東とう海かい道どう線せんMeaningsNoun1. Tōkaidō LineKanji used東east海sea道roadway線lineComposed of東とう海かい道どうTōkaidō (Edo-period Edo-Kyoto highway); Tōkaidō (under the ritsuryō system; one of the seven districts of ancient Japan)Noun線せんline; stripe; stria; line (e.g. telephone line); wire; ray (e.g. X-ray); beam; line (e.g. of a railroad); track; route; …Noun