He specializes in constitutional law, especially freedom of speech. His research focuses on how to balance freedom of speech with regulation of hate speech. His publications include works on hate speech, hate crime, critical race theory and free speech issues in Roberts Court. He earned his Ph.D. in Law from Doshisha University in 2015. During his time at the U.S.-Asia Law Institute, he will research how the United States responds to hate speech in law and practice.