The objective of this paper is to establish a theoretical foundation for food education in schools. Amartya Sen’s capability approach (CA), an ethical theory concerning the freedom required to achieve one’s well-being, was applied to define the previously unchallenged ethical nature of food education. The analyses were informed by foundational CA concepts, Sen’s own perspectives on ‘food’ and ‘education’, and CA-based education studies. Through these analyses, the fundamental nature of food education was defined as follows: ‘Capability to eat well’ is (...) the freedom to convert commodities (such as food or pocket money) into the ‘functionings to eat well’ that constitute children’s ‘well-eating’ (Definition 1); and the objective of food education as public policy is to expand such capability to eat well (Def. 2). However, if an appropriate pedagogy is not employed, children’s capability can be reduced (Def. 3); therefore, to avoid this, the pedagogy has to enable them to perceive more ‘associations’ (in a Deweyan sense) between related conversion factors (Def. 4), as well as to choose and participate in the educational process (Def. 5). This theory not only elucidated the ethical nature of food education but also expanded the scope of the application of the CA to food issues. (shrink)

The objective of this article is to gain an in-depth understanding of the eating lives of low-income single mothers in Japan. Semi-structured interviews were conducted with nine low-income single mothers living in the three largest urban areas (Tokyo, Hanshin [Osaka and Kobe] and Nagoya) in Japan. Framed by the capability approach and sociology of food, their dietary norms and practices, as well as underlying factors that impact the norm-practice gap were analysed across nine dimensions: meal frequency, place of eating, meal (...) timing, duration, persons to eat with, procurement method, food quality, meal content and pleasure of eating. These mothers were deprived of various types of capabilities, extending not only from the quantity and nutritional aspects of food, but also to spatial, temporal, qualitative and affective aspects. Aside from financial constraints, eight other factors (time, maternal health, parenting difficulties, children’s tastes, gendered norms, cooking abilities, food aid and local food environment) were identified as influencing their capabilities to eat well. The findings challenge the view that food poverty is the deprivation of economic resources required to ensure a sufficient amount of food. Social interventions that go beyond monetary aid and food provision need to be proposed. (shrink)

Amartya Sen’s work has contributed to shifting our focus from food availability to food access and utilisation, together called ‘nutritional capability’. Existing food insecurity instruments have been informed partially by the capability approach, but remain focused on material deprivation and its economic sub-dimensions. This narrow focus has become problematic, particularly in high-income countries, where material deprivation is largely overcome and food poverty manifests itself differently from that in low-income countries. Food poverty in high-income countries should thus be approached from a (...) ‘food capability’ perspective that fully recognises the multidimensionality of eating lives and the multiple factors that affect their dietary standards. To demonstrate the usefulness of this perspective, the Alkire-Foster method for multidimensional food poverty was utilised to analyse food poverty in Japan. The Alkire-Foster measure has a dual cut-off approach and its adapted method can produce a multidimensional food poverty index by setting reasonable food deprivation and poverty thresholds. The national data used for empirical demonstration was obtained from a web-based questionnaire conducted in Japan, to which 973 participants (aged 20–60 years) responded. The measurement identified a 20.6% food-poor population and inequalities in food capabilities among subgroups. Although economic deprivation was tightly linked to food poverty, the results suggested that gender- and age-based inequalities were larger than socioeconomic status-based ones, which reflected much wider societal problems in Japan than growing economic poverty, such as gender inequality and population ageing. The proposed measurement is effective for monitoring food policy impacts and complementing existing food insecurity assessment tools. The results will be useful for promoting social debate about what the minimal dietary standard should be in high-income societies. (shrink)

Sleep is a fundamental property conserved across species. The homeostatic induction of sleep indicates the presence of a mechanism that is progressively activated by the awake state and that induces sleep. Several lines of evidence support that such function, namely, sleep need, lies in the neuronal assemblies rather than specific brain regions and circuits. However, the molecular mechanism underlying the dynamics of sleep need is still unclear. This review aims to summarize recent studies mainly in rodents indicating that protein phosphorylation, (...) especially at the synapses, could be the molecular entity associated with sleep need. Genetic studies in rodents have identified a set of kinases that promote sleep. The activity of sleep-promoting kinases appears to be elevated during the awake phase and in sleep deprivation. Furthermore, the proteomic analysis demonstrated that the phosphorylation status of synaptic protein is controlled by the sleep-wake cycle. Therefore, a plausible scenario may be that the awake-dependent activation of kinases modifies the phosphorylation status of synaptic proteins to promote sleep. We also discuss the possible importance of multisite phosphorylation on macromolecular protein complexes to achieve the slow dynamics and physiological functions of sleep in mammals. (shrink)

Although we are beginning to understand the neuronal and biochemical nature of sleep regulation, questions remain about how sleep is homeostatically regulated. Beyond its importance in basic physiology, understanding sleep may also shed light on psychiatric and neurodevelopmental disorders. Recent genetic studies in mammals revealed several non-secretory proteins that determine sleep duration. Interestingly, genes identified in these studies are closely related to psychiatric and neurodevelopmental disorders, suggesting that the sleep-wake cycle shares some common mechanisms with these disorders. Here we review (...) recent sleep studies, including reverse and forward genetic studies, from the perspectives of sleep duration and homeostasis. We then introduce a recent hypothesis for mammalian sleep in which the fast and slow Ca2+-dependent hyperpolarization pathways are pivotal in generating the SWS firing pattern and regulating sleep homeostasis, respectively. Finally, we propose that these intracellular pathways are potential therapeutic targets for achieving depolarization/hyperpolarization balance in psychiatric and neurodevelopmental disorders. How animals implement sleep homeostasis is a great mystery. Here, we review recent studies with highlighting the hypothesis that the slow Ca2+-dependent hyperpolarization pathway regulates sleep homeostasis via modifying the fast pathway; the activity of CaMKIIα/β increases during wakefulness, which triggers sleep by phosphorylating the components in the fast pathway. (shrink)