
When the suspect of an arson case refuses to cooperate with the investigation, the detectives search his house and find a locked-up little girl. She doesn't talk and there are no clues to her identity, so assistant psychology professor Narumi Saku is asked to counsel her.
Naze Shoujo wa Kioku wo Ushinawanakereba Naranakatta no ka? is a Japanese movie of 12,909 characters, with 1,387 unique words and 667 different kanji. Its difficulty rating on Jiten is average, 2.8 out of 5. The full vocabulary list ranks all 1,387 words by how often they appear, and you can study them on Jiten or download them as an Anki deck.
Here are some of the words that appear most often in this media, as well as a sample of its rarer vocabulary.