Hasebe Yasuo is a professor of law at Waseda University. He is one of the constitutional scholars who strongly opposed the security bills in 2015.

The government invited him to the Diet for suggestions on the bills, and he argued that the bills would be unconstitutional. This fueled criticism against the government for pushing the bills in order to legislate Japan’s ability to exercise its collective self-defense right.

He is also a founder of Rikken Demokurashī no Kai (立憲デモクラシーの会), a political campaign group that aimed to stop the bills. He regularly uploads his essays to his website.