Takasaki, Japan

Takasaki City University of Economics is a municipal university in Japan. It is located in Takasaki City, Gunma Prefecture. Wikipedia.

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Fujii H.,Tohoku University | Iwata K.,Takasaki City University of Economics | Kaneko S.,Hiroshima University | Managi S.,Tohoku University
Business Strategy and the Environment | Year: 2013

This study examines the relationship between environmental performance and economic performance in Japanese manufacturing firms. The environmental performance indicators include CO2 emissions and the aggregate toxic risk associated with chemical emissions relative to sales. Return on assets (ROA) is used as an indicator of economic performance. We demonstrate that there is a significant inverted U-shaped relationship between ROA and environmental performance calculated by aggregated toxic risk. We also find that the environmental performance increases ROA through both returns on sales and improved capital turnover. However, we observe a significant positive relationship between financial performance and environmental performance based on CO2 emissions. These findings may provide evidence for the consequences of firms' environmental behavior and sustainable development. © 2012 John Wiley & Sons, Ltd and ERP Environment.

Iwata K.,Takasaki City University of Economics | Ito Y.,Hiroshima University | Managi S.,Tohoku University
International Journal of Disaster Risk Reduction | Year: 2014

An increasing number of studies analyze the relationship between natural disaster damage and income levels, but they do not consider the distinction between public and private disaster mitigation. This paper empirically distinguishes these two types of mitigation using Japanese prefectural panel data from 1975 to 2007. Our results show that public mitigation rather than private mitigation has contributed to mitigating the total damage resulting from natural disasters. Our estimation of cost-benefit ratios for each prefecture confirms that the mitigation efforts of urban prefectures are less effective than those of rural prefectures in focusing on both large and frequent/small disasters. Hence, urban prefectures need to reassess their public mitigation measures. Furthermore, to lessen the damage resulting from extreme catastrophes, policy makers are required to invest in improved mitigation infrastructures when faced with a high probability of disasters. © 2013 Elsevier Ltd.

Iwata K.,Takasaki City University of Economics | Katayama H.,Waseda University | Arimura T.H.,Waseda University
Energy for Sustainable Development | Year: 2015

Using a household survey conducted in a suburb of Tokyo, we examine whether individuals properly perceive the benefits of energy-saving actions. A bivariate regression shows that, on average, individuals overestimate the benefits. The tendency to overestimate is robust to controlling for individual and home characteristics. Our results are contrary to those of Attari et al. (2011), who found that individuals in the U.S. tended to underestimate the benefits of energy-saving activities. The difference in our results suggests that the provision of information about the benefits of energy saving may be an effective policy to address global warming issues in one country but not necessarily in all countries. We also find that the magnitude of overestimation is greatest among young single males, whereas the benefits perceived by older married females are the smallest. This result suggests that the provision of tailored information (i.e., highly personalized and specific information) can be an effective intervention even in Japan. © 2014 International Energy Initiative.

Pongpiachan S.,National Institute of Development Administration | Iijima A.,Takasaki City University of Economics
Environmental Science and Pollution Research | Year: 2016

Estimating the atmospheric concentrations of PM10-bounded selected metals in urban air is crucial for evaluating adverse health impacts. In the current study, a combination of measurements and multivariate statistical tools was used to investigate the influence of anthropogenic activities on variations in the contents of 18 metals (i.e., Al, Sc, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Cd, Sb, Ba, La, Ce and Pb) in ambient air. The concentrations of PM10-bounded metals were measured simultaneously at eight air quality observatory sites during a half-year period at heavily trafficked roads and in urban residential zones in Bangkok, Thailand. Although the daily average concentrations of Al, V, Cr, Mn and Fe were almost equivalent to those of other urban cities around the world, the contents of the majority of the selected metals were much lower than the existing ambient air quality guidelines and standard limit values. The sequence of average values of selected metals followed the order of Al > Fe > Zn > Cu > Pb > Mn > Ba > V > Sb > Ni > As > Cr > Cd > Se > Ce > La > Co > Sc. The probability distribution function (PDF) plots showed sharp symmetrical bell-shaped curves in V and Cr, indicating that crustal emissions are the predominant sources of these two elements in PM10. The comparatively low coefficients of divergence (COD) that were found in the majority of samples highlight that site-specific effects are of minor importance. A principal component analysis (PCA) revealed that 37.74, 13.51 and 11.32 % of the total variances represent crustal emissions, vehicular exhausts and the wear and tear of brakes and tires, respectively. © 2015, Springer-Verlag Berlin Heidelberg.

Adachi T.,Takasaki City University of Economics | Kongo T.,Fukuoka University
Journal of Informetrics | Year: 2015

We provide three axiomatic characterizations of Egghe's g-index, which measures a researcher's scientific output based on the number of papers the researcher has published and the number of citations of each of the researcher's papers. We formulate six new axioms for indexes, namely, tail independence (TA), square monotonicity (SM), the cap condition (CC), strong square monotonicity (SSM), increasing marginal citations (IMC), and increasing marginal citations+ (IMC+). Along with the two well-known axioms T1 and T2 (Woeginger, 2008a), the g-index is characterized by (i) T1, T2, TA, SM, and CC, (ii) T1, T2, TA, SSM, and IMC, and (iii) T1, TA, SM, and IMC+. Two out of three characterizations are obtained by adding axioms to our new characterization of the class of indexes satisfying T1, T2, and TA, which are defined as generalizations of the g-index. Thus, the remaining four axioms in our first and second characterizations-SM, CC, SSM, and IMC-distinguish the original g-index from other related indexes in the class. Furthermore, the independence of our axioms and that of Woeginger's study is shown. © 2015 Elsevier Ltd.

Hisamune S.,Takasaki City University of Economics | Kogi K.,Takasaki City University of Economics
International maritime health | Year: 2015

BACKGROUND: Concerns are growing about the safety and health of seamen exposed to high risks while working on vessels. Their accident rate in 2013 was 9.9 per 1000 workers, 5 times higher than that in industry. In order to mitigate the risks of seamen, we developed the Work Improvement on Board (WIB) programme by applying participatory action-oriented training (PAOT) methods that have proven effective for reducing work-related risks in small enterprises, construction sites, and agriculture.MATERIALS AND METHODS: We analysed which features of the WIB programme would be most effective for facilitating the planning and implementation of practical improvements on vessels. We examined action -oriented tools used, including a WIB action checklist and good examples, and practical improvements proposed by the participants in 1-day or half-day WIB workshops. To study the effectiveness of the WIB programme, we analysed 1121 replies of a questionnaire distributed to 1459 participants of the programme. We compared the types of improvements achieved and the improvement costs in the WIB programme with those in other PAOT programmes. The impact of the WIB programme on promoting primary prevention by seamen and fishermen was discussed.RESULTS: The action checklist listing practical improvements on board and good example photos apparently facilitated the planning and implementation of improvements feasible on board. The participating crews could propose readily applicable improvements of their vessels within short time. In the case of workshops held in 10 harbours between August and October 2014, participants coming from 110 vessels presented 228 improvement proposals which were mostly feasible at low cost. Among the 1121 questionnaire replies from participants of the WIB programme, over 75% evaluated the programme as necessary, practical and easy-to-understand. These positive results led to the adoption of the WIB programme for training fishermen and seamen on commercial vessels by the Fishery Agency and the Ministry of Land, Infrastructure, Transport and Tourism. The Fishery Agency adopted plans to improve the working environment on fishing vessels by training 500 fishermen per year in the WIB programme from 2013 to 2018.CONCLUSIONS: The participatory work improvement programme can work in vessels when it utilises in a flexible manner local good practices and low-cost improvements as guides. The use of action-oriented tools such as a WIB action checklist and good examples seems important. We recommend the wide use of WIB methods in occupational safety and health management systems on board vessels in Japan and other countries.

Three mechanisms are commonly employed to enable households to sell electricity from grid-connected residential solar photovoltaic (PV) systems to utilities or grid companies: feed-in tariffs (FIT), net metering, and net purchase and sale. This study aims to compare these mechanisms with respect to social welfare and to retail electricity rates that include the cost to electric utilities of purchasing residential PV-generated electricity. The study presents a simple microeconomic model that shows, first, that the mechanism that produces the most social welfare is different depending on the amount of reduction in electricity consumption achievable under net metering or net purchase and sale (which are shown to be essentially similar). If the reduction is relatively small, FIT is likely to produce more social welfare than net metering/net purchase and sale; if the reduction is large, the opposite is the case. Second, the model shows that the mechanism that yields the lowest electricity rate is not definite, and differs depending on the homogeneity of households: when households are more homogeneous, the electricity rate under net metering/net purchase and sale is more likely to be higher than that under FIT. © 2012 Elsevier Ltd.

Yamamoto Y.,Takasaki City University of Economics
Energy Policy | Year: 2015

According to diffusion theory, opinion leaders play an important role in the diffusion of new technologies through interpersonal communication with potential adopters. This study investigates the role and utility of opinion leadership in photovoltaic (PV) system diffusion. Specifically, the study proposes, examines, and considers the implications of the hypothesis that there is a positive relationship between willingness to pay (WTP) for a PV system and opinion leadership on PV-system adoption. The investigation employed an internet-based questionnaire to assess the use of interpersonal communication in decision-making on adoption, to identify opinion leaders on adoption, and to characterize their WTP. The response pool consisted of 488 individuals who lived in a detached house, owned a residential PV system, and were responsible for making the decision to adopt the system. The results support the hypothesis. Considering that subsidization preferentially incentivizes households with greater WTP to adopt PV systems, this suggests that subsidization is more effective than purchases of PV power under feed-in tariffs in promoting the diffusion of residential PV systems through interpersonal communication. © 2015 Elsevier Ltd.

Yamamoto Y.,Takasaki City University of Economics
Proceedings of The International Symposium on Multiple-Valued Logic | Year: 2012

This paper discusses the relationship between the Banzhaf index which is known as an index to show a definite effect in the weighted-voting system in the field of gaming theory and the Boolean difference which is important in fault detection of logic circuits. Firstly the paper shows that the swing which is necessary to calculate the Banzhaf index can be obtained by the calculation of the Boolean difference. Secondly the paper considers the meanings of the swing derived from the double Boolean difference. Lastly the paper considers the meanings of the ternary swing that has been defined in the previous paper where an extended Banzhaf index was defined in the voting system allowing the notion, neutral. Then the paper defines a ternary Boolean difference based on these considerations. © 2012 IEEE.

Maruyama N.U.,Takasaki City University of Economics
International Journal of Tourism Research | Year: 2015

Studying 'roots tourism' provides insights regarding various relationships between diasporic people and their ancestral countries. The goal of this study was to classify second-generation Chinese American roots tourists based on the meanings of visiting China and a sense of belonging to China. Through the interpretive analysis of 34 interviewees, five categories emerged. The findings indicated various meanings of visit, although, overall, ties to the ancestral land seemed ceasing. Roots tourism, a temporal, infrequent visit, may not foster strong ties to an ancestral land. Yet, the study also revealed that the ancestral land still signifies as a special destination for diasporic people. © 2015 John Wiley & Sons, Ltd.

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