Since the beginning of the 21st century, the word “Anshin” has become more and more wildly used. The English meaning of Anshin means peace of mind, freedom from care, relief, and so on. Japanese public transportation operators often set goals for passengers’ comfort according to Anshin definition. However, it remains difficult to estimate such an achievement, understanding relationship between operators’ strategies and passengers’ feelings. This research targets subway passengers by means of an interview. First, the definition of Anshin is explained, then the structure of subway passengers’ Anshin is clarified. Finally, the operators’ measures making passengers feel Anshin is examined by means of picked up advertisements on safety and manner among promotion of Anshin measures by business operators, and verified whether they are connected with Anshin for users. As a result, it became clear that the Anshin of the user in the subway can be shown quantitatively from the degree of Anshin of the individual elements contributing to it. Regarding advertisements, there is no effect of self improvement of Anshin, but it became clear that there is an effect to arouse attention and interest.
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