Japan · Procurement Portal award records · Supplier record

Koyama Co., Ltd.

小山株式会社

Line: Cleaning and janitorial services (UNSPSC 76110000)Register loaded to September 2026Compiled 12 October 2026

Koyama Co., Ltd. — Japan · Procurement Portal award records · Supplier record: 10 award notices, all years (Apr 2017 – Feb 2026); 5 since January 2024 (3 buyers); 302nd rank in the line (of 649 suppliers · 0.1%); 20 buyers never served (1,759 notices in the line from them).

Assay record ASY-JP-1URE05Q1FC · Cite as: Assay Systems, “Koyama Co., Ltd. in the Procurement Portal register for Japan”, https://assay-systems.com/register/jp/koyama-co-ltd/

10
award notices, all years
Apr 2017 – Feb 2026
5
since January 2024
3 buyers
302nd
rank in the line
of 649 suppliers · 0.1%
20
buyers never served
1,759 notices in the line from them

Own record by year

award notices, 2014 onward
2
1
2
1
2
2
2014201520162017201820192020202120222023202420252026

Who buys from Koyama Co., Ltd.

since January 2024
3buyers
5notices
40%top buyer
Ministry of Defense40.0%
2 notices
Ministry of Land, Infrastructure, Transport and Tourism40.0%
2 notices
Supreme Court of Japan20.0%
1 notice

1 buyer named Koyama Co., Ltd. before 2024 only.

The line

since January 2024
3,113award notices
24buyers
649suppliers
26.8%held by top ten

Cleaning and janitorial services (UNSPSC 76110000)

1,076
1,053
984
202420252026Jan–Sep
302ndof 649 suppliers
2notices name Koyama Co., Ltd.
0.1%share of the line
0.1%of 866 notices from Ministry of Land, Infrastructure, Transport and Tourism
0.8%of 124 notices from Supreme Court of Japan
120new suppliers since 2024

Buyers that buy the line and never named Koyama Co., Ltd.

since April 2014
20buyers
1,759notices since 2024
13buyers took a new supplier
142suppliers came in that way
Ministry of Health, Labour and Welfare
356 notices
Ministry of Finance
304 notices
Forestry Agency
301 notices
National Tax Agency
269 notices
Public Prosecutors Office
158 notices
Ministry of Agriculture, Forestry and Fisheries
88 notices
Japan Coast Guard
56 notices
Cabinet Office
37 notices
Ministry of the Environment
36 notices
Japan Meteorological Agency
35 notices
House of Representatives
23 notices
National Police Agency
22 notices
Ministry of Internal Affairs and Communications
21 notices
Imperial Household Agency
20 notices
Cabinet Secretariat
10 notices
Ministry of Education, Culture, Sports, Science and Technology
9 notices
Ministry of Economy, Trade and Industry
8 notices
Central Labour Relations Commission
3 notices
National Personnel Authority
2 notices
House of Councillors
1 notice

Suppliers next to it in the line

since January 2024
Aibikkusu Co., Ltd.1 buyer
2 notices
Akatsuki Co., Ltd., Osaka1 buyer
2 notices
Aku Project Co., Ltd.1 buyer
2 notices
Koyama Co., Ltd.
2 notices

All 649 suppliers in the line

The extract

Every buyer, every supplier, award date, notice number and value where one is disclosed, behind the figures above.

Request extract

Source: successful bid records (open data) for Japan in the Procurement Portal of the Government of Japan, Digital Agency, p-portal.go.jp, which permits reuse including commercial use under its terms of use; awards from April 2014 to 30 September 2026, accessed 12 October 2026.Assay Systems has changed the data.