Aoi Usagi
Background and release. "Aoi Usagi" was used as the opening theme of the NTV drama series "Hoshi no Kinka", which also starred Sakai. According to lyricist Makiho, she won a competition to write lyrics for Oda's composition to match the "Grimms' Fairy Tales"-influenced theme of the drama. "Aoi Usagi" peaked at No. 5 on Oricon's singles chart. It sold over 997,000 copies and was certified Double Platinum by the RIAJ, becoming the biggest-selling single in her career. The song was also ranked No. 1 downloaded song on the iTunes Store in 2009 before her drug  scandal with her then-husband Yūichi Takasō prompted Victor to withdraw all of her media from stores. The music video features Sakai performing Japanese Sign Language while singing the song, as she played a deaf and mute girl in "Hoshi no Kinka". She did a similar performance on the 46th "Kōhaku Uta Gassen" in 1995, her first and only appearance on NHK's New Year's Eve special. Makiho self-covered the song on her 1996 album "Aromatister" while Oda covered it on his 2006 cover album "Melodies". Sakai re-recorded the song as the B-side of her 2007  single "Sekaijū no Dare Yori Kitto". In 2014, Sakai recorded a Chinese-language version of the song, titled "Jìmò de xiǎo bì tù" (寂寞的小碧兔); this version is included in her 2016 compilation album "". In October 2021, Sakai re-recorded the song and placed an NFT of it and promo photos on auction to promote the fourth season of the drama series "Producer K", which marked her first drama appearance in eight years.