Kiyosu city is in Aichi prefecture in Japan. There is replica of the original Kiosu castle in this city.
At the start of the movie the Honnoji incident, a famous historical event in Japan, can be seen. It happened on June 21st 1582. Oda Nobunaga and his son Nobutada die after been attacked by Akechi Mitsuhide's forces. Oda Nobunaga was at that time the most powerful warlord in Japan. Akechi may have been trying to become the new top warlord but he was killed a few days after the Honnoji incident. In this movie we see Akechi killed in a bamboo forest..
The actor Toshiyuki Nishida playing the character Rokubei Sarashina appears briefly in a forest about to attack one of the main characters. Nishida played a major role as Rokubei Sarashina (in ghost form) in the 2011 movie "Sutekina Kanashibari" .
This movie is based on a true historical event.