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one person
ordinary; common
「一方」 has another reading with different meanings.
すみません、あの一方の方はどなたですか。
Who is that person?
多くの方々から一方ならぬご支援を賜り、深く感謝申し上げます。
We are deeply grateful for the extraordinary support received from many people.
彼が来るのを一方ではずっと待っていた。
On one hand, I was waiting for him.