1. Administrative Evaluation Bureau (AEB), 2008. Administrative Evaluation and Audit Report on the Proper Execution of Contracts. 〈https://www.soumu.go.jp/main_content/000254165.pdf〉. (Accessed June 28, 2021).
2. Administrative Reform Council (ARC), 2020. Results of inspection of procurement improvement in fiscal year 2019. 〈https://www.gyoukaku.go.jp/chotatsu/H31kaizen/R01-honbun.pdf〉. (Accessed June 22, 2021).
3. Construction industry and competition policy in Japan;Arai;Int. J. Econ. Bus.,2017
4. Kokyo keiyaku no kyososei kakuho to issha-osatsu mondai [Ensuring competitiveness in public contract and one-party bid problem];Arikawa;Kaikei Kensa Shiryo,2016
5. Regulatory capture in public procurement: evidence from revolving door bureaucrats in Japan;Asai;J. Econ. Behav. Organ.,2021