Forty-seven Ronin Remembrance Day (Sengaku-ji, Tokyo)

The revenge of the forty-seven rōnin , also known as the Akō incident or Akō vendetta, was a historical event in Japan in which a band of rōnin avenged the death of their former master on 31 January 1703. The incident has since become legendary. It is among the three major vengeance incidents in Japan, along with the Revenge of the Soga Brothers and the Igagoe vendetta.

Sengaku-ji (泉岳寺) is a Buddhist temple belonging to the Sōtō school of Japanese Zen located in the Takanawa neighborhood of Minato-ku, near Sengakuji Station and Shinagawa Station, Tokyo, Japan. It was one of the three major Sōtō temples in Edo during the Tokugawa shogunate, and became famous through its connection with the Akō incident of the forty-seven Rōnin in the 18th century.

Tokyo, officially the Tokyo Metropolis, is the capital and most populous city in Japan. With a population of over 14 million in the city proper in 2023, it is one of the most populous urban areas in the world. The Greater Tokyo Area, which includes Tokyo and parts of six neighboring prefectures, is the most populous metropolitan area in the world, with 41 million residents as of 2024.