Mikazuki No Koukai (ミカヅキの航海, Crescent Moon Voyage) is the debut studio album by Japanese pop singer and songwriter Sayuri.

Three songs were used as ending theme songs for anime, "Mikazuki", "Sore wa Chiisana Hikari no Youna" and "Parallel Line" for Rampo Kitan: Game of Laplace, Erased and Scum's Wish respectively.

The single was followed by "Sore wa Chiisana Hikari no Youna", "Ru-Rararu-Ra-Rurararu-Ra-", "Furaregai Girl" and "Parallel Line".

"Parallel Line" reached number 10 in the Oricon and Japan Hot 100, making it the highest-charting single in both chart for her to date.

[6][7] All tracks are written by Sayuri, except "Furaregai Girl" by Yojiro Noda and "Sore wa Chiisana Hikari no Youna" by Yuki Kajiura