Seiji Iwaki is the secondary antagonist from Initial D Second Stage and Third Stage and henchmen of Kyoichi Sudo.
Seiji drives a Mitsubishi Lancer Evolution IV and adds half-torn stolen stickers from the teams he defeated onto his car's rear spoiler. His car also has a red "Monster" sticker on the hood with the addition of his own Emperor team sticker on the rear window.
Seiji smokes Thunder Fire's Nissan 180SX & Nakazato's Nissan Skyline GT-R (R32) and steals their stickers for his car design. He was then challenged to a race by Keisuke at Akagi, but lost.