 As an added note, even though the age of consent in Japan can be 13, the voting age is 18.The age of majority is 20 (a law to lower the age of majority to 18 is scheduled to take effect in 2022) and the driving age is 18.Article 24 of the Japanese Constitution states that "Marriage shall be based only on the mutual consent of both sexes and it shall be maintained through mutual cooperation with the equal rights of husband and wife as a basis."