A case or box for holding pencils, pens, erasers, and other writing tools; commonly used by students and workers.
小学生のころ、可愛い柄の筆箱を持っていた。
When I was an elementary school student, I had a cute patterned pencil case.
筆箱の中身を整理して新学期に備えた。
I tidied the contents of my pencil case to prepare for the new semester.
高級な筆箱には万年筆専用の仕切りが付いていることがある。
Some high-end pencil cases have dividers made specifically for fountain pens.