Take context from the input text and decide on the accurate relationship between 'Nintendo' and 'Satoru Iwata' from the options provided.
Options: business division, chief executive officer, operator, subsidiary

TOKYO, Sept 14 (Reuters) - Japanese videogame maker Nintendo Co Ltd said on Monday it was promoting Managing Director Tatsumi Kimishima to replace former President Satoru Iwata who died of cancer in July.
chief executive officer