Taketani, Fumii, Nobuyuki Kobayashi, Seiko Shirasaka, and Tetsuya Toma. 2019. “Proposal of Visualising Model of Customer Demands Sufficiency Degree in Designing Private Life Insurance”. Proceedings of the 61st Annual Meeting of the ISSS - 2017 Vienna, Austria 2017 (1). https://journals.isss.org/index.php/proceedings61st/article/view/3233.