noun
unsolicited promotion; uninvited solicitation
Legal and consumer-protection term for promotional approaches made without prior consent, such as spam or aggressive sales tactics.
不招請勧誘は特定商取引法で規制されている。
Unsolicited promotions are regulated under the Specified Commercial Transactions Act.
不招請勧誘の電話が増えている。
Calls involving uninvited solicitation are increasing.
Compound of 不 (negative prefix), 招請 (invitation), and 勧誘 (solicitation). The exact historical derivation is uncertain; the term is primarily used in modern legal contexts.