Adresses 45% open

Each Ministry publishes their tender on their own webpage. In those webpages, all the required information are included. 衆議院 /House of Representatives https://www.shugiin.go.jp/internet/itdb_annai.nsf/html/statics/choutatsu/chotatsujoho.htm 参議院 /House of Councillors https://www.sangiin.go.jp/japanese/annai/choutatu/21buppin-ekimu/21seifuchoutatu.html https://www.sangiin.go.jp/japanese/annai/choutatu/index.html 最高裁判所 /Supreme Court https://www.courts.go.jp/tyotatu/ 会計検査院 /Board of Audit of Japan https://www.jbaudit.go.jp/proc/info/index.html 内閣 /Cabinet https://www.cao.go.jp/chotatsu/geps_link/geps_link.html#kanbou 人事院 /National Personnel Authority https://www.jinji.go.jp/tyoutatu/index14.4.1.htm 内閣府 /Cabinet Office https://www.cao.go.jp/chotatsu/ 宮内庁 /Imperial Household Agency https://www.kunaicho.go.jp/kunaicho/chotatsu/chotatsu.html 国家公安委員会（警察庁） /National Public Safety Commission https://www.npa.go.jp/chotatu/chotatsu/newmainmenu2.htm 防衛省 /Ministry of Defence https://www.mod.go.jp/nda/procurement/information.html 総務省 /Ministry of Internal Affairs and Communications https://www.geps.go.jp/ 法務省 /Ministry of Justice https://www.moj.go.jp/chotatsu_index.html 外務省 /Ministry of Foreign Affairs https://www.mofa.go.jp/mofaj/annai/shocho/chotatsu/ 財務省 /Ministry of Finance https://www.mof.go.jp/procurement/ 文部科学省 /Ministry of Education, Culture, Sports, Science and Technology https://www-gpo3.mext.go.jp/kanpo/gpoindex.asp 厚生労働省 /Ministry of Health, Labour and Welfare https://www.mhlw.go.jp/shinsei_boshu/choutatsujouhou/ 農林水産省 /Ministry of Agriculture, Forestry and Fisheries https://www.maff.go.jp/j/supply/ 経済産業省 /Ministry of Economy, Trade and Industry https://www.meti.go.jp/information_2/publicoffer/00_bid_news_list.html 国土交通省 /Ministry of Land, Infrastructure, Transport and Tourism https://www.i-ppi.jp/Search/Web/Index.htm 国税庁　/National Tax Agency https://www.data.go.jp/data/dataset/mof_20160325_0048/resource/eaab1567-4c3d-48aa-a5aa-52b8af6eaeae

The first resource listed shows the tender data in PDF with minimum information for each of the ministries. The second database has only basic information in HTML. Going into the resources for each of the ministries the complete info can be found but only seen in HTML form.