General rules of recommended lighting levels (Foreign Standard)
standard by Japanese Industrial Standard / Japanese Standards Association, 01/01/2010

Classification of fluorescent lamps and light emitting diodes by chromaticity and colour rendering property
standard by Japanese Industrial Standard / Japanese Standards Association, 01/01/2019

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