RSM Shiodome Partners

Name

RSM Shiodome Partners

Legal name

RSM Shiodome Partners Limited

Website

https://shiodome.co.jp

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

251–500 employees

Ownership category

akta.pro rank

Product category

Professional Services (Accounting, Tax, HR, Legal & Advisory)

NAICS

Professional, Scientific, and Technical Services (541), Offices of Certified Public Accountants (541211), Accounting, Tax Preparation, Bookkeeping, and Payroll Services (54121)

SIC

Finance Services (6199), Investment Advice (6282)

akta.pro primary industry

Immigration Outsourcing & Managed Services (BPO/RPO for Immigration) (THACAKAM)

akta.pro secondary industry

Family Office Services (Single & Multi-Family Office) (FSABADAF)

Keywords

• Professional services
• Accounting and tax advisory
• HR and labor consulting
• M&A consulting
• IPO consulting

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices10 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Professional Consulting Services: The firm generates revenue through comprehensive professional services including accounting, tax advisory, HR and labor consulting, legal services, M&A consulting, IPO preparation support, ESG consulting, IT consulting, immigration services, and sports business advisory. Services are provided on a time-based or fixed-fee basis.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

RSM Shiodome Partners is a one-stop professional services firm providing integrated consulting and BPO services across accounting, tax, HR/labor, immigration, legal/licensing, advisory, M&A, market entry (Japan and overseas), IT consulting, ESG/sustainability, family business, and sports business. Services are delivered by a multi-disciplinary team of certified public accountants, tax accountants, labor consultants, administrative scriveners, and judicial scriveners operating through multiple affiliated corporations across 10 offices in Japan.

Product overview

RSM Shiodome Partners operates as a comprehensive one-stop professional services firm, offering integrated consulting and BPO services through multiple specialized divisions. The core portfolio consists of 12 major service categories: Accounting & Tax Advisory, HR & Labor Management, Immigration, Legal & Licensing, Advisory, M&A Consulting, Japan Market Entry, Overseas Expansion, IT Consulting, ESG & Sustainability, Family Business, and Sports Business. These core services are complemented by Solution modules including Global Employer Services (GES) for international HR management, Business Financing for startup and IPO preparation funding, Talent Introduction, Safety & Security Support, and Philosophy & Management Concept Consulting. The firm is part of the RSM global network spanning approximately 120 countries with around 56,000 professionals. Multiple affiliated entities (RSM汐留パートナーズ税理士法人, 社会保険労務士法人, 、行政書士法人, 司法書士法人) provide integrated professional services under unified management.

Differentiator

Problem solved

Functional benefit

Products and services

• Accounting & Tax Advisory Services (会計・税務) Comprehensive accounting, tax filing, and tax advisory services for corporate clients, covering international tax, transfer pricing, IPO tax, M&A tax, business succession, tax due diligence, group tax-consolidation, tax return preparation, tax investigation support, and bookkeeping/payment/billing agency services.
• HR & Labor Management Services (人事・労務) HR advisory, labor compliance, international HR consulting, IPO-related labor services, M&A labor consulting, labor/HR/human rights due diligence, labor audit/short review, HR digital transformation, payroll processing, social insurance administration, employment regulations drafting, and HR system design services.
• Immigration Services (イミグレーション) Visa application support covering US visa, certificate of eligibility, period of stay renewal, status change, permanent residency, foreign worker employment consulting, work visas, specified skills visas, business management visas, and entertainment visas for foreign athletes.
• Legal & Licensing Services (法務・許認可) Corporate legal affairs, licensing procedures, minutes and corporate registration services, inheritance and will support, and Japanese subsidiary establishment services.
• Advisory Services (アドバイザリー) IPO consulting, internal control (JSOX), internal audit, disclosure documentation, English disclosure/IR consulting, IFRS consulting, valuation and due diligence, blockchain and digital asset consulting, and management accounting DX support.
• M&A Consulting Services (M&Aコンサルティング) Comprehensive M&A advisory including deal sourcing, due diligence, deal structuring, and post-merger integration support, alongside M&A tax and labor consulting.
• Japan Market Entry Consulting (日本進出コンサルティング) Supports foreign companies entering the Japanese market with setup, compliance, tax, immigration, and operational consulting services, including subsidiary establishment, visa support, and foreign worker employment consulting.
• Overseas Expansion Consulting (海外進出コンサルティング) Assists Japanese companies with overseas market entry strategies and operations in Asia-Pacific, Europe, Middle East, North America, Latin America, and Africa, including overseas tax consulting and local subsidiary consulting.
• IT Consulting Services (ITコンサルティング) Business DX, SaaS implementation, ERP implementation, Microsoft Power Platform, cybersecurity, ISO/IEC 27001:2022 information security certification support, digital gateway, external CISO, and cyber attack response services.
• ESG & Sustainability Services (ESG・サステナビリティ) CDP disclosure support, ESG sustainability management, ESG due diligence, human rights initiatives, GHG emissions management, LCA/CFP calculation, SBT certification, SSBJ disclosure, TCFD/TNFD disclosure, carbon credits, ISO30414 human capital disclosure, and integrated report creation support.
• Family Business Consulting (ファミリービジネス) Management diagnosis, owner asset succession, business succession, governance strengthening, outside director/auditor services, successor development, family office establishment, philanthropy support, social impact disclosure, and wealthy individual relocation services.
• Sports Business Services (スポーツビジネス) Tax and accounting support for sports teams, financial asset management for athletes/coaches, entertainment visas for foreign athletes, work visas for foreign coaches/trainers/interpreters, integrity and compliance framework building for sports organizations, and management/business improvement support for sports clubs.
• Global Employer Services (GES) One-stop service for global companies employing personnel across multiple countries, covering international HR management, tax compliance, legal regulations, mobility management, and global employment outsourcing (GEO).
• Business Financing Services (資金調達サービス) Startup financing support for entrepreneurs and IPO preparation advisory including capital policy, business planning, and financing support from angels, VCs, CVCs, and corporations.
• Talent Introduction Services (人材紹介サービス) Professional talent recruitment and placement services connecting companies with qualified candidates.
• Safety & Security Support Services (防犯・安全セキュリティ支援) Security consulting and support services for business protection and safety management.
• Philosophy & Management Concept Consulting (フィロソフィ・経営理念構築／浸透コンサルティング) Assists companies in building and embedding organizational philosophy and management principles throughout the organization.

Named customers8 records

Segments11 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• Levanga HokkaidocoreStrategic or Co-development Partner · 10 November 2025RSM Shiodome Partners has signed a corporate support partnership with Levanga Hokkaido, a professional basketball team in Japan's B.LEAGUE, for the 2025-26 season. Under the agreement, RSM Shiodome Partners will provide comprehensive advisory services across management, finance, human resources, governance, and tax matters to support the club's sustainable growth and create an environment where players and staff can focus on performance. Both organizations share a commitment to revitalizing local Hokkaido communities through sports, representing a new form of partnership that goes beyond traditional sponsorship.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• KPMG AZSA LLC: KPMG AZSA is the Japan member of KPMG, one of the Big 4. It provides full-spectrum audit, tax, advisory, and consulting services to enterprises and large mid-market clients in Japan. A larger incumbent competitor across RSM Shiodome's core service lines.
• EY ShinNihon LLC: EY ShinNihon is the Japan member of Ernst & Young (Big 4), offering audit, tax, deals, and consulting. Notably, RSM Shiodome's founder Kengo Maekawa previously worked in EY ShinNihon's audit department. Represents a larger incumbent in the firm's core accounting/audit and tax advisory markets.

Direct peers

• BDO Japan: BDO Japan is the Japan member of BDO Global, an international accounting network with mid-market focus. Like RSM Shiodome Partners, it provides accounting, tax, and advisory services to Japanese corporates with international network reach for cross-border work.
• Grant Thornton Japan: Grant Thornton Japan is a mid-tier international accounting and advisory network in Japan serving mid-market and growth clients with audit, tax, and consulting services. Comparable to RSM Shiodome in international affiliation, mid-market positioning, and multi-service offering.
• Crowe Japan: Crowe LLP's Japan member provides accounting, tax, and consulting to mid-market clients with international cross-border coordination through the Crowe Global network. Directly comparable in scale and positioning to RSM Shiodome Partners.
• AGS Consulting: AGS Consulting is a Japan-based professional services firm offering accounting, tax, IPO consulting, M&A, and HR/labor advisory. CRO Sota Yamaguchi of RSM Shiodome joined from AGS Consulting, indicating direct competitive overlap in IPO, internal control, and M&A advisory services to Japanese mid-market clients.
• Mazars Japan: Mazars (now Forvis Mazars) operates a Japan office providing audit, tax, and advisory services to mid-market and cross-border clients. Closely comparable as an internationally affiliated, mid-tier professional services firm in Japan.
• RSM Japan (other member firm): Other RSM International member firms in Japan provide accounting, tax, and advisory services under the same global brand. They share the same network resources, methodology, and cross-border referral pipeline, but typically differ in regional focus or service mix within Japan.
• Baker Tilly Japan: Baker Tilly Japan's Japan member firm provides accounting, tax, and advisory services to mid-market clients with international network support. Comparable scale and positioning to RSM Shiodome Partners as a global-network-affiliated Japanese advisory firm.

Emerging players

• Yayoi Co., Ltd. Yayoi provides accounting/HR SaaS and BPO services to Japanese SMEs and mid-market including bookkeeping, payroll, and tax filing workflows. Overlaps with RSM Shiodome on the BPO/HR/payroll side but competes more on technology-enabled scale rather than high-end advisory.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/authwall
• Xx.com/rsmsp_official
• Facebookfacebook.com/rsmsp.official

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

Subsidiaries5 records

Funding overview

Funding rounds

Investors

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

M&A

Investments1 record

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

Frequently asked questions about RSM Shiodome Partners