Having read C. S. Lewis' Chronicles of Narnia at a very early age, she decided to become a fantasy writer.
Her first book, Sorairo Magatama (空色勾玉, "Sky-colored Jade") won her several awards for children's literature and was translated into English by Cathy Hirano as Dragon Sword and Wind Child; the English version was out-of-print until it was re-released by Viz Media in October 2007.
The two sequels, Hakuchou Iden (白鳥異伝, "Swan's Strange Legend") and Usubeni Tennyo (薄紅天女, "Pink Nymph"), have only been published in Japanese.
Another of her works is Nishi no Yoki Majo (西の善き魔女 "Good Witch of the West Astraea Testament"), a western-styled high fantasy series featuring a girl on the quest of finding out the mysteries surrounding the legends of her country and her friends.
Nishi no Yoki Majo has been adapted into a manga series by Haruhiko Momokawa in Comic Blade, and licensed for English publication as The Good Witch of the West.