Kazuya Kawaguchi (河口 和也, Kawaguchi Kazuya; born 1963) is a Japanese sociologist and a professor in the Faculty of Humanities at Hiroshima Shudo University. He has publicly identified as gay and conducts research on same-sex marriage and partnership declaration systems. Kawaguchi is also active in advocating for legal reforms by giving lectures across Japan. He played a central role in conducting Japanese nationwide surveys on public awareness of sexual minorities (such as LGBT individuals) in 2015 and 2019.
Source: “Kazuya Kawaguchi”, English Wikipedia (CC BY-SA 4.0), excerpt