User blog comment:Mikuru Kanzaki/Learn Japanese from other users!/@comment-5707992-20160531231014/@comment-28334981-20160602132715

How do they write japanese? Like, I have come to know a little hiragana and katakana, and I thought they would write the whole sentence in one writing method. But then I saw Mona-sama's twitter tweets and I recognised Kanji,hiragana and katakana in it. I am confused. Can you help me out?