Company lists · Data refreshed November 2026

Top 22 IT infrastructure contractors based in Japan

RevenueBase identified 138 company matches for IT infrastructure contractors associated with Japan as of November 2026 and tracks 8,245 professional contacts across them, including 1,431 with verified work emails. Jing is the largest hub.

This list covers company matches for IT infrastructure contractors associated with Japan, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
138Companies
8,245Contacts tracked
1,431Verified emails
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The 22 largest IT infrastructure contractors based in Japan

Ranked by team size
Top 22 of 138 company matches for IT infrastructure contractors based in Japan, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchChiyoda-ku, JapanHQ recorded Nov 6, 202610001+4,872 contacts →

Exact match

“NTT is a leading global technology innovator, providing a broad range of services to both consumers and businesses.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact match川崎市中原区, JapanHQ recorded Nov 6, 20265,001-10,000754 contacts →

Exact match

“is a facilities services company based out of Japan.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchTokyo, JapanHQ recorded Nov 6, 202610001+598 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact match渋谷区, JapanHQ recorded Nov 6, 202651-20027 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact match横浜市 港北区, JapanHQ recorded Nov 6, 202651-2009 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchKoto, JapanHQ recorded Nov 6, 202611-508 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact match港区, JapanHQ recorded Nov 6, 202651-2007 contacts →

Exact match

“IT\tWEBWEB\t\t\t\t\t\t\t”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchChiyoda-ku, JapanHQ recorded Nov 6, 20261-106 contacts →

Exact match

“Provide high-level IT infrastructure consulting, integration, and training lead by first and only 8xCCIE/CCDE in the world!”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact match港区, JapanHQ recorded Nov 6, 2026n/a6 contacts →

Exact match

“IT\t\t Microsoft, Network, Oracle, ERP”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchTokyo, JapanHQ recorded Nov 6, 202611-505 contacts →

Exact match

“Wintech Solutions Welcome to Wintech Solutions!”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchMeguro, JapanHQ recorded Nov 6, 202611-505 contacts →

Exact match

“ComnetSystem is a company that provides comprehensive ICT infrastructure solutions to businesses.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchTokyo, JapanHQ recorded Nov 6, 20261-105 contacts →

Exact match

“Android Systems, Inc.(ASI) is a provider of professional IT services in Tokyo and other locations throughout Japan.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchJapanHQ recorded Nov 6, 202651-2004 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact match江東区, JapanHQ recorded Nov 6, 20261-104 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact match中央区, JapanHQ recorded Nov 6, 202651-2003 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact match名古屋市 中区, JapanHQ recorded Nov 6, 202611-503 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact match文京区, JapanHQ recorded Nov 6, 20261-103 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchTokyo, JapanHQ recorded Nov 6, 202611-502 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact match宇部市, JapanHQ recorded Nov 6, 202611-502 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchShibuya-ku, JapanHQ recorded Nov 6, 20261-101 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchTokyo, JapanHQ recorded Nov 6, 20261-101 contacts →

Exact match

“InfoPocket provides the very best in IT Infrastructure Projects and Professional Web Site Design and Development services to the greater Tokyo area and throughout Japan.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchTokyo, JapanHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Works we can do are below.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 22 of 138 IT infrastructure contractors based in Japan

See the full list, filter by size, metro and specialty, and access 1,431 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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IT infrastructure contractors based in Japan at a glance

As of Nov 6, 2026
17.4%Verified-email coverage
59.7Average contacts per company
51-200Median size (employees)
15.2%Largest-city concentration · Jing
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
30
11-50
27
51-200
35
201-500
23
501-1,000
6
1,001-5,000
8
5,001-10,000
1
10001+
2

Email recency for this list is measured worldwide rather than for Japan, so it is reported there. Company counts and contact totals on this page are exact for Japan, over 138 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Japan whose business descriptions match “IT infrastructure contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 1,431 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “IT infrastructure contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many IT infrastructure contractors are there based in Japan?

RevenueBase identified 138 company matches for IT infrastructure contractors associated with Japan as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

NTT tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most IT infrastructure contractors?

Jing leads with 21 company records, followed by Tokyo (11) and Xian (8).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,431 professional contacts with verified work emails tracked across these 138 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.