- Parco, the place where Tsukimi was trying to see a jellyfish photo exhibition is a real Shibuya store.
- Banba mentions "old Tamagawa streetcars in Shibuya".
"In its heyday, trains on the Setagaya Line, which ran about five kilometers from Sangenjaya to Shimotakaido — a branch of the Tamagawa Line streetcar service between Shibuya and Futakotamagawa — were always packed with shoppers. The trains and streetcars were so packed that passengers would hang outside on window frames as the carriages were so full. However, with the improvement of transport systems in the area, Sangenjaya lost its vitality and atmosphere. In 1969, the Tamagawa streetcar was closed down." (Source)
- Mayaya receives capsule figurines of Xiahou Dun, Xiahou Yuan and Cao Cao
- The flyer given to Jiji is for the "Chii sanpo fair". Chii sanpo (ちい散歩) is a TV Asahi series, hosted by Takeo Chii (b. 1942).
The Iriomote cat (Prionailurus iriomotensis; Japanese: 西表山猫 Iriomote-yamaneko), is a wild cat about the size of a domestic cat that lives exclusively on the Japanese island of Iriomote. It is considered a "living fossil" by many biologists because it has not changed much from its primitive form. The Iriomote cat is one of the most threatened species of cat (sometimes considered a subspecies of the leopard cat), with an estimated population of fewer than 100 individuals. (Source)
- Tsukimi says the only time she has worn makeup was when she put on lipstick to attend the Shichi-Go festival. This is a festival celebrated by parents on the fifteenth of November in Japan, to mark the growth of their children as they turn three, five and seven years of age.
- The scene in which Tsukimi runs to Clara as she pushes herself out of a wheelchair refers to the story of Heidi, which has a character named Clara.
"Clara becomes stronger on goat's milk and fresh mountain air, but Peter, feeling deprived of Heidi's attention, pushes Clara's wheelchair down the mountain to its destruction. Without her wheelchair, Clara attempts to walk and is gradually successful." (Source)