The Nippori-Toneri Liner is an automated guideway transit (AGT) system between Nippori Station in Arakawa and Minumadai-shinsuikouen Station in Adachi, Tokyo. The line opened on March 30, 2008. The operator is expecting 51,000 passengers per day. It is operated by the Tokyo Metropolitan Bureau of Transportation.
The western part of Adachi is poorly served by public transport and planning of the line started in 1985, with the initial intention of constructing a full-fledged subway. However, this was scrapped due to the high cost and projected low ridership, and a more cost-efficient AGT system was selected instead. Construction of the line started in 1997, and service commenced on March 30, 2008. The main contractor was the Tokyo Metropolitan Subway Construction Company, which also built the Toei Ooedo Line.
The fully elevated, double-tracked line is 9.7 km long with 13 stations, and it offers interchange to the Yamanote Line at both Nippori and Nishi-Nippori Stations. A journey from end to end takes 20 minutes, compared to as long as 60 minutes by bus during rush hour.