noun
black-market channels; illegal channels
Refers to distribution or procurement routes that operate outside legal or official systems, often for controlled goods, tickets, or information.
人気の限定品が闇ルートで高額取引されている。
Popular limited-edition items are being traded at high prices through black-market channels.
彼は闇ルートを使って入手したチケットを転売していた
He was reselling tickets he had obtained through illegal channels.