最高執行責任者

Etymology
From 最高 (さいこう, supreme) + 執行 (しっこう, operating) + 責任者 (せきにんしゃ, person in charge)

Noun

 * 1) chief operating officer, COO

Related terms

 * : chief financial officer, CFO
 * : chief information officer, CIO
 * : chief executive officer, CEO
 * : chief technical officer, CTO