Seikichi (成吉 Seikichi): Seikichi is a young man who resembles Seigi Ozaki, who is vying for the hand of Oyuki, much like his present counterpart. Saraba Kamen Rider Den-O: Final Countdown Seikichi was portrayed by Akira Nagata (永田 彬 Nagata Akira) of RUN&GUN, who also played Seigi.