Joshi kōsei explained

Joshi kōsei, joshi kousei or joshikōsei (Japanese: 女子高生|link=no) literally means "high school girl". In English usage the term may refer to:

• High School Girls, a comedy manga series by Towa Oshima
• Joshi Kausei a comedy manga series by Ken Wakai.
• Oku-sama wa Joshi Kōsei, a manga series by Hiyoko Kobayashi
• JK business, compensated dating with adolescent girls in Japan
• A homonym (Japanese: 女子校生|link=no, joshi kōsei, which can mean "girl student") that is used to label Japanese pornographic videos hinting that high school girls are portrayed