noun
Tokaido Main Line
The name of a major JR railway line connecting Tokyo and Kobe, historically the first main trunk line in Japan.
東海道本線は東京から神戸までを結んでいる。
The Tokaido Main Line connects Tokyo and Kobe.
Compound of 東海道 (Tōkaidō, the historical coastal route) + 本線 (main line).