The school is managed by the Iwate Prefectural Board of Education.

Morioka Third High School's symbol is the Ōtori, which corresponds to "freedom, peace, truth, dreams and intellect that will spread without limit".

The students are required to wear standard Japanese high school uniforms.

The school has daily sports club activities for kendo, judo, archery, athletics, basketball, volleyball, handball, table tennis, tennis, soft tennis, badminton, soccer, swimming, rowing, skiing, rugby, rhythmic gymnastics, baseball and skating.

Additionally there are clubs for the school newspaper, photography, chorus, brass band, theater, biology, flower arranging, astronomy, fine art, physics, Japanese literature and Go