RAUH-Welt BEGRIFF is a Porsche tuner located in Japan. RWB has combined Japanese and Euro tuning elements, creating the distinct RWB style for Porsche chassis. Starting off as a small countryside body-shop in Chiba-Ken, RAUH-Welt 911’s are now a common sight on both the streets and racing circuits of Japan. We create only one RWB Porsche for each customer. Nakai (the designer and business owner / personality) builds ALL RWB cars around the world. He travels the world to meet with customers and creates their personal Porsche.