Compliance with JIS K 6301 standard was established in 1950 and had sustained base of rubber industry of our country but was discontinued in 1998 because it did not comply with ISO and also JIS K 6253 was prescribed on its behalf. However, It had been used for 60 years as “Rubber hardness tester” and even now it is used as test data between certain parties in charge with mutual consensus although movement to new JIS has progressed