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Last name マサクニ (マサクニ ) , in the world, is quite a rare surname. The cognomen マサクニ is habitual in Eastern Asia, particularly Japan, where it is quite a rare surname.
Masakni, Masakuni, 昌国, 昌邦, and 正邦
キムラ, クメダ, ハヤシ, トヤマ, イノウエ, and ヤマモト