SAMURAI CASTLES: Osaka Castle
Osaka Castle is one of Japan's largest, covering over 100ha. The 30m stone walls and 90m moat are impressive. Why was such a huge castle needed? Learn about the powerful daimyo who moved history.
Host Chris Glenn
The kagami-ishi, which indicates the lord's power, is about 30m high
 
A re-enactment of how the stones were quarried with 16th-century technology
A special type of loophole carved into the stone walls