This is a list of surnames in which the usage is Japanese; and the source is Other.
Igarashi 五十嵐, いがらし JapaneseFrom Japanese
五十 (i) meaning "fifty", an unwritten subject marker
が (ga), and
嵐 (arashi) meaning "storm".
Kanemaru 金丸, かねまる JapaneseFrom Japanese
金 (kane) meaning "gold, metal, money" and
丸 (maru) meaning "circle, round, whole".
Kubo 久保, くぼ JapaneseFrom Japanese
久 (ku) meaning "long time ago" and
保 (ho) meaning "protect".
Mutō 武藤, むとう JapaneseFrom Japanese
武 (mu) meaning "military, martial" and
藤 (tō) meaning "wisteria". The final character may indicate a connection to the Fujiwara clan.