It was originally known as the Mitsubishi Airtrek when it was introduced in Japan in 2001 , and was based on the Mitsubishi ASX concept vehicle exhibited at the 2001 North American International Auto Show .
When it was first introduced in Japan in 2001 , the vehicle was known as the Mitsubishi Airtrek and it was based on the Mitsubishi ASX concept vehicle that was exhibited at the 2001 North American International Auto Show .