Obon, also known as Bon, is a Japanese Buddhist festival observed every year from August 13 to 15. The festival, which has been celebrated in Japan for over 500 years, originally took place on the 15th day of the 7th lunar month but was fixed to the Gregorian calendar. Its name is derived from the Sanskrit word "Ullambana," meaning "hanging upside down," linked to a story of a Buddha disciple who sought to help his suffering mother in the realm of Hungry Ghosts. During Obon, families reunite and often visit and clean the graves of their relatives, honoring their ancestors. A notable tradition associated with the festival is the Bon Odori, or Bon dance, which varies by region and is performed exclusively during the three days of celebration.