In the typology of police corruption, a common assumption is that officials abuse their position to systematically extort money or favours. This chapter challenges this assumption. This investigation focuses on senior police officers. The Tokyo Metropolitan Police Bureau was a law enforcement agency that served the city of Tokyo. The customary gifts had been given by two businessmen operating within the legal sex industry. The purpose of the gift was to express gratitude for police officers’ mediation in dispute resolution for maintaining peace and public order in the red-light district. The appellant, a sex businessman, asserted to Taishinin that the mediation conducted by law enforcement officials was undertaken in a private capacity and exceeded the scope of their official duties as delineated by law. In the absence of evidence demonstrating that police officers intended to mediate for personal gain, their subsequent acceptance of the appellant’s gifts should be considered lawful. Taishinin dismissed appeal on the grounds that police officers are tasked with maintaining public peace and order. Consequently, any actions undertaken to fulfil this mission, including private mediation, should be considered part of their official duties. All police officers were expected to be on duty at all times to achieve the objectives outlined in this mission and in Article 9 of the Meiji Constitution. This chapter also provides a comprehensive examination of the legal precedent established by Taishinin’s contract law ruling, which effectively legitimized the supply chain of sex workers within the sex industry.