Take context from the input text and decide on the accurate relationship between 'Tatsumi Kimishima' and 'Nintendo' from the options provided.
Options: employer, platform, distribution format, chief executive officer

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.
employer