Yuko Miyazaki is a lawyer and former justice of the Supreme Court of Japan, serving from 2018 to 2021.
In 1979, after having worked as a legal apprentice, Miyazaki registered with the Daiichi Tokyo Bar Association and began practicing as a taxation attorney.
[5][6][7] Miyazaki is noted as foregoing tradition and becoming the first justice to issue rulings under her maiden name.
[9] On June 23, 2021, Miyazaki dissented in 11-4 decision involving a married couple that wished to have their marriage registration accepted under separate last names.
The majority found that the provisions of the Civil Code of Japan and the Family Register Act that require married couples to have the same last name do not violate Article 24 of the Japanese Constitution, but in a dissenting option with Katsuya Uga, they would have ordered the city to accept their marriage registration.