Shot in 18 days.
When Casey shows Jin her school, Jin comments: "That's brutal". The referenced building (Southside Elementary in Columbus, Indiana) was created by Eliot Noyes in Brutalist style.
In an interview after a screening of the film, Kogonada stated that one of the major influences for the film was filmmaker Yasujirô Ozu, particularly his film Viaggio a Tokyo (1953).
Kogonada visited Columbus on holiday. Inspired by the city's architecture, he stated that he "deeply wanted it to be a part of the first film I made". He describes the buildings there as having "an extraordinary premise for drama" and that the architecture of which forms the common ground between Jin and Casey when they are first introduced.