NTT Security (Japan) K.K.

What NTT Security (Japan) K.K. does

NTT Security (Japan) K.K., operating under the trade name NTT Security Holdings, is the core cybersecurity function of NTT Group and a wholly-owned subsidiary of NTT Corporation. The company provides threat intelligence analysis, security consulting, managed security services, and incident response on a 24/7/365 basis to enterprise customers, with particular focus on organizations implementing AI adoption and digital transformation initiatives. Its operations span two regional operating companies, one based in Tokyo, Japan and another based in Mölndal, Sweden, serving customers across Asia and Europe.

The company's service portfolio is anchored by the Global Threat Intelligence Center, a dedicated threat analysis and research facility, and Proactive Cyber Defense Services, which combines that intelligence with cloud-native solutions and skilled security talent to detect threats early, identify risks that bypass existing controls, and establish cyber resilience. Supporting offerings include Managed Security Services for continuous monitoring, Incident Response for breach containment, and Consulting Services for risk-based security strategy development. The integrated platform architecture is positioned as a unified cybersecurity capability rather than a set of standalone products.

Commercially, NTT Security (Japan) K.K. operates a direct B2B enterprise sales motion with regional delivery through its Japan and Nordics/Europe entities. Pricing is not publicly disclosed. The company's go-to-market leverage comes from its position within NTT Group's broader digital infrastructure and AI/DX promotion initiatives, which provide cross-sell channels into NTT Group's enterprise customer base. Leadership includes a CEO who concurrently serves as Chief Information Security Officer for the entire NTT Group, underscoring the unit's strategic centrality to the parent conglomerate.

Name

NTT Security (Japan) K.K.

Legal name

NTTセキュリティホールディングス株式会社

Website

https://nttsecurity.com

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

NTT Security (Japan) K.K., the core cybersecurity subsidiary of NTT Group, delivers Global Threat Intelligence, Managed Security Services, Incident Response, and Consulting to enterprise customers pursuing AI and digital transformation, operating across Japan and Europe.

Ownership category

akta.pro rank

Product category

Cybersecurity Services

NAICS

Security Systems Services (except Locksmiths) (561621), Computer Facilities Management Services (541513)

SIC

Services-Computer Integrated Systems Design (7373)

akta.pro primary industry

Cyber Defense & Information Security (National Security) (BPAIAHAE)

Keywords

• Managed security services
• Threat intelligence
• Incident response
• Cybersecurity consulting
• Cyber risk management

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure

Core offering

NTT Security (Japan) K.K. provides enterprise cybersecurity services, including 24/7 managed security monitoring, threat intelligence through its Global Threat Intelligence Center, incident response, and security consulting. The firm helps organizations mitigate cyber risk during digital transformation and AI adoption by combining NTT Group's internal self-defense experience with proactive cyber defense capabilities.

Product overview

NTT Security (Japan) K.K. operates as NTT Group's core cybersecurity company, offering a unified platform of security services rather than discrete standalone products. The portfolio centers on Proactive Cyber Defense Services, which integrates the Global Threat Intelligence Center's advanced threat analysis with Managed Security Services, Incident Response, and Consulting Services. This integrated approach enables customers to achieve rapid cyber resilience through cloud-native solutions while receiving 24/7 protection. The company leverages NTT's internally developed expertise and knowledge accumulated through years of self-defense operations to deliver enterprise-grade security services.

Differentiator

Problem solved

Functional benefit

Products and services

• Proactive Cyber Defense Services A managed service offering proactive cyber defense capabilities that combine continuous monitoring, threat detection, and rapid response to protect enterprises against advanced threats.
• Managed Security Services 24/7 outsourced management of security operations for enterprise customers, covering monitoring, detection, and remediation of cyber threats.
• Global Threat Intelligence Center A global threat intelligence service that aggregates and analyzes cyber threat data to provide enterprises with actionable intelligence on emerging threats.
• Incident Response Services Reactive and emergency services to help organizations contain, investigate, and remediate cybersecurity incidents and breaches.
• Security Consulting Services Advisory and consulting engagements that help enterprises assess cyber risk, design security architectures, and build cyber defense capabilities during digital transformation and AI adoption.

Segments1 record

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

One partnership is on record.

• NTT Group (NTT株式会社)coreStrategic or Co-development PartnerNTT Security Holdings serves as the core cybersecurity function of NTT Group. The company leverages NTT's internal self-defense experience and knowledge to provide security services to customers. NTT Group companies collaborate on AI promotion and DX promotion integrated security services. Parent company NTT Corporation holds 100% shareholding.

Scale indicators2 records

Recent moves4 records

Expansion highlights4 records

Broad incumbents

• Booz Allen Hamilton: Large consulting firm with deep federal and enterprise cybersecurity practices, including threat intelligence and managed defense. Comparable for government-adjacent and large-enterprise cyber mandates NTT Security pursues.
• Capgemini (cybersecurity services): Global IT and consulting firm with a dedicated cybersecurity practice covering managed SOC, identity, and cloud security. Comparable end-to-end service portfolio and enterprise target customer base.
• IBM Security: Broad incumbent with managed security services, threat intelligence (X-Force), and consulting worldwide. Competes with NTT Security for large enterprise SOC and incident response deals across Japan, Europe, and globally.
• Atos (cybersecurity division): European-headquartered IT services firm with managed security, SOC, and identity services across EMEA. Closest large incumbent competing with NTT Security in the European Nordics market where NTT has its Mölndal hub.
• Deloitte (Cyber Risk Services): Big Four advisory firm with extensive managed security, incident response, and cyber consulting capabilities. Frequently competes for the same enterprise transformation security engagements NTT Security targets.
• Accenture Security: Global consulting giant with a large dedicated security practice spanning managed services, incident response, and strategy consulting. Overlaps with NTT Security's full-stack service portfolio at the enterprise tier.

Regional players

• Trend Micro: Japan-headquartered global cybersecurity vendor with strong threat intelligence, MDR, and managed security services. Direct regional peer competing for the same Japanese enterprise and government security budgets.

Direct peers

• Mandiant (Google Cloud): Specialist in incident response, threat intelligence, and managed detection, now part of Google Cloud. Closest functional peer to NTT Security's incident response and Global Threat Intelligence Center capabilities.
• Secureworks: Pure-play MDR and managed security services provider with global SOC operations. Directly comparable business model to NTT Security's managed security services and threat intelligence offerings.
• NTT DATA: IT services arm of NTT Group with a significant cybersecurity practice serving enterprise and government clients globally. Most direct comparable within the same parent ecosystem, often bidding against or alongside NTT Security on overlapping mandates.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/ntt-security-japan-kk

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about NTT Security (Japan) K.K.