Matsukata

The elderly male director of the daycare facility "Wakaba Park." He is strict, short-tempered, and speaks in a rough manner, but possesses a compassionate nature. When E-Class students engaged in parkour, which was prohibited outside of class, Okajima caused an accident that resulted in the director sustaining a serious injury that would take two weeks to heal. Under the pretext of "this incident was due to my failure to supervise my students, and as their teacher, I must apologize and show sincerity," Koro-sensei revealed his true identity and background, which was originally forbidden, to this rare individual, but the secret remains undisclosed.

During the two weeks of recovery, E-Class students visited the facility, gained the trust of the children living there, and renovated the heavily deteriorated Wakaba Park into a two-story building, achieving results beyond the director's recovery period, and he sent them off with gratitude. Later, he visited the Kunugigaoka Junior High School festival with the children from the daycare facility.

After the assassination was completed, a portion of the success reward was donated by E-Class, and he was surprised along with Sakura, with their eyes popping out in astonishment. Additionally, after the renovation by E-Class, the facility began to be featured in the media, staff increased, and the management stabilized.