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そっか。みなさん、どなたか木村さんのことしりませんか。
Thankyou.
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marked as duplicate by Chocolate♦, Earthliŋ♦ Jun 10 '17 at 17:13
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It means "About".
"Is that so? Does any of you guys know about Mr.Kimura?"
Whenever Koto comes after a name,likely it'll stand for "about (the person)".
