Above-mentioned Hiromu NONAKA and Koichi TSUKAMOTO (Representative director of Wacoal Corporation), who was a business leader in Kyoto and the chairman of the Kyoto Chamber of Commerce and Industry, wrote in their books and writings that Ninagawa was an attractive person even if they conflicted with each other in a political point of view.
前述の野中広務、京都財界のリーダー格であった京都商工会議所会頭塚本幸一（株式会社ワコール代表取締役）等、政治的には対立しながらも魅力的な人物であったと著書等で記している。