Hajime Imai, 「憲法九条」国民投票 (Kenpō-Kyū-Jō" Kokumin-Tōhyō, "A Referendum on Article 9 of the Japanese Constitution"), 集英社新書 (Shū-Ei-Sha-Shin-Sho), October 10, 2003, pp. 31–38. 「憲法九条」国民投票 (页面存档备份,存于互联网档案馆)
Hikaru Ōta and Shin-Ichi Nakazawa, 憲法九条を世界遺産に (Kenpō-Kyū-Jō wo Sekai-Isan ni, "Let's Register Article 9 of the Japanese Constitution as a World Heritage Site"), 集英社新書 (Shū-Ei-Sha-Shin-Sho), August 17, 2006, 憲法九条を世界遺産に (页面存档备份,存于互联网档案馆)
憲法9条と自衛隊の現実Archive.today的存檔,存档日期2012-06-30 (Kenpō-Kyū-Jō to Jiei-Tai no Genjitsu, "Article 9 of the Japanese Constitution and the actual conditions of the Japan Self-Defense Forces")
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憲法9条と自衛隊の現実Archive.today的存檔,存档日期2012-06-30 (Kenpō-Kyū-Jō to Jiei-Tai no Genjitsu, "Article 9 of the Japanese Constitution and the actual conditions of the Japan Self-Defense Forces")
Hajime Imai, 「憲法九条」国民投票 (Kenpō-Kyū-Jō" Kokumin-Tōhyō, "A Referendum on Article 9 of the Japanese Constitution"), 集英社新書 (Shū-Ei-Sha-Shin-Sho), October 10, 2003, pp. 31–38. 「憲法九条」国民投票 (页面存档备份,存于互联网档案馆)
Hikaru Ōta and Shin-Ichi Nakazawa, 憲法九条を世界遺産に (Kenpō-Kyū-Jō wo Sekai-Isan ni, "Let's Register Article 9 of the Japanese Constitution as a World Heritage Site"), 集英社新書 (Shū-Ei-Sha-Shin-Sho), August 17, 2006, 憲法九条を世界遺産に (页面存档备份,存于互联网档案馆)