Osaka Castle was established in 1583 by Toyoson Sioji (even for people who are completely unfamiliar with Japanese history, these names related to Osaka Castle are absolutely familiar, and it can be seen from this time how important Osaka Castle is in Japanese history). The reconstruction of Tokugawa Shogunate in 1620, The new government rebuilt and renovated in the 1930s, and it has been more than 400 years old!