Osaka

Osaka is a designated city in the Kansai region of Honshu in Japan. It is the capital city of Osaka Prefecture and as of 1 January 2012, has an estimated population of 2,668,586. Osaka is also the largest component of the Keihanshin Metropolitan Area, the second-largest metropolitan area in Japan and the 10th largest urban area in the world with more than 19 million inhabitants. Osaka was traditionally considered Japan's economic hub. By the Kofun period it had developed into an important regional port, and in the 7th and 8th centuries, it served briefly as the imperial capital. Osaka continued to flourish during the Edo period and became known as a center of Japanese culture. Following the Meiji Restoration, Osaka greatly expanded in size and underwent rapid industrialization. In 1889, Osaka was officially established as a municipality. Osaka is a major financial center of Japan.

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Cold planets exist throughout the galaxy, even in the galactic bulge. Researchers led by Osaka University and NASA have used gravitational microlensing to detect cold planets similar to Jupiter and Neptune throughout the Milky Way, from the galactic disk to the galactic bulge.

Preseismic atmospheric radon anomaly associated with 2018 northern Osaka earthquake

Preseismic atmospheric radon anomaly associated with 2018 northern Osaka earthquake