There are two artists with this name:

1.) Tsukasa (aka. 矢鴇つかさ / Tsukasa Yatoki) of the circle Sound Online, is a doujin artist who creates trance and j-core, both arranging video game music and composing original works.

2.) A Japanese female vocalist who goes by the name TSUKASA. She is signed to Spacey Records and is well known for her upbeat songs with pop styled vocals which, along with the various remixes by artists such as Shohei Matsumoto and Delaction have long been staples of various J-trance compilations such as Hime Trance. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.