He was promoted to the chief operating officer of the company.

He was appointed as the chief financial officer of our company.

He was appointed as the chief executive officer of the company.

He is the chief technical officer of our company.

He is active as the chief information officer of our company.

He is good at devising strategies for siege warfare.

He became the champion of the mixed martial arts competition.

The history of the Empire of Japan is very interesting.

The Empire of Japan, written as 大日本帝國 in Kyūjitai, was a nation that existed from 1868 to 1945.

The Imperial Japanese Army was a Japanese military force that existed from the Meiji era to the Showa era.