You can request or recommend purchasing a book if you wish the book to be in the library.
The Central Library accepts purchase requests. Please refer to the following link.
https://www.nul.nagoya-u.ac.jp/central/request_e.html
Some department libraries also accept purchase requests. Please check the website of the department's library to which you belong.
https://www.nul.nagoya-u.ac.jp/guide/map/index_e.html