Mizuki Tsujimura (辻村深月, Tsujimura Mizuki, born February 29, 1980) is a Japanese writer from Fuefuki, Yamanashi.Tsujimura specializes in mystery novels. She writes both for adults and children. Tsujimura is the winner of the 2018 Japan Booksellers' Award for her novel Lonely Castle in the Mirror. After being shortlisted several times for the Naoki Prize, she finally received the 2012 Naoki Prize for Kagi no nai Yume wo Miru (I Saw a Dream Without a Key)