JIS

Specification and qualification of welding procedures for metallic materials -- Welding procedure test -- Part 2: Arc welding of aluminium and its alloys (FOREIGN STANDARD)
standard by Japanese Industrial Standard / Japanese Standards Association, 01/01/2003

Friction welding of metallic materials (Foreign Standard)
standard by Japanese Industrial Standard / Japanese Standards Association, 01/01/2016

Standard qualification test and acceptance requirements for manual welding technique
standard by Japanese Industrial Standard / Japanese Standards Association, 01/01/2018

Standard qualification procedure for welding technique of plastics (FOREIGN STANDARD)
standard by Japanese Industrial Standard / Japanese Standards Association, 01/01/2002