noun
one side; one party; the other side; the other party
Refers to one of two sides or parties, often in a dispute, comparison, or physical arrangement. Can mean either 'one side' or 'the other side' depending on context.
See also: 片方
In negotiations, you can't just listen to one party's opinion.
道の片一方にだけ桜が植えてある。
Cherry trees are planted only on one side of the road.
noun, noun which may take the genitive case particle 'no'
one of a pair; the other one; the mate
Used for one item from a pair, such as shoes, gloves, or earrings. Often implies the other one is missing or being sought.
See also: 片方
靴下の片一方がどこかに行ってしまった。
One of my socks has gone missing somewhere.
この手袋の片一方、知らない？
Do you know where the other one of these gloves is?