Natsuki Uchiyama, an 18-year-old member of the all-female idol group AKB48 who is known for reciting passages from the Constitution on stage, has now co-written a book about her favorite subject.

"Constitutionalism," written in collaboration with Shigeru Minamino, an associate professor at the Kyushu University School of Law, attempts to introduce the essence of Japan's Constitution in a comprehensible manner.

Uchiyama said she shares her enthusiasm in hopes of getting other Japanese teenagers interested in constitutional discourse.