one side; the other side; one party
Refers to one of two sides, directions, or parties. Often used in contrastive pairs (一方…他方…).
One side of the road was under construction.
It's not good to listen to only one party's opinion.
on the one hand; on the other hand
Used to present contrasting points, often in the pattern 一方で or 一方、. The second part may be implied.
See also: 他方
He is kind. On the other hand, he can be strict.
Connects two clauses to show a contrast or simultaneous situation. Similar to sense 2 but often used mid-sentence without explicit pairing.
The older brother is good at sports, whereas the younger brother is good at studying.
noun, noun, used as a suffix, adverb
keep on ...ing; tend to ...; only ...
Attaches to nouns, adjective stems, or plain verbs to indicate a continuing trend or one-sided change. Often used for undesirable or unstoppable tendencies.
Prices just keep rising.
His condition only got worse.
He is strict about work, but on the other hand, he's kind to his subordinates.
The older brother is lively, whereas the younger one is quiet.
Prices just keep going up.
One of the twins is a doctor, and the other is a lawyer.
片方 is the everyday word for 'one of a pair' (like one shoe), while 一方 is more formal and also covers abstract parties, not just physical pairs.
片側 describes one physical side of a concrete object like a road or vehicle, while 一方 is broader and often used for abstract directions, parties, or aspects.
一方 is the more common, everyday word for 'one side' or 'on the other hand', while 他方 is a more formal, literary term used specifically for 'the other' of two things and appears far less often.
一方 is the common word for 'on the other hand' in everyday speech, while 一面 is more formal and typically used in written or structured arguments.
一方 highlights a contrast or parallel between two facts, while 傍ら (in its 'while doing' sense) marks a secondary activity carried out alongside a main occupation.
一方 is a broader connector for "on the other hand/meanwhile" usable even between unrelated topics, while 半面 specifically contrasts two aspects of one and the same thing.
一方 introduces a contrasting or additional point ('on the other hand'), similar to sense 3 of 同時に, but 同時に adds a stronger nuance of simultaneity.
一方 is a very common conjunction for 'meanwhile/on the other hand' in everyday speech, whereas 他面 is stiffer and confined to formal or written contexts.
一方 means 'on the other hand' and is often paired with また (また一方で) to introduce a contrast, but used alone it is more formal and noun-like than また.
双方 means 'both sides/parties' while 一方 means only 'one side/party', so they are easy to mix up but opposite in scope.
一方 (as a noun/conjunction meaning 'one side' or 'on the other hand') shares its kanji with 一方的 but lacks the 'unbalanced/unilateral' nuance that 的 adds.
一方 alone usually means 'on the other hand' or 'one side' in general statements, while 一方通行 specifically names one-way traffic or a one-sided process.