"Toro Nagashi" which is also referred to as "Shoryo Nagashi" (floating lanterns down a river carrying the spirits of the dead) is a Japanese festival where people hold a memorial service for the spirits of the deceased by floating paper lanterns and other offerings in a river or in the sea for Bon festivals.
灯籠流し（とうろうながし）または精霊流し（しょうりょうながし）は、死者の魂を弔って灯籠（灯篭）やお盆の供物を海や川に流す日本の行事。