a first, start, a beginning / (slang) first sexual relations, one's first time

Japan

Yokohama (the capital city of Kanagawa Prefecture, Japan) / a surname

本論: body (of a discourse)

railway

発動:

(intransitive) to collect; to gather; to assemble

a traffic route, a train line / a course which companies or groups have for a purpose

putting a machine into operation / putting into action

to put a machine into operation / to put into effect