A group of lawmakers on Tuesday launched a multiparty caucus to examine discrimination against sexual minorities in a move expected to further intensify debate ahead of the 2020 Tokyo Olympics.

The group, led by Liberal Democratic Party member and former education vice minister Hiroshi Hase, Democratic Party of Japan policy chief Goshi Hosono and Komeito member Masaaki Taniai, said it is planning to study overseas laws on same-sex unions as well as canvass the lesbian, gay, bisexual and transgender community.

The group, however, has no plans to draft any bills relating to sexual minorities, Hase, who heads the caucus, told reporters after its first meeting.