Translation guide
A single sheet or fragment of paper. Japanese uses different counters and words depending on size, shape, and purpose.
The most common way to refer to one sheet of paper, like a piece of printer paper or notebook paper.
The standard way to say 'one piece of paper' using the counter 枚 (まい) for flat objects.
Please give me a piece of paper.
He wrote a note on a piece of paper.
Literally 'paper scrap', often used for a small or torn piece of paper, or casually for any piece of paper.
There was a piece of paper in my pocket.
Emphasizing that the paper is small, torn, or a leftover fragment.
When the paper serves a function, like a memo, slip, or form.
Referring to a document, certificate, or any official piece of paper.
The counter 枚 (まい) is used for flat objects like paper, tickets, and plates. For sheets of paper, say 一枚 (いちまい), 二枚 (にまい), etc. Without a counter, 紙 (かみ) just means 'paper' as a material.
Directly translating 'piece of paper' as 紙の一片 (かみのいっぺん) is unnatural. Use counters or specific words like 紙切れ or 一枚の紙.
紙切れに電話番号を書いた。
I wrote the phone number on a scrap of paper.
伝票にサインしてください。
Please sign the slip.
You need to submit one piece of paper (document).