一部
いちぶ
adverbial noun (fukushitekimeishi)
noun (common) (futsuumeishi)
one part
one portion
one section
some
one copy (e.g. of a document)
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一分
いちぶ
noun (common) (futsuumeishi)
one tenth
one hundredth
one percent
one tenth of a sun
one quarter ryou (an old coin)