JIS K 6400-1 Flexible cellular polymeric materials -- Determination of physical properties -- Part 1: General rules
JIS K 6400-2 Flexible cellular polymeric materials -- Physical properties -- Part 2: Determination of hardness (indentation technique) and stress-strain characteristics in compression
JIS K 6400-5 Flexible cellular polymeric materials -- Physical properties -- Part 5: Determination of tensile strength, elongation at break and tear strength