Wikipedia
Wakkyanai (Z)
is the fourth single from the Japanese pop group Cute, released on July 29, 2006 on fb indie label.
The character (Z) is pronounced as (the Japanese pronunciation of Z) in the title, but the pronunciation is changed into in song as in Wakkyanaize.
This title is a play on words being that "Wakkyanaize" itself has no true meaning. It is only an indirect translation of colloquial into the English idiom "it's easy", after being deformed deliberately to achieve an English-sounding title.
This song was their initial original tune, and was first sung on November 27, 2005 at a fan club event. In June 2006, it was chosen as a theme song for and was decided to be released in July.
This was the final release to feature Megumi Murakami.