page_title: Ōishi Yoshio
section_title: Biography
hierarchical_section_title: Ōishi Yoshio / Biography
caption_attribution_description: 『大石内藏助良雄切腹之圖』Ōishi Kuranosuke Yoshio Sepuku no Zu (The Harakiri of Ōishi Kuranosuke Yoshio)
context_page_description: Ōishi Yoshio was the chamberlain of the Akō Domain in Harima Province, Japan. He is known as the leader of the Forty-seven Rōnin in their 1702 vendetta and thus the hero of the Chūshingura. He is often referred to by his title, Ōishi Kuranosuke.
context_section_description: He served Asano Naganori as the head chamberlain (hittōgarō (筆頭家老)) for the Akō estate, supervising the daily running of the castle and the samurai. Due to the Tokugawa rules which required all the daimyō to spend every other year in Edo (now called Tokyo) the chamberlain was a very important man and the de facto ruler of the estate when the daimyō was away. Having attained this office at a rather young age, he is said to have had the implicit trust of his lord.
  When Asano committed seppuku as punishment for his failed attempt to kill Kira Yoshinaka in Edo castle and the Tokugawa shogunate abolished the house of Asano of Akō, Ōishi was in Akō and managed all its administrative issues. He persuaded other samurai to vacate the castle to the agents of the Shogunate. During the next two years many people wondered what Oishi would do as he had a reputation as an honorable and capable man.
  He attempted to get the permission to re-establish the house of Asano of Akō but failed. He then began a careful plot to kill Lord Kira but to throw off suspicion spent time (and money) in the geisha houses of Kyoto. This type of ruse is referred to as hiru andon (昼行灯, daylight lantern) – appearing to be serving no useful purposes, and this term is frequently applied to Ōishi. He carried out his role well – and secretly coordinated the movements of the remaining loyal Asano samurai. Nearly two years passed before the attack was launched.
  In January 1703 (by the old Japanese calendar, the 12th month, 14th day) he, with 46 other Akō rōnin, attacked Kira at his residence in the Honjo neighborhood of Edo. Kira was killed and decapitated. After Ōishi dispatched Terasaka Kichiemon to inform Asano's widow Yōzeiin of  the deed, he and the remaining 45 rōnin went to Sengaku-ji in Shinagawa where Naganori was buried and there they were arrested.
  He and the other rōnin were ordered to commit seppuku. Since it was an honorable sentence rather than merely decapitation, everyone accepted this sentence as an honor.
caption: Painting of Ōishi Yoshio committing seppuku
exif: {"Image Orientation": "Horizontal (normal)", "Image XResolution": "400", "Image YResolution": "400", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop Elements 2.0", "Image DateTime": "2008:01:22 21:06:21", "Image ExifOffset": "164", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "302", "Thumbnail JPEGInterchangeFormatLength": "4595", "EXIF ColorSpace": "Uncalibrated", "EXIF ExifImageWidth": "2068", "EXIF ExifImageLength": "1128"}