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In page Osaka:

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By the Edo period, 大坂 (Ōsaka) and 大阪 (Ōsaka) were mixed use, and the writer Hamamatsu Utakuni, in his book Setsuyo Ochiboshu published in 1808, states that the kanji was abhorred because it means "returns to the earth," and thus was used. The kanji (earth) is also similar to the word (knight), and means against, so can be understood as "samurai rebellion."[citation needed] was the official name in 1868 after the Meiji Restoration. The older kanji (坂) is still in very limited use, usually only in historical contexts. As an abbreviation, the modern kanji han refers to Osaka City or Osaka Prefecture.