"Hikone Manto Nagashi," a floating lantern event where "Genbaku-no-hi," or flames divided from the blaze right after the Hiroshima atomic bomb attack, were transferred into lanterns and people floated them on the Seri River praying for their ancestors' souls and peace, was held around the Seri-bashi Bridge along the Seri River, Hikone City, Shiga Prefecture, on the evening of August 6, "Genbaku-no-hi," or atomic bomb day. The event was organized by the executive committee comprised of shopping street leagues and chambers of commerce and industry in Hikone City.

At around 7:00 p.m., approximately 800 hexagonal lanterns, 20 centimeters in height, on which residents and others had written their ancestors' names and wishes, were lit, then released from the riverbanks one after the other to float on the river.

Families and visitors watched as the lanterns floated away, one after another or in clusters on the current flowing faster due to rain. Prior to lighting, a Buddhist service was performed by priests belonging to "Hikone-shi Bukkyo-kai," or Hikone Buddhist organization, at the adjacent Jyoganji Temple.

Genbaku-no-hi was passed on to Honkakuji Temple, Hinatsucho, Hikone City, from its distributor in 1992. This fire has been used in "Manto Nagashi" since 2007.