The Government Procurement Review Board
- a report (3,October 2000)(Japanese) (PDF: 65 KB)
- a report (21 December 2001)(Japanese) (PDF: 65 KB)
- a report (8 July 2002)(Japanese) (PDF: 55 KB)
- a report (20 January 2006)(Japanese) (PDF: 94 KB)
- a report (25 December 2008)(Japanese) (PDF: 252 KB)
- a report (7 September 2010)(Japanese) (PDF: 250 KB)
- a report (28 June 2011)(Japanese) (PDF: 175 KB)
- a report (24 April 2012)(Japanese) (PDF: 198 KB)
- a report (17 January 2013)(Japanese) (PDF: 371 KB)
- a report (10 October 2014) (Japanese)(PDF: 481 KB)
- a report (30 September 2014)(Japanese) (PDF: 481 KB)
- a report (8 June 2018)(Japanese) (PDF: 399 KB)
- a report (12 March 2020)(Japanese) (PDF: 490 KB)
- a report (22 December 2023)(Japanese) (PDF: 513 KB)
- a report (23 August 2024)(Japanese) (PDF: 531 KB)