Masakazu Iwasaki is a Japanese manga artist known for creating comedic series, most notably Kemeko Deluxe!, which was adapted into an anime. A graduate of Tokyo Design College, Iwasaki resides in Kashiwa, Chiba Prefecture. His professional career began in 2001 when he made his debut in MediaWorks' magazine Monthly Dengeki Comic Gao!. Prior to his debut, he had submitted numerous works to publications such as Kadokawa Shoten's Monthly Shonen Ace and Square Enix's Monthly Shonen Gangan, though they were not initially accepted for publication.

Iwasaki is best recognized as the original creator of Kemeko Deluxe!, also known as Steel Bride. The manga began serialization in Monthly Dengeki Comic Gao! on October 27, 2005, and was published by ASCII Media Works. The series later continued in Monthly Comic Dengeki Daioh, concluding on June 27, 2011, and was compiled into nine tankobon volumes. The story, a blend of romance, comedy, and science fiction, centers on a young man whose life is disrupted by a mysterious, high-tech robotic bride. The manga's popularity led to a television anime adaptation, which was broadcast from October to December 2008.

Beyond his most famous work, Iwasaki has authored several other manga series. His earlier works include Popo Kan, which ran for three volumes. Following the conclusion of Kemeko Deluxe!, he created Ashita no Kyouko-san, a series that was serialized in Dengeki Daioh Genesis and later moved to the Dengeki Daioh web comic platform, spanning seven volumes. He also produced Miyamoto-san Honki de Yamete Kudasatte, a two-volume series. In addition to his own serialized comics, Iwasaki has contributed illustration work to other anime productions, providing end card illustrations for episodes of Gabriel DropOut and Hanamaru Kindergarten. His body of work is consistently categorized within the comedy genre.