A Japanese official and ally of the prime minister said the ruling party should discuss revising the constitution to to allow same-sex marriage.

Although the constitution doesn’t specifically rule out gay marriage, it doesn’t allow it either, according to NBC News. Kanoko Otsuji, an LGBT lawmaker, said a change isn’t needed because the constitution doesn’t ban gay marriage. But other activists say the legislature should amend it. 

"The constitution did not envision same-sex marriage when it was written...but it was not prohibited," Gon Matsunaka, head of Pride House Consortium, which promotes LGBTQ awareness told NBC. "Society and the world have changed and it is the responsibility of the legislature to pass a law in line with that."

Nearly 80 percent of Japanese 20 to 50-year-olds favored legalising gay marriage, NBC News reported.