Analysis of dietary content composition is increasingly being conducted in the social sciences as well as in nutrition, but not yet in the analysis of day-to-day decision-making processes. In this study, a conceptual model of the decision-making process of dietary content composition was constructed based on the conceptual model of the decision-making process in consumer behavior theory, the role of institutions （habits, routines） in the action by Hodgson and Bourdieu’s idea of lifestyle as a normative system called habitus. The actual decision-making process was then ascertained through a questionnaire survey and semi-structured interviews incorporating the laddering method, for 15 women; 20s~30s, single, with a job, 30s with husband and children aged 3 to primary school, and 60s, a couple. The results showed that when family members were present, the norm of a family-oriented lifestyle was at work, forming a dietary norm of preparing a structured, elaborate meal with dinner as a central part of the meal. Singles, on the other hand, were divided between simple or absent meals and elaborate meals. In addition, a type had been formed for each diet, which was used as a routine, with limited decision-making taking into account the situation at the time. The above provided some validation of the conceptual model.

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2024 日本フードシステム学会

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China has experienced a significant surge in beef demand in recent years, with Inner Mongolia emerging as a primary supplier. Among various food safety concerns, Chinese consumers have notably prioritized beef safety. This study employed conjoint analysis to assess consumer preferences regarding beef from Inner Mongolian and Beijing, aiming to establish safety criteria. Through an online survey of 400 respondents, the study unveiled comparable perceptions among Inner Mongolian and Beijing consumers who prefer Inner Mongolian beef. Moreover, the research highlights that many consumers determine beef safety based on certification and traceability, indicating a willingness to pay a premium for these attributes.

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This study investigates Shanghai consumer’s preferences regarding Chinese beef using best-worst scaling and latent class analysis. The results emphasize the importance they attribute to freshness and identify four categories that influence their choice: preference for “fresh,” “for fresh and organic,” “for multiple qualities such as fresh, organic and Chinese beef,” and “preference for brand and beef breed.” Given that a desire for freshness is a commonality, ensuring this quality in future beef production is essential. This finding also serves as a pointer for an effective marketing strategy for those seeking to expand consumption and demand for Chinese beef.

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Monitoring the dynamics of trade volume in response to physical transformations in wholesale markets is crucial for ensuring a reliable food supply, given their significant role in the distribution network. This study investigates the effects of shifting to the Tokyo Metropolitan Central Wholesale Market (Toyosu Market) from Tsukiji Market in 2018 on seafood product volumes. Employing an autoregressive integrated moving average (ARIMA) model, we analyze daily wholesale trade volume data for 57 seafood items. The findings indicate that relocation did not have a noticeable impact for most products. Thus, the Toyosu Market supported a stable seafood supply chain despite the physical shock.

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This study aims to elucidate the benefits received by stakeholders, including consumers, direct sales offices, and producers, from providing wholesale food services by local agricultural direct sellers. Moreover, it explores the factors supporting business transactions. For this purpose, a case study of a local direct sales office that has established a broad distribution network in the Tokyo metropolitan area was conducted from the perspectives of price competitiveness, product differentiation, and stable supply systems. Subsequently, the study outlined the requirements for continuing efforts based on these factors.

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