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TAKAHASHI YOSHIFUMI Last modified date:2024.05.17

Associate Professor / Department of Agricultural and Resource Economics, Graduate School of Bioresource and Bioenvironmental Sciences
Department of Agricultural and Resource Economics
Faculty of Agriculture

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Academic Degree
Doctor of Philosophy in Agriculture
Country of degree conferring institution (Overseas)
Field of Specialization
Environmental Economics, Agricultural Economics and Fisheries Economics
ORCID(Open Researcher and Contributor ID)
Total Priod of education and research career in the foreign country
Outline Activities
I have researched economic valuation and optimum usage of non market goods, agricultural land and aquaculture farm depend on nature.
Current researches I am working are as follows;

-To evaluate an environmental load reduction in the reusing system of organic waste treatments
-To research what factors affect to Eco-friendly behavior on the basis of behavioral economics
-To analyze the ripple effects by introduction of new technology on aquaculture industries

Our laboratory including me, has much knowledge about evaluation methodology such as Conjoint analysis, CVM, Life cycle analysis, AHP and so on.
Please join our laboratory!
Research Interests
  • Survey on Consumer Acceptance of Genome-Edited Foods and Insect Feed for Marine products.
    keyword : Genome-Edited Foods, insect feed, social (public) acceptance
  • A study on New Demand Supply System of Liquid Fertilizer Considering the Complementary Relationship between Rural Areas and Fishing Grounds
    keyword : Consensus, Decision Making, New Demand Supply System, Recycling Society
  • An evaluation of environmental load reduction in the reusing system of organic waste treatments
    keyword : Clean Development Mechanism, Life Cycle Analysis, Contingent Valuation Method, Conjoint Analysis, Organic waste treatment, recycling system
  • An analyze the ripple effects by introduction of new technology on aquaculture industries in Tohoku area.
    keyword : Fuzzy linear programming, Fuzzy analytic hierarchy process, Time series analysis, Consumer behavior, Cost benefit analysis, Spillover effect
  • A study on behavioral economics for information of environmental status which prompt moral behavior.
    keyword : Prospect theory, Framing effect, Behavioral economics, Information analysis
Current and Past Project
  • Our research is to analyze how to allocate information to prompt moral behavior, using prospect theory based on behavior economics. And then we suggest effective information service for environmental conservation.
  • Our research is to suggest sustainable management model of silver salmon not to be affected by imported salmon from Chile.
  • Our research is to evaluate a new fishery products developed by new technology, and then suggest marketing strategy and management model
Academic Activities
1. Gan Lin, Yoshifumi Takahashi, Hisako Nomura, Mitsuyasu Yabe, Policy Incentives, Ownership Effects, and Firm productivity; Evidence from China's Agricultural Leading Firms Program, Economic Analysis and Policy,, 73, 845-859, 2022.03.
2. Le Thi Thu Huong, Yoshifumi Takahashi, Hisako Nomura, Luu Van Duy, Cao Truong Son and Mitsuyasu Yabe, Water-use efficiency of alternative pig farming systems in Vietnam, Resources, Conservation and Recycling,, 161, 1-10, 2020.10, Livestock production in tropical countries consumes significant amounts of water for cooling and washing facilities and releases large amounts of wastewater to the environment, resulting in water scarcity and pollution. However, improving water-use efficiency (WUE) at the livestock farm level has received little attention in current research. This study measures the WUE of pig farms in Vietnam, a tropical Southeast Asian country. There, livestock production consists of three farming systems: industrial farms (IFs), semi-industrial farms (SIFs), and traditional farms (TFs). This study compares the WUE of these farming systems, suggests which of the systems is most sustainable, and proposes solutions to improve the WUE of each system. The results of surveying 247 pig farms and applying data envelopment analysis show that the free use of groundwater resources causes a low average WUE of 52%. IFs (closed pigpens) have the highest WUE, followed by TFs and SIFs (open pigpens). This finding confirms the sustainability of IFs over other types of farming. Furthermore, using Tobit models, we analyze the determinants of the WUE within each farming system. The results show that shortening the fattening phase and decreasing the floor space allowance per pig increase the WUE of TFs and SIFs. In addition, decreasing the depth of the puddles in pigpens and the frequency with which these puddles are drained improve the WUE of IFs. These results suggest a need to revise the design of pigpens in order to reduce water use related to washing and cooling..
3. Le Thi Thu Huong, Yoshifumi Takahashi, Hisako Nomura, Cao Truong Son, Takeru Kusudo, Mitsuyasu Yabe, Manure management and pollution levels of contract and non-contract livestock farming in Vietnam, Science of The Total Environment,, 710, 1-11, 2020.03, In analyzing contract farming of livestock production, many studies have focused on the economic aspect. This paper offers the environmental issue by investigating manure management and pollution levels of contract farming (CF) and non-contract farming (NCF) livestock producers in Vietnam. By surveying 270 pig farms and applying logit model, we found that commercial pigpen type of CF reduces the probability of manure separation, while larger garden area and knowledge of composting increase it. By analyzing the wastewater samples collected from 59 farms and employing nearest neighbor matching technique, this paper indicated that CF reduces the pollutants' concentrations in effluents. Using OLS regression models, we found out that manure separation contributes to a reduction in nutrient matters, while biogas plant or combination of biogas plant and stabilization ponds helps to diminish organic matters. The study results suggest that the government should regulate the minimum required land area for installation of the combined manure treatment plants (MTPs). Additionally, to recycle manure and improve nutrient matters in effluent, advanced technologies for separating solid manure are extremely necessary for CF producers. Furthermore, we recommend the government to build mechanisms to compel agribusiness firms engaging in their liability for the environmental side effects caused by their CF producers..
4. Le Thi Thanh Loan, Yoshifumi Takahashi, Hisako Nomura and Mitsuyasu Yabe, Modeling home composting behavior toward sustainable municipal organic waste management at the source in developing countries, Resources, Conservation and Recycling, 140, 65-71, 2019.02, Home composting (HC) has become an increasingly important consideration in the framework of sustainable municipal organic waste (MOW) management in developing countries. We develop, for the first time, two HC behavior models, which include households’ decisions to participate in a HC scheme and the level of HC participation. By applying Logit and Ordered logit models, a survey of 202 respondents in rural areas of Hoi An, Vietnam, indicates that households’ decisions to get involved in a HC scheme and the level of HC participation are affected by motivational factors such as knowledge about HC, attitude toward it, and owning a garden. We then explore the differences between the influencing factors for the two models. Interestingly, while participation in the HC training program influence the decision to participate in the HC scheme, the factor appears unimportant in increasing the level of HC practice. In addition, once the HC participation decision has been made, we find that pro-environmental behavior (such as habit of reusing plastic bags and reducing wastefulness) could promote a higher level of HC practice. These findings could help policy makers in promoting HC behavior to enhance a sustainable MOW management strategy at the household level..
5. Le Thi Thanh Loan, Hisako Nomura, Yoshifumi Takahashi, Mitsuyasu Yabe, Psychological driving forces behind households’ behaviors toward municipal organic waste separation at source in Vietnam
a structural equation modeling approach, Journal of Material Cycles and Waste Management, 10.1007/s10163-017-0587-3, 19, 3, 1052-1060, 2017.02, Most recent municipal organic waste-separation at source (MOW-SAS) programs that have been introduced in developing countries remain pilot programs, but have not fully developed into sustainable municipal solid-waste management strategies. The city of Hoi An, Vietnam, implemented a mandatory MOW-SAS program in 2012. Using Structural Equation Modeling, this study investigates the psychological driving forces behind households’ behaviors toward the MOW-SAS program. This study finds that moral norm (moral perception of what is good or bad), attitude toward sorted waste, and situational factors (issues concerning physically sorting garbage, such as time, space, and lack of family cooperation) can significantly affect household behaviors toward MOW-SAS. It confirms the need for supplying frequent environmental educational campaigns and highlighting the benefits of MOW-SAS programs. Moreover, the study finds that households’ system trust in local authority concerning the MOW-SAS program is an important driving force behind the behavior. Therefore, recommendation is also made on the need to develop strong leadership in local authorities through improving: (1) reliability (ability to effectively treat sorted waste), (2) legitimacy (punitive measures for non-participants), and (3) effectiveness (dissemination of information about the benefits of MOW-SAS programs) for promoting MOW-SAS..
1. Yoshifumi TAKAHASHI, Mitasu YAMAMOTO, An Adaptation of Construal Level Theory to Questionnaire Survey, The 10th International Symposium on East-Asian Agricultural Economics 2019, 2019.11.
Membership in Academic Society
  • Japan Society for Distributive Science
  • The Farm Management Society of Japan
  • Association for Rural Planning
  • The Food, Agricultural and Resource Economics Society of JAPAN
  • Japan-France Oceanographic Society
  • Society of Environmental Economics and Policy Studies
  • Japanese Society of Regional and Agricultural Development
  • The Agricultural Economics Society of Japan
  • The World Oyster Society
  • We endeavor to clarify the behavior around consumers’ choice for bio-concentrated liquid fertilizer (hereinafter: Bio-CLF), which comes from methane fermentation of digested sludge and promotes the effective use of organic waste such as food residue, sake brewing waste liquid, and waste milk when compared to conventional liquid fertilizer.
    We conducted a questionnaire survey of consumers and analyzed the results using a latent class model. This resulted in the 564 consumers being divided into three segments: (1) Innovative technology low evaluation group (40.5%), (2) Bio-CLF accepting group (31.6%), and (3) Organic oriented group (27.9%). The evaluation of Bio-CLF raw materials from group 1 was negative, but positive from group 2. Additionally, in the case of the raw materials that come from consumers’ living areas, about 60% of consumers showed a positive evaluation.
    As a future Bio-CLF product sales strategy, we suggest (1) promoting Bio-CLF agricultural products in a way that avoids generating negative images, such as residues, among consumers, and (2) obtaining JAS organic certification for the Bio-CLF technology.
  • China’s “Agricultural Leading Enterprise Program” (ALEP) could promote the total factor productivity at micro level. Actually, there are many disputes about selective industrial policies at present. Using China Industrial Enterprise Database, this study selects the ALEP as an economic experiment to research whether selective industrial policy is effective. The conclusion is positive after using Propensity Score Matching-Differences in Differences (PSM-DID) to control endogeneity problem. Specifically, the ALEP’s average promotion effect is 4.66%, and the policy could remain effective in the long run. This study further finds that state-owned enterprises could obtain better policy effects compared with non-state-owned enterprises. The ALEP achieves results in tax incentives but could not reduce the financing constraints faced by enterprises, which means there is still a lot of room for the government to execute the program’s financial assistance.
  • Unit non-response has been recognized as a potential problem because it may cause the bias in the inference of important parameters. In this research, we investigate the non-response bias in Contingent Valuation (CV) by using Inverse Probability Weighting (IPW). In the application of IPW, however, one of the major problem is the inaccessibility to auxiliary variables. We could deal with this inaccessibility problem when we use internet-based research because it is available that the individual information registered to the internet research company as auxiliary variables. We apply IPW to evaluate consumers' willingness to pay for a grass-fed beef stake
    produced by environmentally friendly farming system.
    The result in the logistic regression of the response propensity shows that response propensity have the relation to personal income, age, characteristics of family member, use of SNS or video distribution websites, and hobbies. On the other hand, there is almost no difference between the respondents’ mean of WTP and population mean of WTP estimated by IPW. From this survey, there is no evidence that these differences in auxiliary variables between respondents and non-
    respondent cause non-respondent bias in the estimation of consumers’ WTP for a grass-fed beef.
Educational Activities
My educational activities consist of three parts such as seminars, instructing thesis and teaching classes. Teaching class I have are Econometrics, Resource Economics, Advanced Econometrics for agriculture.
Other Educational Activities
  • 2024.04.
  • 2023.04.
  • 2022.04.
  • 2019.04.
  • 2018.04.