The album features all original recordings of the singles released from "Koi Hitoyo" (1988) through "Watashi ni Tsuite" (1990), as well as reworked versions with new vocal takes of Kudo's first batch of singles, from "Kindan no Telepathy" through "Mugon... Iroppoi".

Unlimited debuted at number two on the Oricon Albums Chart, with 134,000 units sold.

[3] The album held onto the top ten for another week, sliding to number nine and selling 29,000 copies.

[4] Unlimited spent another six non-consecutive weeks in the top twenty.

It charted for a total of eighteen weeks in the top 100, logging sales of 454,000 copies during its run.