Tadaki Nishiyama (Japanese: 西山 忠来; 9 February 1950 – 24 November 2023), better known under the pen names Shizuka Ijūin (Japanese: 伊集院静) and Ayumi Date (Japanese: 伊達 歩), was a Japanese writer and lyricist.
Source: “Shizuka Ijūin”, English Wikipedia (CC BY-SA 4.0), excerpt