aerial view of Osaka Japan Osaka Castle 大坂城 or 大阪城 is a Japanese castle in Chūō-ku, Osaka, Japan. The castle is one of Japan's most famous landmarks and it played a major role in the unification of Japan during the sixteenth century of the Azuchi-Momoyama period. Osaka 大阪市 is a designated city in the Kansai region of Japan. It is the capital city of Osaka Prefecture and the largest component of the Keihanshin Metropolitan Area, the second largest metropolitan area in Japan and among the largest in the world with over 19 million inhabitants. Situated at the mouth of the Yodo River on Osaka Bay, Osaka is the second largest city in Japan by daytime population after Tokyo's 23 wards and the third largest city by nighttime population after Tokyo's 23 wards and Yokohama, serving as a major economic hub for the country. osaka japan points of interest, osaka japan weather, osaka japan map osaka japan food, osaka flights, osaka points of interest, osaka shopping, osaka hotels, Things To Do In Osaka how to get to osaka castle osaka castle map osaka castle history osaka castle inside osaka castle blog osaka castle pantip osaka museum of history nishinomaru garden