Learn in the textbookExecutives and Their Roles
DefinitionThe CIO (Chief Information Officer, 最高情報責任者) is the executive with top responsibility for the company's information systems and its use of IT.
ExplanationStarting from the business strategy, the CIO sets an information strategy (a policy on how to use information and IT) to achieve it through IT, and directs investment in systems and the use of information. The job is to link business goals with IT efforts so the two do not drift apart.
AnalogyIt is like the architect's position when a house is built. The architect turns the way of life the owner wants into concrete drawings and a construction schedule.
Memory hookThe I stands for Information, but tying it to the I in IT works just as well. That makes it easy to link the title to the head of everything information-related.