Kachiya Matsuri - Lucky Arrow Festival. Held on May 5th. Kachiya Matsuri celebrates an event that happened in the Kameido area of Tokyo a long time ago. In 940 the samurai Fujiwara no Hidesato offered a bow and arrow to Kameido Katori Shrine in appreciation for his victory in battle. In 939 a local samurai rebelled against the Imperial Court and eventually titled himself the New Emperor. His name was Taira no Masakado. The Imperial Court in Kyoto ordered his rebellion crushed and charged Fujiwara no Hidesato and Masakado's cousin Taira no Sadamori to do so. Before setting out to battle, Hidesato prayed at Kameido Katori Shrine for victory. On March 25th, the armies faced off at the Battle of Kojima (in modern day Ibaraki Prefecture). Masakado though outnumbered chose his ground well and actually forced the Imperial army back. This success proved to be his undoing as Masakado pushed too far alone and a lucky arrow shot by an unknown hand struck him down and his army melted away