- Hometown: Hokkaido
- Blood Type: O
- Height: 157 cm (5 ft. 1 in.)
D[di:] debuted in 2000 with her first comic Fantastic Silent which caught the attention of Hayao Miyazaki as well as impressing others. Then she released her sophomore comic Kigurumi, which was labeled a Novel-Comic and gained acclaim for starting a new literary genre.
In Japan she holds art gallery exhibitions of her work. D[di:] has lent her talents to the monthly Gothic Lolita fashion magazine KERA by creating comic strips for them as well as being the illustrator and inserter for the 2003 film Josee, the Tiger and the Fish.
In 2008 she worked on the manga turned into film Goth, which she made the title background and was an inserter for the film.
In 2010 she worked on the American film Spilce by making set art and was an inserter for that film as well.
- [2004.01.21] Shiroi Kakera (白いかけら; White Fragments)
- [2002.01] Kigurumi (キぐるみ; Kigurumi)
- [2003.02] Angel meat pie
- [2007.06] Damekko! Dahlia (ダメッコ!ダリア; Dammit! Dahlia)
- [2009.01] Chelsea (チェルシー)
- [2002.08] Donnie Darko (ドニー・ダーコ)
- [2006.08] Fire Star Man Diary (ファイアースターマン日記)
- [2008.08] Sento no Ningyo Hime to Majo no Mori (銭湯の人魚姫と魔女の森; The Witch and The Little Mermaid's Forest Bathhouse)
- [2009.03] Kigurumi: Novel (キぐるみ; Kigurumi)
- [2010.05] Fire Star Man Diary (ファイアースターマン日記)
- [2010.08] Hosei Ningen Nuiguruma (縫製人間ヌイグルマー; Sewn Human Nyuguruma)
- [2010.04] Yume no Nakanara Kimi wa Yasashi (夢の中ならキミはやさしい。; You are Friendly Even in my Dreams)
- [2011.10] Dobutsu no Kokoro Zukan (どうぶつのこゝろ図鑑; Encyclopedia of Animal Hearts)
- [2000.04] Fantastic Silent (ファンタスティック・サイレント)
- [2009.10] Ice Cream Giraffe (キリンとアイスクリーム)
- [2006.05] D[di:]'s WORKS
- [2003.12.13] Josee, the Tiger and the Fish (Title Background, Image Illustrator, Inserter)
- [2008.12.20] Goth (Title Background, Inserter)
- [2010.06.04] Spilce (Set Art, Inserter)