noun
A school document that records a student's grades, attendance, and teacher comments. Commonly used in elementary through high school contexts.
学期末に通信簿をもらった。
I received my report card at the end of the term.
通信簿の成績が上がって嬉しい。
I'm happy that my grades on the report card went up.
Compound of 通信 (つうしん, 'communication') and 簿 (ぼ, 'record book'). The term reflects its function as a booklet for communicating a student's progress between school and home.