RWB/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.