
Kaoru Touno heard a rumor: The laws of space and time mean nothing to the Urashima Tunnel. If you find it, walk through and you’ll find your heart’s desire on the other side…in exchange for years of your own life. On the night Kaoru just so happens to find himself standing in front of a tunnel that looks suspiciously like the one the rumor describes, he finds himself thinking of Karen, the sister he lost in an accident five years ago. To Kaoru’s surprise, he’s been followed by the new transfer student Anzu Hanashiro, who promises to help him experiment with the mysterious tunnel–but what does she want from Kaoru in exchange? And what will he have left to give, after the tunnel’s done with him?(Source: Seven Seas Entertainment, edited)
Natsu e no Tunnel, Sayonara no Deguchi is a Japanese novel of 120,870 characters, with 7,180 unique words and 1,663 different kanji. Its difficulty rating on Jiten is average, 2.1 out of 5. The full vocabulary list ranks all 7,180 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.