Researchers

NAGASHIMA Fumiya

NAGASHIMA Fumiya: Associate Professor

Faculty	Department of Economics / Graduate School of Economics
Researchmap	https://researchmap.jp/fumiya-nagashima

Research Activities

Research Areas

Humanities & social sciences, Economic statistics
Environmental science/Agricultural science, Environmental policy and society

Research Interests

産業連関分析, 産業エコロジー, ライフサイクルアセスメント

Published Papers

Grain energy intensity and food security in Africa
Fumiya Nagashima; Tetsuji Tanaka
Energy Reports 15 , 109103-, Jun. 2026 , Refereed
Emission Transfers of Toxic Chemical Pollutants among NAFTA Countries: A Structural Change Approach
Shigemi Kagawa; Shohei Tokito; Hidemichi Fujii; Shunsuke Okamoto; Fumiya Nagashima
Structural Change and Economic Dynamics 77 , 327-344, Jan. 2026 , Refereed
Estimating the embodied carbon emissions and economic impacts of the EU carbon border adjustment mechanism and China's retaliatory measures
Tetsuji Tanaka; Fumiya Nagashima
Journal of Environmental Management 390 , 126209-, Aug. 2025 , Refereed

嫌いにならない法学入門 , 村中, 洋介; 川島, 翔; 奥, 忠憲; 前田, 太朗; 竹村, 壮太郎; 色川, 豪一; 山科, 麻衣; 宮下, 摩維子; 岡﨑, 頌平; 若生, 直志; 金﨑, 剛志; 釼持, 麻衣; 永島, 史弥 , 信山社 , Mar. 2025
CO2排出量の算出と削減事例 , 永島史弥; 時任翔平; 土中哲秀 , 第2章5節グローバルサプライチェーンネットワークのCO2排出量推定 , 第2章5節グローバルサプライチェーンネットワークのCO2排出量推定 , 技術情報協会 , Sep. 2023
嫌いにならない法学入門〔第2版〕 , 村中洋介; 川島翔; 奥忠憲; 前田太朗; 竹村壮太郎; 色川豪一; 山科麻衣; 宮下摩維子; 岡﨑頌平; 若生直志; 金﨑剛志; 釼持麻衣; 永島史弥 , 信山社 , 25, Mar. 2023

Conference Activities & Talks

Changes in Value-Added Distribution Structure and Greenhouse Gas Emissions Structure Accompanying the Digitalization of Japan's Automobile Industry ―A Time-Series Analysis Using the OECD-ICIO Table― , 上北裕翔; 永島史弥 , 第21回日本LCA学会研究発表会 , 4, Mar. 2026
Structural Analysis of GVC Participation and Labor Market Inequality in India , 高橋知眞; 時任翔平; 永島史弥 , 第36回環太平洋産業連関分析学会 , 25, Oct. 2025
Excessive Working Hours and Mental Health in Supply Chains: Evidence from Expo 2025 Osaka-Kansai, Japan , Tomoaki Nakaishi; Fumiya Nagashima; Gosuke Yamaguchi , The 2025 Green Innovation & Engineering International Conference , 23, Sep. 2025

Modern Agricultural Inputs and Trade Structures Shape the Energy Intensity of Grain Consumption Across High And Low Income Countries , Tetsuji Tanaka; Fumiya Nagashima , 16, Mar. 2026
Summary:Abstract <p>Despite extensive research on the food–energy nexus, a critical gap remains in understanding the energy intensity of grain consumption across income levels, particularly in differentiating between domestically produced and imported grains. This vulnerability is a central concern for global food security, yet the structural determinants of energy intensity remain insufficiently explored. Existing studies primarily examine production-level agricultural energy use, often overlooking the role of international trade and variations in energy efficiency. This study addresses these gaps by employing an input–output model to estimate the energy intensity of grain consumption in 30 high-income and 30 low-income countries. Energy use is categorized into six components: domestic direct energy, domestic transport, domestic indirect energy, import direct energy, import transport, and import indirect energy. The findings reveal significant cross-country differences in energy intensity. High-income countries exhibit an average energy intensity of 1.27 TJ per 1,000 tons of grain, while low-income countries average 0.64 TJ per 1,000 tons. Transport energy intensity constitutes 3.60% of total energy use in high-income countries, reflecting efficient logistics, whereas in low-income countries, it accounts for 10.90%, highlighting infrastructural inefficiencies. Statistical diagnostics and sensitivity analysis (± 30% transport intensity) confirm the robustness of these results. Principal component analysis suggests modern agricultural inputs drive higher energy intensity in high-income countries, whereas capital investment in low-income countries enhances efficiency. The results indicate that enhancing grain self-sufficiency acts as a critical structural buffer against global energy shocks, providing a resilient foundation for regional food systems.</p>
The Environmental Kuznets Curve Reconsidered: Assessing Direct and Indirect Energy Use in Global Grain Supply Chains , Tetsuji Tanaka; Fumiya Nagashima; Murat Guven; Pengfei Luo; Bülent Güloğlu; Fuat Erdal , Aug. 2025
Energy Intensity of Grain for Food Security in Africa: An Input-Output Analysis , Tetsuji Tanaka; Fumiya Nagashima , Jul. 2025