Chief Sakurada

The chief of Earth Self-Defense Army in the Far East branch, he recruited Captain Akiyama as the first leader of Science Guard.

Big Good: He is the leading chain of command in the Japanese branch of the Earth Self-Defense Army.

Only One Name: He's only known for one name in the production notes and in-universe. Sakurada may be his family name, given the Japanese' tradition of calling someone other than their family in Last-Name Basis.

Reasonable Authority Figure: When the rest of the Self-Defense Army berated Gondou for leading the Science Guard Party away from Earth to fight Heller in space, Sakurada was the only person to smile while other executives were protesting. It’s implied that like Gondou, he knows it well that the Heller army would continue attacking the Earth as long as their base on Saturn remained intact.

(Source: TVTropes.org)