is the seventeenth studio album by Japanese singer Shizuka Kudo. It was released a day shy of Kudo's 30th anniversary, on August 30, 2017, through Pony Canyon. The album marks Kudo's first studio album in over twelve years and includes nine original songs written by Japanese singer-songwriters Koji Tamaki, Tak Matsumoto and Kaori Kishitani, among others. it also features various collaborations with veteran songwriters, including lyricist Gorō Matsui, a long-time collaborator of Kudo's, as well as with new talent, such as Niconico utaite Mafumafu, the singer-songwriter duo Yoshida Yamada and first-time songwriter and author Shizuka Ijūin, while Kudo serves as the album's executive producer. The album was released in two versions: a standard edition and a limited, first press edition, which comes with two DVDs including 34 of Kudo's earlier music videos as well as three new ones for the songs "Hagane no Mori", "Kasumisō", and "Kinki to Tsukiakari". It charted at number 21 on the Oricon Albums Chart, marking Kudo's highest-charting studio album in close to twenty years, since I'm Not (1999). Background Kudo announced the release of Rin via a press release on July 28, 2017. It is her first studio album in twelve years, since Tsukikage. Kudo explained in an interview with Yahoo! Japan that she decided two years prior to the album's release that she wanted to create an album of new, original material for her fans to mark her 30th anniversary as a solo singer. The singer told Yahoo: "As a token of my gratitude to my loyal fans, I wanted to create every song on the record from scratch." Despite Pony Canyon executives floating around the idea of possibly throwing older songs into the mix, Kudo declined, insisting on only presenting new songs to her audience. Writing and composition On her collaboration with B'z guitarist Tak Matsumoto on the song "Mitsu to Toge", Kudo explains that during the writing process for the album, she had recalled Matsumoto casually promising, roughly twenty years prior, to compose a song for her. When she reconnected with Matsumoto, she asked him for a "manly" hard rock song, which she reveals to Yahoo, is her favorite musical genre. She originally was going to write the lyrics to go along with the resulting track, but changed her mind and tasked author Shizuka Ijūin, whom she had met at a prior work function, to write them instead. For the album, Kudo