Naoyuki's elder brother, in other words Masao's first son Takayuki ANZAI (the president of the former Showa Engineering Co., Ltd.), married Emiko, who was the second daughter of Hidezaburo SHODA, who was the president of the former Nisshin Seifun Group Inc. (the head office of which is now Nisshin Seifun Group Inc.).
直之の兄、すなわち正夫の長男・安西孝之（元昭和エンジニアリング社長）は元日清製粉（現日清製粉グループ本社）社長・正田英三郎の次女・恵美子と結婚した。