Muzai Moratorium, also known as Innocence Moratorium, is the debut studio album by Japanese singer-songwriter Ringo Sheena, released on February 24, 1999, through Toshiba EMI and Eastworld. Sheena com

Yumiko Shiina, known by her stage name Ringo Sheena, is a Japanese singer, songwriter and musician. She is also the founder and lead vocalist of the band Tokyo Jihen.