Akira Nakai (Japanese: 中井 啓, Hepburn: Nakai Akira) is a Japanese automotive tuner, founder of Porsche aftermarket tuning company RAUH-Welt BEGRIFF (RWB), who specializes in the design and installation of custom wide-body kits for classic and modern Porsche models.[1][2] Earlier examples sported a sticker German: "Sekund Entwicklung" on the back which was later changed to German: "Zweite Entwicklung", lit. '"second development"' to fix a German language mistake.[3]