Much of this media was released only on physical formats (VHS or CD-ROM) that degrade over time. "Exclusive" digital transfers are the only way these cultural artifacts survive.
A Japanese singer and idol active in the late 80s/early 90s whose real name is also Nishimura Rika. She is known for anime theme songs like "Glass Kiss" and "Stand By Me". Shimakura Rika: A contemporary idol from the group BEYOOOOONDS rika nishimura six years 58 exclusive