Reappearance of Anohana's Iconic Prop: The child monk cardboard figure which appeared in Anohana (both 2011 TV series and 2013 movie version) in the Jorin-Ji Temple (a real-life locale in the Saitama Prefecture of Japan), reappeared early on in this movie in the Daiji-Ji Temple (another real-life locale in Saitama).
Nakamura's son, Masatsugu, is often seen wearing a jacket in the movie with the big letters "ANH" and a "flower" symbol at the back. This is a reference to "A-No-Hana", the first movie in the trilogy by the same anime production team.