Lighting of tunnels for motorrized traffic (FOREIGN STANDARD)
standard by Japanese Industrial Standard / Japanese Standards Association, 01/01/1990

General rules of recommended lighting levels (Amendment 1) (Foreign Standard)
Amendment by Japanese Industrial Standard / Japanese Standards Association, 01/01/2011

Quality management and quality assurance standards Part 1: Guidelines for selection and use
standard by Japanese Industrial Standard / Japanese Standards Association, 01/01/1994