Thomson Reuters Japan - トムソン・ロイター

What Thomson Reuters Japan - トムソン・ロイター does

Thomson Reuters Japan K.K. (トムソン・ロイター株式会社) is the Japanese operating subsidiary of Thomson Reuters Corporation (NYSE/TSX: TRI), providing professional-grade information and technology solutions across legal, tax & accounting, and global trade domains. The company serves more than 6,000 organizations in Japan, including large multinational corporations (Asahi Kasei, Mitsui & Co., Renesas, Mitsui Chemicals, Toyota Shokki, Resonac, Snowpeak, Tech Mahindra, Redington), law firms, government agencies, and tax professionals. Its portfolio spans three core product families: Westlaw Japan (an online legal research database with 330,000+ case precedents, statutes, and administrative decisions), ONESOURCE (a tax & accounting automation suite covering tax provision, indirect tax determination/compliance, data collection, statutory reporting, e-invoicing via Pagero, and global minimum tax), and ONESOURCE Global Trade (export/import compliance, FTA analysis, denied party screening, and HS code classification across 220+ countries). Atop these platforms sits CoCounsel, a professional-grade generative AI assistant for legal professionals with eight core skills (deposition preparation, document drafting, document review, summarization, database searching, contract analysis, compliance checking, and timeline organization), available in Japanese since October 2025. The technology stack combines proprietary licensed content databases, AI and generative AI models (Anthropic Claude, OpenAI GPT, Google Gemini plus proprietary AI under a certified ISO/IEC 42001:2023 AI management system), and cloud-based workflow automation, with 4,500+ internal experts verifying AI outputs.

Name

Thomson Reuters Japan - トムソン・ロイター

Legal name

Thomson Reuters Japan K.K. (トムソン・ロイター株式会社)

Website

https://thomsonreuters.co.jp

Company type

Public

Founded year

1989

Operating status

Operating

Headcount range

11–50 employees

Short description

Thomson Reuters Japan K.K. is the Japanese subsidiary of Thomson Reuters Corporation, providing professional-grade legal research (Westlaw Japan), tax and accounting automation (ONESOURCE), global trade compliance, and CoCounsel generative AI solutions to over 6,000 organizations including major Japanese multinationals and law firms.

Ownership category

akta.pro rank

Product category

Legal, Tax, and Trade Information Software

NAICS

Accounting, Tax Preparation, Bookkeeping, and Payroll Services (5412), Legal Services (5411), Other Accounting Services (541219)

SIC

Books: Publishing Or Publishing & Printing (2731), Miscellaneous Publishing (2741)

akta.pro primary industry

Tax & Accounting Publishing (Codes, Guidance, Practice Tools) (MPAJACAD)

akta.pro secondary industries

Transfer Pricing & International Tax Services (BPAHABAI), Sanctions, Embargo & Export Controls (EAR/ITAR) Compliance Tools (TLAEAOAI), Product Regulatory Compliance for Cross-Border Trade (e.g., FDA, USDA, CPSC, CE/REACH/RoHS) (TLACAGAH), Finance, Accounting & Tax Reference (GAAP/IFRS, Audit, Compliance, Tax) (EDAGAGAE), Tax Return Filing, Processing & Assessment (BPAIADAC)

Keywords

• Legal research software
• Tax automation software
• Global trade compliance
• Regulatory information services
• Professional AI tools

Headquarters

HQ city

Tokyo (東京都)

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Legal Solutions (Westlaw Japan, CoCounsel, Practical Law, HighQ, Legal Tracker): Subscription-based online legal information and AI-powered legal tech services. Westlaw Japan provides case law and statutory database access. CoCounsel provides generative AI legal assistant. Practical Law provides international legal know-how. HighQ provides legal collaboration and matter management. Pricing follows annual subscription models with per-seat or enterprise-level tiers.
2. Tax & Accounting (ONESOURCE Suite): Comprehensive tax automation solutions including Checkpoint World, DataFlow, WorkFlow Manager, Tax Provision, Indirect Tax Determination, Indirect Tax Compliance, Statutory Reporting, Global Minimum Tax, Pagero e-invoicing, and Confirmation. Primarily subscription-based with annual licensing. Supports global tax compliance, data collection, reporting, and audit processes.
3. Global Trade Management (ONESOURCE Global Trade): International trade management solutions covering export compliance, import compliance, FTA analyzer, global classification, denied party screening, supply chain compliance. Subscription-based with content licensing. Includes AI-powered Global Classification and Global Trade Research modules powered by CoCounsel.
4. Compliance e-Learning: Customizable online compliance training courses in Japanese and 25+ languages covering anti-bribery, code of conduct, data privacy, harassment prevention, information security, subcontract law, labor management, and more. Sold as part of compliance solution bundles.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels12 records

Core offering

Thomson Reuters Japan provides professional-grade content and technology solutions for legal, tax & accounting, and global trade professionals in Japan. Core offerings include the Westlaw Japan legal research database (330,000+ case records), the CoCounsel generative AI legal assistant with 8 core legal skills, the ONESOURCE suite for tax automation (DataFlow, Tax Provision, Indirect Tax, Pagero e-invoicing, Checkpoint World), and the ONESOURCE Global Trade platform for export/import compliance, FTA analysis, HS classification, and denied party screening across 220+ countries. Products are sold as subscriptions to law firms, multinational corporations, government agencies, and tax professionals.

Product overview

Thomson Reuters Japan operates a multi-platform portfolio providing professional-grade information and technology solutions across legal, tax & accounting, global trade, and compliance domains. The core offerings include: (1) Legal suite centered on Westlaw Japan (330,000+ case records, Japanese law database) and CoCounsel (generative AI assistant with 8 core skills for legal professionals), supplemented by HighQ (collaboration), Practical Law (know-how), Legal Tracker (spend management), and Westlaw international products; (2) ONESOURCE tax & accounting platform covering DataFlow (data collection), Tax Provision (calculation), Indirect Tax (compliance/determination), WorkFlow Manager, Statutory Reporting, Pagero (e-invoicing), Checkpoint World (research), and Orbitax GMT (global minimum tax); (3) ONESOURCE Global Trade solution for export/import compliance, FTA analysis, HS classification, denied party screening, and supply chain compliance across 220+ countries. Products integrate with customer ERP systems (SAP, Oracle) and partner platforms (TradeWaltz, Balance Gateway) to deliver workflow automation and regulatory compliance.

Differentiator

Problem solved

Functional benefit

Brands

• Westlaw Japan (ウエストロー・ジャパン): Japan legal information comprehensive online service providing case law, statutes, administrative decisions, legal publications, and business information databases.
• ONESOURCE
• ONESOURCE Global Trade
• CoCounsel
• HighQ
• Practical Law
• Legal Tracker
• Checkpoint World
• Pagero
• Confirmation

Products and services

• Westlaw Japan Japan's most comprehensive online legal research service providing access to over 330,000 case records, statutes, administrative decisions, legal publications, news articles, and commentary for legal professionals in Japan.
• CoCounsel Professional-grade generative AI assistant for legal professionals providing 8 core skills: deposition preparation, document drafting, database searching, document review, summarization, contract data extraction, compliance checking, and timeline organization. Used by 1 million+ professionals across 107 countries.
• CoCounsel Core Japanese Version Japanese-localized version of CoCounsel Core built with Japanese lawyers for Japanese legal reasoning. Provides document review, comparison, summarization, database search, drafting, deposition preparation, and timeline skills with Japanese-language output capability.
• ONESOURCE Global Trade Comprehensive international trade management solution covering export compliance, import compliance, FTA/EPA management, trade analytics, HS code classification, supply chain compliance, and denied party screening across 220+ countries and regions.
• ONESOURCE DataFlow Cloud-based tax data collection platform enabling multinational companies to gather, manage, and consolidate tax information from subsidiaries globally with Excel-based workflow, multi-language support, progress tracking, overwrite protection, and approval process management.
• ONESOURCE Tax Provision Tax calculation software automating tax provision processes and internal controls, supporting regional and group-level tax accounting with comprehensive reporting capabilities for multinational enterprises.
• ONESOURCE Indirect Tax Determination Automated tax determination and calculation solution that calculates taxes in milliseconds, processing millions of transactions daily across global business operations with real-time tax rate and regulation updates.
• ONESOURCE Indirect Tax Compliance Automated sales tax, use tax, VAT, and GST compliance solution providing real-time tax rates, customizable tools, e-filing support, and data matching and reconciliation capabilities for global compliance.
• ONESOURCE WorkFlow Manager Workflow management software combining document management and data management to streamline and strengthen the entire tax process, improving internal controls and data collection efficiency.
• ONESOURCE Statutory Reporting Financial statement preparation solution enabling efficient and flexible report creation with simplified workflows that reduce time and resource requirements.
• ONESOURCE Pagero E-invoicing platform that connects ERP systems to the Peppol network and government tax authorities globally, enabling compliant digital invoice transmission with automatic format conversion. Handles 20,000+ invoices annually for multinational clients.
• Checkpoint World Comprehensive tax research solution providing global perspective on tax concepts, with timely coverage of frequent tax changes in Europe, Asia, Brazil, and South America.
• Orbitax Global Minimum Tax Global minimum tax solution using a database across 190+ countries to automate data collection, top-up tax calculations, compliance, and Pillar Two forecasting.
• Confirmation Digital audit confirmation platform enabling secure and efficient financial data verification, connecting audit firms with banks and financial institutions globally.
• HighQ Cloud-based legal collaboration and matter management platform enabling law firms and corporate legal departments to manage matters, documents, and projects with internal/external collaboration, matter tracking, and workflow automation.
• Practical Law International legal know-how service providing practical legal guidance, practical notes, and contract templates from a team of 500+ lawyers, enabling faster and more accurate contract drafting and legal practice.
• Legal Tracker Legal spend and matter management solution tracking legal expenditures, vendor management, and eBilling consolidation for corporate legal departments.
• Westlaw Edge Advanced U.S. legal research platform with AI-powered features including KeyCite Overruling Risk and enhanced search capabilities for Japanese legal professionals handling cross-border U.S. legal matters.
• WestlawNext (Westlaw Classic) Global legal research platform providing access to case law, statutes, regulations, and legal commentary across multiple jurisdictions worldwide for Japanese professionals handling international matters.
• Westlaw Japan AI-Assisted Research AI-powered natural language legal research integrated with Westlaw Japan's authoritative database, providing structured, citation-backed answers from Japan's legal content with Smart Search capability.
• ONESOURCE Global Trade AI (Global Classification + Global Trade Research) AI-powered trade compliance suite including Global Classification (HS code classification with confidence scores and rationale) and Global Trade Research (cited answers on tariffs, customs, import/export regulations, sanctions) for trade professionals.

Quantifiable outcome

• Asahi Kasei: Tax data collection expanded from annual to quarterly frequency without proportional increase in workload using ONESOURCE DataFlow across 250 group companies
• +5 more outcomes

Named customers9 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

AI capability9 records

Feature10 records

Partnerships

Five partnerships are on record, tiered core.

• 会計監査確認センター合同会社 (Accounting Audit Confirmation Center LLC)coreTechnology or Integration · 8 September 2025Thomson Reuters Japan partnered with Accounting Audit Confirmation Center to digitize accounting audit confirmation procedures in Japan. The collaboration enables seamless data transmission between Balance Gateway (used by Japanese banks) and Thomson Reuters Confirmation (used by global and Japanese banks' overseas branches), improving efficiency and accuracy of audit confirmation processes for audit firms, auditees, and financial institutions.
• 新日本法規出版株式会社 (Shinnihon Hoki Publishing Co., Ltd.)coreStrategic or Co-development Partner · 1 November 2023Following the full acquisition of Westlaw Japan in November 2023, Shinnihon Hoki Publishing continues as a strategic content partner, providing authoritative Japanese case law and statutory content to Thomson Reuters' Westlaw Japan platform. Previously (2006-2023), both companies were equal joint venture partners in Westlaw Japan Co., Ltd.
• 株式会社トレードワルツ (TradeWaltz Corporation)coreTechnology or Integration · 3 April 2023Thomson Reuters Japan partnered with TradeWaltz to offer ONESOURCE Global Trade modules (Global Trade Content and Analyzer Suite) as part of TradeWaltz's partner services on its blockchain-based global trade information collaboration platform. The integration enables TradeWaltz users to access Thomson Reuters' trade regulatory content and FTA utilization diagnostic tools, addressing complex trade compliance needs in Japan.
• Pagero (acquired by Thomson Reuters)coreTechnology or IntegrationThomson Reuters acquired Pagero (a transportation management system and e-invoicing platform) in 2024, integrating it into the ONESOURCE suite. Pagero provides e-invoicing and Peppol network access, supporting real-time compliance with digital invoice regulations globally across multiple jurisdictions including EU VAT in the Digital Age (ViDA).
• Asian Legal Business (acquired 2011)coreStrategic or Co-development PartnerThomson Reuters acquired Asian Legal Business in 2011 — a leading legal media business covering China, North/Southeast Asia, Japan, Australia, and Middle East. ALB publishes 4 regional monthly magazines, provides Legalbusinessonline.com news, and organizes Law Awards and in-house counsel summits across major Asian cities. 30 employees across Hong Kong, Singapore, and Sydney.

Scale indicators12 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Avalara: Cloud-based tax compliance automation (sales tax, VAT, e-invoicing). Directly competes with ONESOURCE Indirect Tax Determination and Compliance and Pagero for indirect tax automation at Japanese multinationals.
• Vertex Inc. Indirect tax determination and compliance software used by large enterprises. Competes with ONESOURCE Indirect Tax Determination for high-volume transaction tax calculation in Japan and globally.
• LexisNexis: Global legal, regulatory, and information services provider with Lexis+ AI generative AI for legal research. Directly competes with Westlaw Japan and CoCounsel for Japanese law firm and corporate legal department budgets.
• CCH AnswerConnect (Wolters Kluwer): Wolters Kluwer's flagship tax and accounting research platform. Competes head-to-head with Thomson Reuters Checkpoint World for Japanese accounting firm and corporate tax department subscriptions.
• Sovos: Global tax compliance, e-invoicing, and regulatory reporting software. Directly competes with ONESOURCE Pagero and Indirect Tax Compliance, particularly for cross-border e-invoicing mandates (EU ViDA, etc.).
• Wolters Kluwer Japan: Global professional information, software, and services company with strong Japan presence in tax, legal, and compliance (CCH, Enablon). Directly competes with Thomson Reuters Japan across ONESOURCE tax, legal research, and regulatory compliance workflows.

Broad incumbents

• Deloitte (Big 4): Global professional services firm providing tax advisory, legal services, and consulting. Buys and influences selection of Thomson Reuters tools for its Japan practice while competing for tax compliance and advisory work that ONESOURCE and Checkpoint automate.
• Bloomberg Tax: Bloomberg's tax research and technology platform competes with Checkpoint World and ONESOURCE Tax Provision for large multinational tax departments. Part of Bloomberg's broader financial information empire rather than a Japan specialist.
• EY (Big 4): Global professional services firm with significant tax/legal practices. Competes with Thomson Reuters Japan as a service provider while serving as both customer and competitor through its own tax technology investments and managed services.

Others

• TradeWaltz: Japanese blockchain-based global trade information platform and TR partner. Listed as a partner/distributor of ONESOURCE Global Trade modules but also an adjacent infrastructure provider in Japan's trade compliance ecosystem.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/tr_japan1
• YouTubeyoutube.com/playlist?list=PL6t3w9KlrWYZx3xVAXk22IygKvHYU6xq5
• Facebookfacebook.com/thomson.reuters.japan
• LinkedInlinkedin.com/company/thomson-reuters-japan

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 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 Thomson Reuters Japan - トムソン・ロイター