11世紀に入ると、官司請負制が成立し、中央官司の業務が特定の氏族によって担われるようになった。

In the eleventh century, the government office contract system was established and central government official jobs were held by certain clans. - Wikipedia日英京都関連文書対訳コーパス

応仁の乱後、堺商人が抽分銭の請負業務を行い、出航前に予め輸入品の利益額を想定して抽分銭を先に経営者側に納付する制度を取った。

After the Onin War, Sakai merchants undertook the task of Chubunsen under a system in which they prepaid the Chubunsen to the management based on the amount of profit to be generated from imported goods that was preliminarily estimated by them in advance of departure. - Wikipedia日英京都関連文書対訳コーパス

天文(日本)8年（1539年）に天文法華の乱の影響による土倉役・酒屋役の減少への対策として管領細川晴元が明徳以来度々納銭方や公方御倉を務めた延暦寺系の土倉｢正実坊｣による納銭方業務の請負一任（事実上の独占化）が決定されると、土倉や酒屋がこれに強く反対して幕府への直納（直進）要求するに至った。

When Kanrei (shogunal deputy) Harumoto HOSOKAWA decided in 1539 to leave the monopolistic contract for the Nosenkata business entirely to 'Shojitsubo' (a doso of Enryaku-ji Temple extraction), which had repeatedly taken charge of Nosenkata and Kubo-okura, as a measure against the dosoyaku and sakayayaku decrease due to the damage from the Tenbun Hokke War, the doso and sakaya strongly opposed his decision and requested direct tax payment to the bakufu. - Wikipedia日英京都関連文書対訳コーパス