Conversion

What Conversion does

Conversion Co., Ltd. (株式会社コンバージョン) is a Japanese IT professional services firm founded in 2002 by CEO Naoto Hiramachi (外池 直人) and headquartered in the Minatomirai district of Yokohama, Kanagawa. With 11–50 employees operating primarily under remote-work arrangements, the company specializes in open-source software (OSS) lifecycle services — covering design, construction, operation, and maintenance of systems built on Nextcloud, ownCloud, Docker, OTRS, Sympa, PostgreSQL/MySQL/MariaDB, Apache, nginx, Sophos security products (Intercept X, Firewall XGS), Prometheus, Grafana, and Microsoft 365. Complementary service lines include security product implementation and support, system security diagnosis and hardening, telework consulting, and DRBD-based high-availability storage construction.

The company derives revenue entirely from quote-based professional services engagements sold on a direct, no-intermediary basis to enterprise and mid-market clients in Japan. There is no disclosed pricing, no subscription or productized offering, and no public customer list beyond one named implementation engagement (Get It Co., Ltd. for Pleasanter). Customer acquisition is driven primarily by a technical blog (tecblog) and partner-event participation. In 2025 the company acquired ISMS certification, joined the D&I Kanagawa Members initiative, and formalized a partnership with Imprim Co., Ltd. for the Pleasanter business-process platform, earning the Pleasanter Partner Award 2025. Conversion operates exclusively within Japan with no disclosed international footprint, no external funding, no M&A history, and full founder independence.

Conversion Co., Ltd. is a Japanese OSS professional services firm (11–50 employees, Yokohama, founded 2002) delivering implementation, support, and security services around Nextcloud, Docker, OTRS, Sophos, Prometheus/Grafana, and related open-source stacks to enterprise and mid-market clients in Japan on a quote-based, direct-engagement basis.

Name

Conversion

Legal name

株式会社コンバージョン

Website

https://conversion.co.jp

Company type

Private

Founded year

2002

Operating status

Operating

Headcount range

11–50 employees

Short description

Conversion Co., Ltd. is a Japanese OSS professional services firm (11–50 employees, Yokohama, founded 2002) delivering implementation, support, and security services around Nextcloud, Docker, OTRS, Sophos, Prometheus/Grafana, and related open-source stacks to enterprise and mid-market clients in Japan on a quote-based, direct-engagement basis.

Ownership category

akta.pro rank

Product category

IT Infrastructure Services

NAICS

Computer Systems Design and Related Services (5415), Custom Computer Programming Services (541511)

SIC

Services-Computer Integrated Systems Design (7373), Services-Computer Programming Services (7371)

akta.pro primary industry

Enterprise Application Modernization & Upgrades (incl. S/4HANA, cloud migrations) (BPAEAGAG)

Keywords

• Open source software services
• OSS implementation support
• IT infrastructure consulting
• Network security services
• Remote work consulting

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. OSS Implementation Services: Design, construction, and operational support for OSS systems - covering the entire lifecycle from planning to ongoing maintenance.
2. OSS Maintenance Support Services: Ongoing support services covering OSS usage questions, troubleshooting, and operational issues for Web/mail/DB/LDAP systems.
3. Security Product Services: Security product implementation, support, and system security diagnosis/enhancement services.
4. Telework Consulting: Consulting services addressing various barriers and challenges related to remote work arrangements.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Conversion provides professional services for the design, construction, and ongoing operation/maintenance of Open Source Software (OSS) systems, including Nextcloud, ownCloud, Docker, OTRS, Sympa, Prometheus/Grafana, and database/web/mail stacks. The company also delivers security product implementation and support (Sophos), system security diagnosis and hardening, DRBD-based high-availability storage, and telework (remote work) consulting for Japanese enterprise and mid-market clients.

Product overview

Conversion (株式会社コンバージョン) is an IT services company offering professional services centered around Open Source Software (OSS). The company provides two primary service categories: OSS Implementation and Support Services covering design, construction, and maintenance of OSS systems; and Security Products Services covering implementation and support of enterprise security solutions. Key supported OSS products include Nextcloud (online storage), ownCloud (file sharing predecessor), Grafana (data visualization), Prometheus (monitoring), OTRS (help desk/CRM), Docker (containerization), and Sympa (mailing lists). The company also provides specialized services for DRBD (high availability storage), telework consulting, and system security assessment. Founded in 2002 and headquartered in Yokohama, Kanagawa, Japan.

Differentiator

Problem solved

Functional benefit

Products and services

• OSS Implementation Support Service (OSS導入支援サービス) End-to-end professional services covering the design, construction, and operational maintenance of Open Source Software systems (Web, mail, DB, LDAP, file storage) for Japanese enterprise and mid-market clients.
• OSS Maintenance Support Service (OSS保守サポートサービス) Ongoing technical support for OSS environments, including usage inquiries, troubleshooting, and operational issue handling for Web/email/DB/LDAP systems.
• Telework Consulting (テレワークコンサル) Consulting services that address barriers and challenges of remote work arrangements, drawing on Conversion's extensive OSS and IT infrastructure experience to deliver tailored solutions.
• Security Product Implementation Support Service (セキュリティ製品構築支援サービス) Setup, deployment, and integration support for enterprise security solutions such as Sophos Intercept X endpoint protection and Sophos Firewall XGS.
• Security Product Support Service (セキュリティ製品サポートサービス) Ongoing support and maintenance for deployed security products, covering endpoint protection, firewall operations, and cloud security management.
• System Security Diagnosis and Strengthening Service (システムセキュリティ診断・強化サービス) Server and system security assessments to identify vulnerabilities and implement remediation and hardening measures.
• DRBD Construction Support Service (DRBD構築支援サービス) Design and deployment support for DRBD (Distributed Replicated Block Device) high-availability storage solutions.

Named customers1 record

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

Feature5 records

Partnerships

One partnership is on record.

• 株式会社インプリム (Imprim Co., Ltd.)coreTechnology or Integration · 17 December 2025Imprim provides Pleasanter (プリザンター), a business management platform. Conversion provides implementation and support services for Pleasanter. The partnership was formalized through participation in Imprim Partner Meetings where strategies and case studies are shared among partner companies.

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Market position

Strengths4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/conversioncojp

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Conversion