Inoue has cultivated a larger-than-life figure due to his perpetual wearing of sunglasses, a somewhat eccentric personality (something that he shares with Tamaki), and a taller-than-average height in Japan (178 cm) for that time.
In 1984, he composed and wrote this haunting, atmospheric ballad called "Isso Serenade"(Preferably a Serenade) which was released in October, peaking at No. 4. It also appears on the album "9.5 Carat" which was released a couple of months later. "Isso Serenade" is the only original song on the album which reached No. 1 on the Oricon weeklies. The rest of the album are covers of other artists' hit songs such as the aforementioned "Wine-Red no Kokoro" and Akina Nakamori's"Kazari Janai no yo Namida wa"（飾りじゃないのよ涙は）, both of which were written by Inoue.