noun
sole agency authority; exclusive distribution rights
A legal and business term for the right to be the sole agent or distributor. Marked as rare; likely encountered in contracts or formal business contexts.
その会社は日本における一手販売代理権を取得した。
The company obtained the sole agency authority in Japan.
独占販売権 also means exclusive sales rights, but 一手販売代理権 specifically emphasizes the role of an agent (代理) rather than just exclusivity.
Compound of 一手 (いって, 'one hand; sole') + 販売 (はんばい, 'sales') + 代理 (だいり, 'agency') + 権 (けん, 'right').