Cognomen 小室 (Komuro 
, 小室 , Омуро 
) , globally, is a rare last name. The surname 小室 is habitual in Japan, where it is a rare surname, Singapore, where it is a very rare surname, and Brazil. In absolute terms, this name is the most popular in Japan, Brazil, and the United States. Much less frequently, 小室 is the forename as well as the last name.
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小室 哲哉 Japanese musician, songwriter and producer, JP (b. 1958) |
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小室 圭 clerk in Japan, JP (b. 1991) |
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| 小室 正幸 Japanese actor and seiyū, JP (b. 1948) |
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| 小室優太 JP (b. 1999) |
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