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Japanese Castles (19.6.12)- http://www.japan-guide.com/e/e2296.html
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Castle towns, life in feudal Japan (19.6.12)- http://www.skwirk.com.au/p-c_s-14_u-177_t-516_c-1919/act/history/medieval-and-early-modern-societies-japan/life-in-feudal-japan/castle-towns
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The castles of Japan (15.6.12)- http://library.thinkquest.org/C001119/parse.php3
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Background history (15.6.12)- http://www.jcastle.info/resources/view/9-Background-History
