This standard specifies the mechanical, physical and optical properties that enable compatibility of 80 mm and 120 mm DVD-recorder pull discs (hereinafter referred to as discs).
JIS X 6245:1999 history
1999JIS X 6245:1999 80 mm (1.23 GB/side) and 120 mm (3.95 GB/side) DVD-Recordable-Disk (DVD-R)