About YAMADA ISAO
About 日本石鹸洗剤工業会
About 繊維製品消費科学
About Laundering
About consumer behavior
About washing machine
About detergent
About softening agent
About survey on actual situation
About dryer
About home laundering
About washing and drying machine
About Related industries
About Household electric appliances
About Detergents and soap in general
About 家庭洗濯
About 状況
About 消費者意識
About 洗濯
About 実態調査