What AGS Consulting does

AGS Consulting (株式会社AGSコンサルティング) is a Japan-headquartered accounting and consulting firm founded in 1971 and operating as the parent of the AGS Group, a privately held organization with 501–1,000 employees. The firm delivers integrated professional services across four pillars: tax and accounting advisory, international services (cross-border tax, transfer pricing, overseas expansion/withdrawal), consulting services (IPO support, management advisory, corporate restructuring, HR and systems consulting, fund management), and M&A advisory (financial advisory, due diligence, valuation, post-merger integration). Its professional base of 121 certified public accountants and 124 licensed tax accountants as of January 2026 supports an active book of approximately 4,500 corporate clients across diverse industries including manufacturing, retail, technology, healthcare, and government-linked entities.

The business model is anchored in recurring tax and accounting retainers, supplemented by project-based consulting and M&A advisory engagements. The firm has cumulatively supported 230 IPO engagements and executed 390 M&A/advisory deals in fiscal year 2025, providing recurring revenue visibility while generating project-driven upside. Distribution is exclusively direct: enterprise field sales through professional staff, complemented by content marketing (AGS Media), event sponsorships (ICC Summit, B Dash Camp), the proprietary AGS client matching platform (cs.agsc.co.jp, launched April 2024), and the AGS MEET UP client event. Geographic coverage spans 8 direct overseas offices (Singapore 2013, Hong Kong 2017, Malaysia 2018, Thailand/Vietnam/Philippines 2019, Indonesia 2024, Shanghai 2025) and the ASTHOM PARTNERS global accounting network covering 16 countries.

The group operates through specialized subsidiaries including AGS Tax Firm, AGS FAS (financial advisory), LNOB Consulting, AGS Skill Partners (HR/staffing), AGS Capital Partners (established April 2025 for startup investment), Family Office Design, and a jointly controlled stake in ASTHOM PARTNERS. There is no parent company, no private equity backing, and no public listing. Recent strategic actions — including the ASTHOM network expansion to add IKG FAS (Netherlands) and Blick Rothenberg (UK) in March 2025, the Shanghai and Indonesia openings, and the launch of AGS Capital Partners — signal an active growth posture focused on international footprint, product breadth, and startup ecosystem engagement.

Name

AGS Consulting

Legal name

株式会社AGSコンサルティング

Website

https://agsc.co.jp

Company type

Private

Founded year

1971

Operating status

Operating

Headcount range

501–1,000 employees

Short description

AGS Consulting is a Tokyo-headquartered Japanese accounting and consulting firm founded in 1971, employing 121 CPAs and 124 tax accountants to serve 4,500 corporate clients with integrated tax, international, IPO, and M&A advisory services across Asia and a 16-country global network.

Ownership category

akta.pro rank

Product category

Accounting & Professional Services

NAICS

Administrative Management and General Management Consulting Services (541611), Management Consulting Services (54161)

SIC

Services-Management Consulting Services (8742), Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Strategy & Corporate Development Consulting (BPAHACAA)

akta.pro secondary industries

M&A Advisory (Buy-Side & Sell-Side) (BPAHAOAA), Corporate Finance & Capital Advisory (BPAHADAB)

Keywords

• Accounting services
• Tax advisory
• M&A advisory
• IPO consulting
• International tax

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices13 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Tax and Accounting Advisory: Ongoing tax and accounting advisory services provided to corporate clients, typically on a retainer/recurring fee basis. The firm has 4,500 corporate clients under engagement, delivering tax advisory, compliance, and accounting services.
2. Consulting Services: IPO consulting, management support, corporate turnaround, HR consulting, system consulting, and fund management services. Delivered as project-based or recurring advisory engagements.
3. M&A Services: Financial advisory, due diligence, valuation, and post-merger integration (PMI) services for M&A transactions.
4. International Services: International tax and accounting advisory, cross-border M&A support, transfer pricing, overseas market entry/withdrawal support, and global finance advisory, provided through a network of 8 overseas offices covering 16 countries.
5. AGS Capital Partners: Investment fund management and startup capital/practical support services. Established in April 2024 to provide capital and practical investment support to startups.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels7 records

Core offering

AGS Consulting is a Japan-based professional services firm providing tax and accounting advisory, international business services, management consulting, and M&A advisory (financial advisory, due diligence, valuation, PMI) to corporate clients. The firm also operates a startup investment vehicle (AGS Capital Partners) and a global accounting network (ASTHOM PARTNERS) covering 16 countries.

Product overview

AGS Consulting operates as a comprehensive accounting and consulting firm offering integrated professional services through multiple specialized divisions. The core service portfolio consists of Tax & Accounting Services (税务・会計サービス), International Services (国際サービス), Consulting Services (コンサルティングサービス), and M&A Services (M&Aサービス). These are supplemented by specialized sub-brands including AGS FAS for financial advisory, AGSキャピタルパートナーズ for startup investment support, and ASTHOM partners as a global accounting network covering 16 countries. The firm also operates supporting platforms such as AGS media for content marketing and a client business matching platform. The service architecture is organized around the accounting/tax foundation with specialized consulting services layered on top, supported by a network of international offices across Asia (Singapore, Malaysia, Thailand, Vietnam, Philippines, Indonesia, Hong Kong, China) and membership in the ASTHOM partners global network.

Differentiator

Problem solved

Functional benefit

Products and services

• Tax & Accounting Services (税務・会計サービス)
• International Services (国際サービス)
• Consulting Services (コンサルティングサービス)
• M&A Services (M&Aサービス)
• IPO Consulting (IPOコンサルティング)
• AGS Capital Partners (AGSキャピタルパートナーズ)
• AGS FAS
• Talent Introduction Service (人材紹介サービス)

Quantifiable outcome

• 4,500 corporate clients served
• +3 more outcomes

Named customers7 records

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Five partnerships are on record, tiered core, minor and flagship.

• IKG FAS B.V. (Netherlands)coreStrategic or Co-development Partner · 1 March 2025Dutch accounting advisory firm established in 2022, specializing in M&A, intra-European subsidiary accounting/management strengthening, and sustainability support. Joined ASTHOM PARTNERS in March 2025, expanding the network's European coverage to the Netherlands.
• Blick Rothenberg (UK)coreStrategic or Co-development Partner · 1 March 2025UK-based accounting, audit, and tax advisory firm founded in 1945. Joined ASTHOM PARTNERS in March 2025 following the integration of Greenback Alan LLP, expanding the network's UK and European coverage.
• ザミオ (Zamio)minorStrategic or Co-development Partner · 1 November 2024AGS Consulting entered a capital and business alliance with Zamio in November 2024, combining tax/accounting expertise with human resources/talent services to provide integrated management support aligned with client business needs.
• ASTHOM PARTNERS株式会社flagshipStrategic or Co-development Partner · 1 December 2022ASTHOM PARTNERS is a global accounting network co-founded by AGS and Hotta Liesenberg Saito LLP (USA) in December 2022. Member firms include AGS (Japan), HLS (USA), IKG FAS B.V. (Netherlands), and Blick Rothenberg (UK). The network provides cross-border accounting, tax, and advisory services covering 16 countries. AGS serves as the Japan representative within this network.
• Hotta Liesenberg Saito LLP (HLS)coreStrategic or Co-development Partner · 1 December 2022US-based accounting and advisory firm and co-founder of ASTHOM PARTNERS global network. Together with AGS, HLS co-founded the global network to serve Japanese companies with US operations and cross-border advisory needs.

Scale indicators7 records

Recent moves13 records

Expansion highlights6 records

Broad incumbents

• EY Japan (Ernst & Young ShinNihon): EY Japan is the Japanese member of EY, providing audit, tax, transaction advisory, and consulting services. It directly overlaps with AGS in M&A advisory and IPO support, especially for mid-market Japanese corporates pursuing inbound and outbound deals.
• PwC Japan LLC: PwC Japan is the Japanese member of PwC, offering assurance, tax, deal advisory, and consulting services. It competes with AGS in M&A advisory, IPO readiness, and corporate finance work, with a broader global brand and deeper resource pool.
• Deloitte Tohmatsu Group: Deloitte Tohmatsu is the Japanese member of Deloitte, offering audit, tax, consulting, financial advisory, and M&A services. It competes with AGS across virtually all service lines but at significantly greater scale and with deeper international reach.
• KPMG AZSA LLC: KPMG AZSA is the Japanese member firm of KPMG, providing audit, tax, and advisory services including M&A and IPO consulting. As a Big Four firm in Japan, it competes with AGS on large enterprise engagements while operating a much broader global platform.

Direct peers

• ASG Group (Accounting & Advisory Group): ASG Group is one of Japan's largest mid-tier accounting and consulting firms, offering tax, audit, M&A, and IPO advisory services. It is the closest direct competitor to AGS Consulting in the Japanese mid-market, with a similar integrated service model and comparable client base.
• HLB Iwao Miyake & Co. (Meisel): HLB Iwao Miyake (formerly HLB Meisel) is a Japanese mid-tier accounting firm in the HLB International network, providing tax, audit, and advisory services. It is a comparable mid-tier peer for AGS, particularly in serving Japanese corporates with international operations.
• Baker Tilly Japan: Baker Tilly Japan is the Japanese member of Baker Tilly International, offering audit, tax, and M&A advisory services. As another international mid-tier network member serving Japanese corporates, it overlaps with AGS in cross-border advisory and IPO support work.
• Grant Thornton Taiyo LLC: Grant Thornton Taiyo is a Japanese mid-tier accounting firm and member of Grant Thornton International, providing audit, tax, and advisory services. It is highly comparable to AGS as a mid-tier peer targeting mid-market Japanese corporates with both domestic and cross-border capabilities.
• BDO Sanyu & Co. BDO Sanyu is the Japanese member of BDO, a global mid-tier accounting network, offering audit, tax, and M&A advisory services. It directly competes with AGS in the Japanese mid-market, especially on cross-border M&A and IPO advisory.
• RSM Japan (RSM Seiwa): RSM Seiwa is the Japanese member of RSM International, providing audit, tax, and consulting services to mid-market companies. As a comparable mid-tier firm with international network access, it competes with AGS for similar mid-cap Japanese corporate clients.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/agsc_jp
• YouTubeyoutube.com/channel/UCs0uyv2iH9JkbyWyqZRj4hA

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries7 records

Funding overview

Funding rounds

Investors

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

M&A

Investments4 records

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

Frequently asked questions about AGS Consulting