1. ‘Causes and Electoral Consequences of Party Policy Shifts in Multiparty Elections’;Annual Review of Political Science,2012
2. ‘Yasukuni Sanpai, Beichūkan ga okoru wake Shikisha ni kiku’ (The Reasons Behind the Anger About the Prime Minister’s Visit to Yasukuni, Asking Experts);Asahi Shinbun,2013
3. ‘Dokushi no Tokuhain ‘Gaimushō ga kiji o kōgeki’ Tōkyō Taizai 5nen, Rinichi ni Zaishi Kokuhaku’ (After Five Years in Tokyo, German Newspapers Foreign Correspondent Reveals: ‘Foreign Ministry Targeted [My] Articles’ Upon Leaving Japan),2015
4. ‘Oshiete! Kekkon to Hōritsu: 1 Dōsei Kitei, Haikei ni Ie seido’ (Tell Me About Marriage and the Law: No. 1 Background of Regulation of Same Family Name for Married Couples to be Found in the IE-System),2015