A junior high school run by a public authority (municipality); typically low-cost or free and serves local children.
うちの子は来年、公立中学校に入学する予定だ。
My child is scheduled to enter a public junior high school next year.
公立中学校の授業料は原則として無償だが、教科書や給食費は必要なことがある。
Tuition at public junior high schools is generally free, but things like textbooks and school lunch fees may be required.
地区によって公立中学校の教育方針や特色が異なる。
Educational policies and characteristics of public junior high schools vary by district.