東急6000系・大井町線を中心に掲載しています。
Oimachi Line starts from Oimachi Line in Keihin-tohoku Line, crosses most lines of Tokyu (Ikegami, Meguro and Toyoko) and reaches Furako-tamagawa (known as 'Nikotama' in slang) in Dennentoshi-line. Long time, only all the services are local, but recently express (rapid) service has started. Series 6000 is dedicated to this express.