Question:  Marine Day was established by what law?
Sentence (from "Public holidays in Japan"): Public holidays in Japan (国民の祝日 , kokumin no shukujitsu ) were established by the Public Holiday Law (国民の祝日に関する法律 , Kokumin no Shukujitsu ni Kansuru Hōritsu ) of 1948 (as amended).
Relevant evidence: Yes