- Corporation name：MF Bunko J
- Official name：MF文庫J
- Chinese name：MF文庫J
- Other names：MF文库J
- Birthday：Jul 25, 2002
- Region：Japan
- Official website：https://mfbunkoj.jp/
『MF Bunko J』
MF Bunko J(MF文庫J) is a publishing label affiliated with the Japanese publishing company Media Factory.
It was established in July 2002 and is a light novel label that is aimed at young adult males with a focus on visual novel-style plots and harem romantic comedies.
