Najimi is a Japanese manga artist and illustrator known for creating original manga works, several of which have been adapted into short-form anime. The creator uses the pen name なじみ (Najimi) and has been professionally active since at least 2019.

One of Najimi's notable works is the manga Girls' Fist!!!! GT, which is itself part of a larger media mix project. Najimi is credited as the author of this manga series, which began serialization in Kadokawa's Dengeki Twitter Magazine in July 2021. The story follows four high school girls who form a rock punk band, with the narrative centered on their dream of performing at a music festival. This manga was subsequently adapted into a 13-episode short anime that premiered on YouTube on May 22, 2024, with Najimi receiving credit as the original creator. The anime is a complete original short story based on Najimi's manga.

Beyond Girls' Fist!!!! GT, Najimi has authored several other manga series, many published by Houbunsha. These include the four-panel manga Convenience Store Night Shift Demon Girl, which began serialization in August 2022, and Teacher Shoko!, which ran from April 2019. Najimi has also contributed to anthology works, including the Bocchi the Rock! Anthology Comic in 2024. The creator has collaborated with publishers such as KADOKAWA and Houbunsha.

The creator's body of work often involves four-panel comic formats and character-driven comedy set in everyday or hobbyist environments, such as convenience stores or school band clubs. Najimi has also taken on roles beyond writing, receiving credit for original artwork, supervision, and production cooperation on the Girls' Fist!!!! GT anime adaptation. The creator's professional output is established through verified publication records and anime production credits, marking Najimi as a contributing creator in the manga and anime industry.