employees will realize the direct effects of green purchasing. However, the estimation results do not suggest that the GPP increases the probability of measuring those effects. From this, we infer that the GPP is not effective in addressing one of the major barriers to promoting green procurement, the difficulty in understanding the effectiveness of green procurement.

    DOI: 10.11353/sesj.36.160

  • A Descriptive Analysis of the Location and Diffusion of Electric Vehicle Charging Stations in Japan

    Naonari Yajima

    81 - 95   2023.7

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  • Analysis of Factors Promoting the Umbrella Sharing Service: Evidence From a Choice Experiment

    KAWAMOTO Mana, YAJIMA Naonari, ARIMURA Toshi H.

    ENVIRONMENTAL SCIENCE   36 ( 3 )   109 - 121   2023.5

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    Language:Japanese   Publisher:SOCIETY OF ENVIRONMENTAL SCIENCE, JAPAN  

    Plastic pollution has been of attention around the world. Among plastic products, plastic umbrellas are difficult to recycle, and consequently, cause harm to marine life. To reduce the consumption of plastic umbrellas, a sharing economy is a promising solution. In Japan, the first umbrella-sharing service started in 2018. This service allows consumers to rent umbrellas and return them to any rental spots for reasonable costs. However, the diffusion of umbrella-sharing service is limited.

    In this study, we conduct a choice experiment through an online survey to examine what elements promote umbrella-sharing service usage. We investigate whether respondents would choose the service, purchase an umbrella, or go home wet when faced with sudden rain. We also investigate the impact of information provision; we randomly provide the information on environmental issues and umbrella-sharing service in advance of the experiment. We collect data from 201 respondents and conduct regression analyses.

    Our main finding is that if a respondent knew about an umbrella-sharing service before the experiment, they are 7% more likely to use the service. Moreover, if a respondent receives information on both environmental issues and umbrella-sharing service, they are 6% more likely to use the service. Finally, their willingness to pay for the service is estimated at around 471 yen.

    DOI: 10.11353/sesj.36.109


    Naonari YAJIMA, Taisuke SADAYUKI

    AIJ Journal of Technology and Design   28 ( 69 )   976 - 981   2022.6

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Architectural Institute of Japan  

    DOI: 10.3130/aijt.28.976

  • Does a Unit-based Pricing Promote the Reducing of Solid Wastes and the Separating of Recyclable Wastes? Reviewed

    Yao MENG, Naonari YAJIMA, Toshi H. Arimura

    Environmental Science   35 ( 3 )   137 - 145   2022

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

    DOI: 10.11353/sesj.35.137

  • 都道府県による温室効果ガス排出削減計画書制度の計量分析—製造業部門の定量評価— Reviewed

    矢島 猶雅, 有村 俊秀

    環境科学会誌   30 ( 2 )   121 - 130   2017

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

    DOI: 10.11353/sesj.30.121

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  • 不動産価格における波及効果

    矢島 猶雅( Role: Sole author ,  海外論文紹介(pp. 36-39))

    日本住宅総合センター  2023.4 

  • カーボンプライシングのフロンティア : カーボンニュートラル社会のための制度と技術

    有村, 俊秀, 杉野, 誠, 鷲津, 明由( Role: Contributor ,  第5章「カーボンプライシング制度下で省エネ対策はどのように進んだか:埼玉県目標設定型排出量取引制度の事例から」)

    日本評論社  2022.3  ( ISBN:9784535540125

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    Total pages:xii, 281p   Language:Japanese

    CiNii Books

  • Carbon pricing in Japan

    Toshi H. Arimura, Shigeru Matsumoto( Role: Contributor ,  Chapter 8, Energy Consumption in Transition: Evidence from Facility-Level Data)

    Springer  2020  ( ISBN:9789811569630

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    Total pages:xiv, 265 p.   Language:English

    CiNii Books