Itagaki Taisuke

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Explanation: 1837（天保8）年生。土佐藩出身。別名に乾退助、板垣正形。最高爵位は伯爵。父は上士乾正成。1861（文久元）年江戸藩邸会計･軍事職。1862（文久2）年御用人。1867（慶応3）年薩土盟約を締結。1868年東山道先鋒総督府参謀。高知藩大参事。1871年廃藩置県を主導。同年参議。1873年征韓論政変では征韓派の立場を取り下野。1874年愛国公党・立志社を結成、民撰議院設立建白書を提出。1875年参議に復職するも同年辞職。1881年自由党総理。1882年岐阜にて相原尚褧に襲撃される。同年外遊。1883年帰国。1884年自由党解党。1890年立憲自由党を結党。1896年内務大臣。1898年憲政党を結党、内務大臣。同年辞職。1919年死去。

Reference materials: 宮地正人ほか編『明治時代史大辞典第１巻』吉川弘文館、2011年、131～132頁（執筆：村瀬信一）。日本歴史学会編『明治維新人名辞典』吉川弘文館、1999年、83頁。