We evaluated the suppressing effect of weak-acidic polyester on itching during sleep when wearing a sleep garment made of weak-acidic polyester for the patients with atopic dermatitis. The weak-acidic polyester knitted fabric was prepared from commercial weak-acidic polyester, and applied for a sleep garment. The degree of itching during sleep was evaluated by VAS, and it was confirmed that the degree of itching was lower in patients with atopic dermatitis when wearing a sleep garment made of weak- acidic polyester than when wearing that made of untreated polyester. When the patients with atopic dermatitis work up a sweat during sleep, the sweat contains histamine as an itching component so that they feel itchy while sleeping. The weak-acidic polyester has an antibacterial effect against Staphylococcus aureus by maintaining the skin pH around 5.5, and it is considered that itching could be inhibited by suppressing the growth of Staphylococcus aureus.

This study discusses the results of a literature survey and cross-tabulation analysis of the objects of kawaii emotions and causes of kawaii emotions. From ancient language dictionaries, historically, kawaii could be said to be mainly used to refer to one’s relatives and gradually to non-relative children, romantic partners, and artificial objects. Based on the descriptions from various ancient language dictionaries, this study presents four causes of kawaii emotions: the morphology of the object, its behaviors and facial expressions, relationship between human and it, and its perceived personality. The primary causes of kawaii emotions toward relatives and romantic partners are the relationship with the object and its personality, and the causes toward non-relative children are the morphology of the object, its behavior and facial expressions, and its personality, and the causes toward artificial objects are the morphology of the object, its behavior and facial expressions, and the relationship.