http://www.mod.go.jp/e/d_act/others/pdf/public_opinion.pdf

http://research.php.co.jp/research/foreign_policy/policy/post_3.php

http://www.kunaicho.go.jp/e-okotoba/01/address/okotoba-h23e.html

http://www.news-pj.net/npj/9jo-anzen/20110406.html

http://pbv.or.jp/blog/?p=316

http://newpacificinstitute.org/jsw/?p=8758

http://www.cfr.org/japan/us-japan-alliance-transformation-realignment-future-october-2005/p20745

http://www.pewglobal.org/2011/07/13/chapter-2-views-of-the-u-s-and-american-foreign-policy/