初潮 しょちょう Meanings Noun menarche; first menstruation Kanji 初 first. Read as ショ. 潮 tide. Read as チョウ. Example sentences 初潮は13歳の時でした。I had my first period when I was 13 years old. 初潮は13歳のときでした。I had my first period when I was 13 years old. Common phrases 初潮を迎える Word lists Physiology Jinuma: Japanese Dictionary · Word lists