Edo Period

Edo Period / 江戸時代

This category includes all those castles that were active in the Edo Period. At the beginning of the Edo Period the "One Castle per province" edict forced the abandonment of thousands of smaller castles throughout Japan. The castles that remained into the Edo Period or were newly built in the Edo Period saw many changes to their construction compared to earlier castles. Since a lord could only have one castle, it tended to be bigger. Castles also shifted to Hilltops or Plains from the mountains to make them more accessible and easier to govern from. As techniques improved you would see also bigger stone walls, wider moats to prevent gunfire, and larger main keeps. Some of these techniques were developed at the end of the Sengoku Period in places like Azuchi Castle and Osaka Castle but they really became most widespread in the Edo Period to the point where you could say they were standard features of Edo Period castles.

Edo Period castles also includes a subset of fortifications called jin'ya. Jin'ya are basically fortified government offices. They were built for small domains (generally less than 30,000 koku of rice) where the lord did not have the qualifications to be a "castle lord." These were called "castleless lords" or "jin'ya lords". Jin'ya were also established for domains, like Takayama (see Takayama Jin'ya), that were directly under control of the Tokugawa government. Jin'ya are often listed as castles in castle books and materials.

There were 300 provinces (with some minor changes through the period) in the Edo Period, so you could say that in the Edo Period alone there were 300 active castles (including a handful of jin'ya)

Castles with Edo Period

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