につき

につき attaches to a noun to indicate cause, reason, or basis, often in formal or official contexts. It can also express a rate or quota per unit (per person, per item) or a time-bound statement like 'for the period'. It is more impersonal and official-sounding than casual expressions using ので or から. Typical contexts include notices, announcements, prices, and terms of service. When you want to show a direct cause (often in written notices), につき is a natural choice. Note that the form requires a noun before につき; it is not used with verbs. For per-unit meanings, think of it as 'per' or 'for each'.