What アノテーション株式会社 does

Classmethod Operations K.K. (クラスメソッドオペレーションズ株式会社), formerly Annotation K.K. (アノテーション株式会社), is a Tokyo-headquartered Japanese B2B cloud and managed services provider that operates as a wholly-owned subsidiary of Classmethod K.K. Founded on 2011-07-07 with JPY 20 million in capital and rebranded on 2026-01-16, the company employs 193 people (as of 2025-09-01) and runs eight offices across Japan spanning Sapporo, Sendai, Joetsu, Nagoya, Osaka, Fukuoka, and Okinawa in addition to its Hibiya headquarters.

Its core offering centers on AWS cloud operations and managed services delivered through three principal service lines: partner-style cloud operations support (伴走型クラウド運用支援サービス), AWS delegated operations (AWS運用代行サービス), and Jamf implementation support for Apple device management. These are complemented by data analytics infrastructure consulting, application planning/design/development and maintenance, IT infrastructure consulting, and back-office IT/AI consulting focused on paperless, automation, telework, and AI-driven process transformation (AX). Underlying technology is AWS-centric cloud infrastructure management layered with an internally codified 'Operation Excellence Framework' (オペレーション・エクセレンス) that systematizes engineering and back-office workflows to eliminate individual dependency and standardize quality.

The business operates a sales-led B2B model targeting enterprise and mid-market Japanese companies, generating revenue from a mix of recurring managed services and project-based professional services, with quote-based non-public pricing. The company maintains ISO/IEC 27001:2022, ISO/IEC 27017:2015, ISO/IEC 20000-1:2018, and COPC CX (obtained 2026-06-12) certifications. As part of the broader Classmethod Group — which spans Prismatix, NextMode, Propagate, Cybermatrix, and Classmethod Technologies domestically and entities in Germany, Canada, Thailand, Korea, Vietnam, and Malaysia internationally — it can mobilize group-wide technical resources for larger managed operations engagements.

Name

アノテーション株式会社

Legal name

クラスメソッドオペレーションズ株式会社

Website

https://an.classmethod.jp

Company type

Private

Founded year

2011

Operating status

Operating

Headcount range

11–50 employees

Short description

Classmethod Operations K.K. (formerly Annotation K.K.) is a Tokyo-based Japanese B2B cloud and managed services subsidiary of Classmethod Group providing AWS cloud operations, data analytics, application development, Jamf deployment, and AI-driven business transformation to enterprise and mid-market customers across Japan.

Ownership category

akta.pro rank

Product category

Cloud Managed Services

NAICS

Computer Facilities Management Services (541513), Custom Computer Programming Services (541511)

SIC

Services-Computer Programming, Data Processing, Etc. (7370), Services-Computer Programming Services (7371)

akta.pro primary industry

Cloud-Native Development (Containers, Kubernetes, Microservices) (BPAEACAD)

akta.pro secondary industries

Server Management, Orchestration & BMC/Remote Admin Systems (HDACABAK), Cloud & Infrastructure Support (Servers, Storage, Virtualization) (BPAAACAE)

Keywords

• Cloud managed services
• AWS operations
• IT infrastructure consulting
• Data analytics platform
• Back-office AI transformation

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices8 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Managed Cloud Operations Services: Ongoing cloud infrastructure management and operations services including AWS operations, cloud support services, providing recurring revenue from enterprise clients.
2. Technical Consulting and Implementation: Technical consulting, design, and construction services for cloud infrastructure, data analytics platforms, and applications.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Classmethod Operations K.K. provides ongoing AWS cloud infrastructure operations, cloud consulting/design/build support, data analytics platform development, application design and maintenance, IT infrastructure consulting, and AI-powered back-office digitalization services for enterprise and mid-market clients in Japan. Services are delivered through managed service engagements and technical consulting under a systematized operational framework certified to ISO 27001, ISO 27017, ISO 20000-1, and COPC CX standards.

Product overview

アノテーション株式会社 (now クラスメソッドオペレーションズ株式会社) offers a unified platform of IT services centered on cloud operations excellence. The core portfolio comprises three main services: 伴走型クラウド運用支援サービス (partner-type cloud support), AWS運用代行サービス (AWS delegated operations), and Jamf 導入サポート (Jamf implementation). These are complemented by data analysis infrastructure services, application development and maintenance, IT infrastructure consulting, and AI-powered back-office automation services. The company positions itself as a strategic operations partner focused on operational excellence, combining AI-driven process transformation with high-quality managed services.

Differentiator

Problem solved

Functional benefit

Products and services

• Partner-type Cloud Operations Support Service (伴走型クラウド運用支援サービス) Partner-type cloud operations support service providing ongoing technical consulting, design, construction, operation, and maintenance for AWS and other cloud infrastructure for enterprise and mid-market clients in Japan.
• AWS Delegated Operations Service (AWS運用代行サービス) Full-lifecycle AWS cloud infrastructure operations service covering technical consulting, design, construction, operation, and maintenance on behalf of the customer.
• Jamf Implementation Support (Jamf導入サポート) Implementation and ongoing support for the Jamf Apple device management platform, helping enterprise customers deploy and manage Apple devices at scale.
• Data Analytics Infrastructure Service (データ分析基盤サービス) Technical consulting, design, development, operation, and maintenance of data analysis infrastructure platforms for enterprise customers.
• Application Design, Development, Operation & Maintenance (アプリケーション企画設計開発・運用保守) End-to-end application planning, design, development, operation, and maintenance services for enterprise customers.
• IT Infrastructure Technical Consulting, Design, Build, Operation & Support (ITインフラ技術コンサルティング・設計構築・運用・サポート) IT infrastructure technical consulting, design, construction, operation, maintenance, and support services for enterprise customers.
• Back-Office IT/AI Utilization Service (バックオフィス業務(IT/AI活用)サービス) Consulting, design, operation, and support for back-office digitalization including paperless transformation, automation, telework enablement, and IT/AI utilization for enterprise customers.

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability1 record

Feature2 records

Partnerships

Twelve partnerships are on record, tiered core and minor.

• クラスメソッド株式会社coreOthersParent company (親会社) of Classmethod Operations. The new company name inherits the Classmethod brand, leveraging the parent company's technical capabilities and brand reputation.
• プリズマティクス株式会社minorOthersGroup company within the Classmethod corporate group.
• ネクストモード株式会社minorOthersGroup company within the Classmethod corporate group.
• プロパゲート株式会社minorOthersGroup company within the Classmethod corporate group.
• クラスメソッドテクノロジーズ株式会社minorOthersGroup company within the Classmethod corporate group.
• サイバーマトリックス株式会社minorOthersGroup company within the Classmethod corporate group.
• Classmethod (Europe) GmbHminorOthersGroup company within the Classmethod corporate group - European operations.
• Classmethod Canada Inc.minorOthersGroup company within the Classmethod corporate group - Canadian operations.
• Classmethod (Thailand) Co., Ltd.minorOthersGroup company within the Classmethod corporate group - Thailand operations.
• Classmethod Korea Co., Ltd.minorOthersGroup company within the Classmethod corporate group - Korea operations.
• Classmethod Danang Co., Ltd.minorOthersGroup company within the Classmethod corporate group - Vietnam (Danang) operations.
• Classmethod Malaysia Sdn. Bhd.minorOthersGroup company within the Classmethod corporate group - Malaysia operations.

Scale indicators3 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• NTT Data Group Corporation: Japan's largest IT services group; provides cloud migration, managed services, and digital transformation across enterprise and public sector — a scaled incumbent that competes for the same enterprise cloud and managed services RFPs.
• KDDI Corporation: Major Japanese telecom with significant enterprise cloud, managed services, and DX businesses; competes for enterprise managed cloud and digital transformation engagements alongside other large incumbents.
• Nomura Research Institute (NRI): Large Japanese IT consulting and systems integrator with cloud, managed services, and data analytics offerings serving financial services and large enterprise — overlaps with Classmethod Operations' consulting and data platform work.
• Internet Initiative Japan (IIJ): Established Japanese internet/network and cloud services provider with managed cloud operations, multi-cloud, and enterprise IT services; competes for enterprise managed services and hybrid cloud deals overlapping with Classmethod Operations' portfolio.
• Fujitsu Limited: Global Japanese IT services incumbent with extensive cloud, managed infrastructure, and digital transformation offerings; targets the same enterprise and mid-market customers in Japan for cloud operations and DX.
• Accenture plc (Japan): Global professional services firm with a large Japan AWS practice; competes for enterprise cloud migration, managed services, and AX engagements at the high end of the market.
• TIS Inc. Major Japanese IT services company with cloud, managed services, and digital transformation practices; competes for enterprise cloud operations and data platform engagements.

Direct peers

• Serverworks Co., Ltd. One of Japan's leading pure-play AWS Premier Tier managed services and migration partners; competes head-to-head for the same enterprise AWS operations, design-build, and ongoing managed cloud engagements in Japan.
• Classmethod K.K. Parent company and the most direct peer: a Japan-based AWS Premier Tier consulting partner offering AWS migration, managed cloud operations, and data analytics — substantially overlapping the subsidiary's services, with the parent operating the broader technical ecosystem the subsidiary inherits.

Emerging players

• Slalom LLC: Global technology consulting firm with a strong AWS partnership focus; competes for cloud transformation, data analytics, and managed services work — comparable in style of agile, specialized cloud consulting.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/%E3%82%A2%E3%83%8E%E3%83%86%E3%83%BC%E3%82%B7%E3%83%A7%E3%83%B3%E6%A0%AA%E5%BC%8F%E4%BC%9A%E7%A4%BE

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 →

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