JR-Central put starting station of Linear's at Tokyo side to Shinagawa Station.
This is due to a geological survey and good connection to Hanada airport.

According to Nikkei news paper,JR-C already announced to JR-East and Tokyo Metropolitan Gov. to this idea.
At Shinagawa Sta.,they construct 1km long structure in basement(dozen of maters under the ground).
Consider smooth connection between Linear and Shinakansen, in case of Liner's operation suspended.

At early stage,JR-C also consider Tokyo Sta. as starting station,
however Tokyo station already crowred with structure even if basement.

Linear will be in operation in 2027.