The Osaka Castle stands as a symbol of the city's rich heritage, offering visitors a captivating blend of history and architectural grandeur. Built by the samurai Toyotomi Hideyoshi in the 16th century, the castle is viewed as a symbol of Japan's unification during that era. With its distinctive five-tier, eight-floor structure, which has been enhanced and reinforced over the years, it has borne witness to battles from the 1600s to World War II.