Nijo Castle is a nice example of ‘ringed’ building, where the
innermost ring held the main castle (called honmaru or ‘main ring’
or 'main citadel'), the second ring held warriors and storehouses
of weapons and other provision to defend the honmaru (called ninomaru
or ‘second ring’) and an outer, general defence circle (called sannomaru
or ‘third ring’) where vassals were stationed.
photo courtesy of youinjapan.net
Website: http://www.city.kyoto.jp/bunshi/nijojo/ in Japanese
http://www.city.kyoto.jp/bunshi/nijojo/english/index.html in English
Address: Nijojo-cho, Nijo-dori Horikawa Nishi iru, Nakagyo-ku, Kyoto 604-8301
Tel no.: +81 (0) 75-841-0096
Price: 600 yen
Opening times: 8:45-18:00 (last admittance 16:00). Closed during the New year period (26 December - 4 January) and each Tuesday of January, July, August and December*
*When Tuesday falls on a public holiday, the castle will be closed the following day instead.