Complex sentence: In Japan, street racing sometimes occurs on long straights in industrial areas, which are used for drag races, known natively as 0-400 (meters) or "Zero"- "Yon" (ゼロヨン).
Split into simpler sentences: In Japan, street racing sometimes occurs on long straights in industrial areas, which are used for drag races. These are known natively as 0-400 (meters) or "Zero"- "Yon" (ゼロヨン).