On the award ceremony of the 43rd annual Kodansha Manga Awards, Haruba said it was "special to him" to be selected by Akamatsu Ken, who was one of the judges of the award and the creator of ''Negima!
Magister Negi Magi''.
2017
He is best known for his manga The Quintessential Quintuplets, which was serialized in Kodansha's Weekly Shōnen Magazine from August 2017 to February 2020.
2019
In May 2019, he won the award for Best Shōnen Manga at the 43rd annual Kodansha Manga Awards, alongside Ōima Yoshitoki's To Your Eternity.
It was the 5th best selling manga in Japan in 2019.
According to Haruba, his pen name "Haruba Negi" comes from the protagonist of Negima! Magister Negi Magi, Negi Springfield.