May 14, 2019
On May 14, 2019, the Cabinet approved the Cabinet Order for Partial Revision of the Order for Measurement Units.
1. Purpose of the revision
The Measurement Act aims to: establish measurement units as standards based on which businesses are able to conduct measurement, thereby secure the reliability of transactions in people’s everyday lives involving economy and society and make such units functional as a basis of a safe and secure society.
The Act stipulates measurement units as standards based on which businesses are able to show the scale of certain events using numerical values, such as length, mass and time, and, along with this, it also establishes the definitions of respective measurement units so as to fix the details of such units.
In November 2018, the Bureau International des Poids et Mesures (BIPM) held its general assembly and decided on the revision of definitions of measurement units under the International System of Units (SI), an internationally-agreed system of units. In line with this decision, the Ministry of Economy, Trade and Industry (METI) will revise the definitions of the measurement units under the Order for Measurement Units.
2. Outline of the revision
In November 2018, the BIPM held its general assembly and decided to revise the definitions of four measurement units kilogram (Mass), ampere (Electricity), kelvin (Temperature) and mole (Amount of Substance) into those using the fundamental physical constants.
In line with the BIPM’s decision on these four measurement units, METI will revise the current domestic definitions of these units into those using the defined values concerning the fundamental physical constants.
3. Future schedule
Promulgation: May 17 (Fri.), 2019
Enforcement: May 20 (Mon.), 2019
For further information, visit the Japanese language website.
Division in Charge
Metrology Policy Office, Industrial Science and Technology Policy and Environment Bureau