- April 1, 1925: The area that became Higashinari-ku was incorporated into Osaka as part of the second major expansion of the city. The ward was created from the former district of Higashinari-gun, but not including the area that was previously Sumiyoshi-gun.
- October 1, 1932: A portion was split off to create Asahi-ku.
- April 1, 1943: Jōtō-ku and Ikuno-ku were split off.
In 1925, Higashinari-ku was a vast ward covering most of northeastern Osaka. By 1943 however, it had become one of the smallest wards second only to Naniwa-ku, after two re-drawings of its boundaries. Nevertheless, its population density is still the fourth highest among the wards of Osaka, after Jōtō-ku, Nishi-ku, and Abeno-ku.
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Media related to Higashinari-ku, Osaka at Wikimedia Commons
- Official website of Higashinari (in English)