初潮は13歳の時でした。
Sentence Analyzer
English Translation
        I had my first period when I was 13 years old.
    
Furigana
Romanji
        Shochō wa 13 sai no toki deshita.
    
Words
            
                初潮
            
            
                (しょちょう)
            
        
        
            first menstruation
        
    
            
                は
            
            
                (は)
            
        
        
            topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
        
    
            
                歳
            
            
                (さい)
            
        
        
            -years-old; ability; gift; talent; aptitude; genius
        
    
            
                の
            
            
                (の)
            
        
        
            indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question
        
    
            
                時
            
            
                (とき)
            
        
        
            time; hour; moment; occasion; case; chance; opportunity; season; the times; the age; the day; tense
        
    
            
                デス
            
            
                (デス)
            
        
        
            death