What is the relationship between 'Nintendo' and 'Tatsumi Kimishima' in the context of the input sentence.
Options: parent organization, subsidiary, chief executive officer, developer

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