RWB (Rauh-Welt Begriff) is a Porsche tuner manufacture base in Japan founded by Akira Nakai. Starting off as a small countryside body-shop in Chiba-Ken, he created his first car, the Stella 930, the unique 930 tuned by RWB. RWB's Porsche combine Japanese and Euro tuning elements, creating the distinct RWB style for Porsche chassis.