7 "single released by female professional wrestler Maki Ueda in 1979. Both sides contain techno Kayo tracks based on the cutting-edge arcade game" Space Invaders "at the time. A-side is "Invader Walk," which has a rhythmic thrust with chittering electronic sounds, and B-side is the spacey techno-pop "Aitsu Ha Invader. Both tracks are included in the high-priced P-Vine project techno Kayo compilation. Rare!