The urban rail transit system in Kantō (関東) with seven principal areas: Tōkyō (東京), Tama (多摩), Yokohama (横浜), Kawasaki (川崎), Saitama (さいたま), Chiba (千葉), & Sagamihara (相模原) is mainly operated by multiple companies. There are currently about 155 urban rail lines transit through Kantō.