Gunma

Lying smack dab in the middle of Japan, you could consider this as the "Midwest" of Japan (but is mostly mountainous, not flat). Gunma was originally famous for Japanese horse breeding, later for silk production, and today is famous for various industrial production and nature. Gunma is home to one of Japan's three "Melody Roads" where almost 3 thousand grooves cut into a 175-meter stretch of the road play a song (Memories of Summer) as the wheels go over them at 50 km/h.