Company lists · Data refreshed November 2026

Top 23 Cybersecurity consultancies based in Japan

Name: Cybersecurity consultancies based in Japan
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 179 companies tracked

RevenueBase identified 179 company matches for cybersecurity consultancies associated with Japan as of November 2026 and tracks 5,572 professional contacts across them, including 1,720 with verified work emails. Jing is the largest hub.

This list covers company matches for cybersecurity consultancies 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

179Companies

5,572Contacts tracked

1,720Verified emails

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The 23 largest cybersecurity consultancies based in Japan

Ranked by team size

Top 23 of 179 company matches for cybersecurity consultancies 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Trend Micro	Exact match	Yoyogi, JapanHQ recorded Nov 6, 2026	5,001-10,000	2,797 contacts →
	Exact match “We’re a global cybersecurity leader, helping to make the world safe for exchanging digital information.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Hennge	Exact match	渋谷区, JapanHQ recorded Nov 6, 2026	201-500	290 contacts →
	Exact match “HENNGE is Japan’s leading cloud security provider.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Vicone	Exact match	Tokyo, JapanHQ recorded Nov 6, 2026	51-200	89 contacts →
	Exact match “VicOne, headquartered in Tokyo, Japan, is a cybersecurity leader for Physical AI, built on proven automotive cybersecurity expertise.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Gmoサイバーセキュリティ Byイエラエ株式会社	Exact match	渋谷区, JapanHQ recorded Nov 6, 2026	51-200	65 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	NEC Technologies	Exact match	Tokyo, JapanHQ recorded Nov 6, 2026	n/a	63 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	GMO Flatt Security INC	Exact match	渋谷区, JapanHQ recorded Nov 6, 2026	n/a	38 contacts →
	Exact match “GMO Flatt Security, based in Tokyo, offers expert security assessments and penetration testing for software.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Tokyo Techies	Exact match	Tokyo, JapanHQ recorded Nov 6, 2026	11-50	38 contacts →
	Exact match “Based in Tokyo, Japan, Tokyo Techies is a one-stop IT consulting firm that provides clients with innovative solutions to all their business problems through digital transformation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Lrm株式会社	Exact match	神戸市中央区, JapanHQ recorded Nov 6, 2026	51-200	31 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	エムオーテックス(株)	Exact match	大阪市　淀川区, JapanHQ recorded Nov 6, 2026	51-200	29 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	株式会社ブロードバンドセキュリティ	Exact match	新宿区, JapanHQ recorded Nov 6, 2026	51-200	27 contacts →
	Exact match “1.()\t2.\t3.()” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Alphanet	Exact match	文京区, JapanHQ recorded Nov 6, 2026	201-500	26 contacts →
	Exact match “4 50820128 : 1-5-3 03-5800-4311 1100 ↓” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	日本プルーフポイント株式会社	Exact match	港区, JapanHQ recorded Nov 6, 2026	11-50	24 contacts →
	Exact match “Proofpoint, Inc.NASDAQ:PFPT Proofpoint Fortune” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	E-Guardian INC	Exact match	1-2-8 Toranomon, JapanHQ recorded Nov 6, 2026	1,001-5,000	21 contacts →
	Exact match “E-guardian is a "Comprehensive Internet Security Company" that provide a one-stop solution to all your internet security needs through: Post Monitoring, Customer Support…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	EPI Executive Protection, INC	Exact match	港区, JapanHQ recorded Nov 6, 2026	501-1,000	20 contacts →
	Exact match “Protecting What Matters Most." Founded in 2004, Executive Protection, Inc.(EPI) is a licensed and insured security firm headquartered in Tokyo, Japan.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	NTT Security Japan K.K	Exact match	Tokyo, JapanHQ recorded Nov 6, 2026	201-500	19 contacts →
	Exact match “Protecting the Digital Future with Advanced Threat Detection At NTT Security (Japan) K.K, we specialize in cutting-edge cyber threat detection and response, helping businesses…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	AKB Limited	Exact match	Tokyo, JapanHQ recorded Nov 6, 2026	1-10	19 contacts →
	Exact match “With 25 years of expertise in IT services across Japan, particularly in the retail and hospitality sectors, AKB is dedicated to delivering top-tier cybersecurity and cloud…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Cyber Defense Institute, INC	Exact match	千代田区, JapanHQ recorded Nov 6, 2026	51-200	18 contacts →
	Exact match “Only humans can counter human-driven threat.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Seciron	Exact match	Tokyo, JapanHQ recorded Nov 6, 2026	51-200	18 contacts →
	Exact match “SecIron secures mobile apps against the attacks like cloning, repackaging, reverse engineering and runtime tampering, on devices you don't control.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	グローバルセキュリティエキスパート(株)	Exact match	港区, JapanHQ recorded Nov 6, 2026	51-200	18 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	アルプスシステムインテグレーション(株)	Exact match	大田区, JapanHQ recorded Nov 6, 2026	201-500	17 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Ricerca Security, INC	Exact match	Chiyoda-ku, JapanHQ recorded Nov 6, 2026	11-50	16 contacts →
	Exact match “R&d \| 500 \| ctf” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Caulis	Exact match	Tokyo, JapanHQ recorded Nov 6, 2026	11-50	15 contacts →
	Exact match “Caulis is a cybersecurity startup which is building the open security platform for every single device.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	NTT Security Holdings	Exact match	Chiyoda-ku, JapanHQ recorded Nov 6, 2026	501-1,000	14 contacts →
	Exact match “For over 20 years, NTT has provided proactive cyber defense and services that make use of gathered human resources and intelligence to protect our clients, our society and the…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “cybersecurity consultancies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 23 of 179 cybersecurity consultancies based in Japan

See the full list, filter by size, metro and specialty, and access 1,720 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cybersecurity consultancies based in Japan at a glance

As of Nov 6, 2026

30.9%Verified-email coverage

31.1Average contacts per company

11-50Median size (employees)

19.0%Largest-city concentration · Jing

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 179 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 “cybersecurity consultancies” 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 1,720 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.

Cybersecurity consultancies by metro

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 “cybersecurity consultancies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity consultancies are there based in Japan?

RevenueBase identified 179 company matches for cybersecurity consultancies 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?

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

Which city has the most cybersecurity consultancies?

Jing leads with 34 company records, followed by Tokyo (25) and Minato (3).

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 1,720 professional contacts with verified work emails tracked across these 179 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.