Moon is the third full-length studio album released by Japanese solo artist Gackt on June 19, 2002. Instead of a booklet, the album comes with a printed note by the artist, asking readers to "sense" the record's story, rather than analyzing the lyrics. The booklet was eventually included in the packaging of Moon's 2003 follow-up Crescent. Both albums are conceptually linked, as well as his more recent album Diabolos from the "Moon Saga".
The album was released on 19 June 2002, by Nippon Crown. In the initial counting week of July it reached number two on the Oricon charts, with sales of 185,840 copies. It charted for 10 weeks. In 2002, with sales of 281,590 copies, was the 67th best selling album of the year. As since its release the album has sold more than 250,000 copies, was certified Gold by the RIAJ.
The first single "Another World" became Gackt's first to reach the top two on the charts. The single reached number two on the third counting week of September 2001, with sales of 111,560 copies. In the upcoming weeks, it was at number three and eight respectively, with sales of 42,490, and 22,850 copies. It charted for 17 weeks, of that eight in the top twenty. In 2001, with 255,640 copies sold, it was the 74th best-selling single of the year, and it sold over 284,550 copies, most of any of his singles, and it is the only second (and latest) to sell over two hundred thousand copies. It was certified Gold by RIAJ.
The second single "Wasurenai Kara" reached number four on the initial counting week of May 2002, with sales of 78,310 copies. It charted for 5 weeks. In 2002, with 132,260 copies sold, was the 98th best selling single of the year.
Moon is generally positive received by reviews. Allmusic author Alexey Eremenko gave the album a rating of 3.5 out of 5 stars, observing that "is a fine specimen of its kind", it's "fast, emotive, heavy but not scary", praising the slow-tempo somber song "Fragrance", but criticized the album because is "too fine and effective" it becomes "sterile", and "sounds too much like music in general". He concluded that "despite the few musical connotations it actually possesses", as "far as artificial (read: professional) Japanese music goes, Moon is definitely one monster of a record".