税理士法人イデアコンサルティング

What 税理士法人イデアコンサルティング does

Ideaconsulting Tax Corporation (税理士法人イデアコンサルティング) is a privately held Japanese tax accountant legal entity founded on April 1, 2008, headquartered on the 15th floor of Ebisu Garden Place Tower in Shibuya, Tokyo. The firm provides recurring tax advisory, accounting/bookkeeping, payroll, social insurance, tax investigation defense, company formation, inheritance and succession planning, real estate tax structuring, small/mid-market M&A advisory, and restaurant business establishment support under representative partners Ito Daisuke (former National Tax Agency official) and Ozono Masanori. Service delivery is organized around ongoing 顧問 (advisory) contracts for venture companies and SMEs, with structured cross-referral into discrete service modules such as inheritance (via souzoku.asahi.com) and tax investigation (via ideaconsulting.red), plus a sub-brand at ideaconsulting.net for accounting outsourcing and restaurant establishment support.

The firm operates without disclosed external capital and is wholly partner-owned, with two affiliated group entities: a social insurance labor consultant corporation (社会保険労務士法人イデアコンサルティング) and a general business consulting company (株式会社イデアコンサルティング). Technology footprint is limited to standard third-party accounting and payroll software rather than proprietary systems; the firm holds no patents or AI/ML assets. Marketing channels include company website content, seasonal office newsletters ("事務所通信" published through 2026), media features (KINZAI Financial Plan, Rakuten-related press), referral networks via financial institutions, and directory listings on Advisor-Navi and Axconsulting.

Customer mix is concentrated in Japanese SMBs and entrepreneurs spanning painting/construction, restaurant/food service, design, equipment trading, sports/recreation, illustration, web production, and application development. Customer engagement is multi-year with documented 10+ year relationships. The firm is registered as a 中小M&A支援機関 under the national M&A support institution framework and runs a bi-annual "Business Success Laboratory (ビジネス成功研究会)" client networking forum as a retention and referral mechanism. Operating geography is the Kanto Region of Japan only, with no international or franchise footprint.

Name

税理士法人イデアコンサルティング

Legal name

税理士法人　イデアコンサルティング

Website

https://ideaconsulting.jp

Company type

Private

Founded year

2008

Operating status

Operating

Headcount range

11–50 employees

Short description

Ideaconsulting Tax Corporation is a privately held Japanese tax accountant firm founded in 2008, based in Ebisu, Tokyo, that provides recurring tax advisory, accounting, M&A, inheritance, and social insurance services to venture companies and SMEs across Japan.

Ownership category

akta.pro rank

Product category

Tax Advisory & Accounting Services

NAICS

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

SIC

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

akta.pro primary industry

Business Owner & Executive Financial Planning (FSAEAAAO)

akta.pro secondary industries

Transaction Tax Structuring & Deal Advisory (BPAHAOAJ), Tax Operations Support (Indirect Tax, Withholding, Compliance Admin) (BPAAAGAI), Tax-Aware Retirement & Estate Coordination (FSAEABAJ)

Keywords

• Tax advisory services
• Accounting outsourcing
• Inheritance tax planning
• M&A advisory services
• Company formation services

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Tax Advisory and Consulting Services: Ongoing advisory contracts providing tax accounting services, tax filing, and financial consulting. Revenue generated through recurring professional service fees for tax advisory and compliance.
2. Specialized Services: One-time and project-based services including company formation, M&A advisory, inheritance tax planning, real estate consulting, and social insurance processing.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

Ideaconsulting is a Tokyo-based tax accountant corporation providing tax advisory, accounting, inheritance, M&A, real estate consulting, social insurance, company formation, tax investigation support, restaurant business support, and bookkeeping outsourcing services primarily to SMEs, venture companies, and entrepreneurs in Japan. The firm combines certified tax accountants and social insurance labor consultants under one roof to deliver integrated compliance and consulting engagements.

Product overview

税理士法人イデアコンサルティングは、東京都渋谷区恵比寿に本社を置く税理士法人で、税務顧問・相続・経理代行・飲食店サポート・社会保険業務・税務調査・会社設立・不動産・M&Aの専門サービスを提供するプロフェッショナルサービス firmです。サービスは個別の専門モジュールとして提供され、税務顧問を核として必要に応じて他のサービスへとシームレスに連携する体制を構築しています。グループ内に社会保険労務士法人イデアコンサルティングも傘下に置き、ワンストップでの総合的な経営支援を実現しています。

Differentiator

Problem solved

Functional benefit

Brands

• идеaconsulting.net: Accounting outsourcing (経理代行) service platform operated by the company.
• ideaconsulting.net (飲食店サポート)

Products and services

• Tax Advisory (税務顧問) Ongoing tax advisory service for businesses and individuals, led by certified tax accountants and including tax filing, planning, and consultation.
• Inheritance (相続) Advisory and support for inheritance tax planning, succession and estate-related matters for individuals and families.
• Accounting Outsourcing (経理代行) Outsourced bookkeeping and accounting services for SMEs and venture companies, handling day-to-day accounting entries and reporting.
• Restaurant Business Support (飲食店サポート) Dedicated tax and accounting support tailored to restaurant and food service operators.
• Social Insurance Services (社会保険業務) Social insurance and labor-related consulting delivered by in-house social insurance labor consultants, integrated with the firm's tax services.
• Tax Investigation Support (税務調査) Support and representation for clients facing Japanese tax authority investigations, leveraging the firm's National Tax Agency expertise.
• Company Formation (会社設立) Advisory and administrative support for establishing new companies in Japan, including legal entity setup and initial filings.
• Real Estate Consulting (不動産) Tax and accounting advisory for real estate holdings, transactions, and investments for individual and corporate investors.
• M&A Advisory (M&A) Advisory support for mergers, acquisitions, business succession, and related transactions, integrating tax and accounting perspectives.

Quantifiable outcome

• Multiple clients report achieving profitable operations and clear financial visibility
• +1 more outcomes

Named customers9 records

Segments4 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.

• 税理士コンシェルジュ (Zeirishi Concierge)coreChannel Partner/ Reseller/ Distributor · 9 June 2025Business partnership with tax accountant referral service having network of 1,000 tax professionals. When the firm cannot handle certain specialized work, clients are referred to 税理士コンシェルジュ. The partnership enables comprehensive service coverage across specialized tax and accounting needs.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• 税理士法人チェスター (Chester Tax Accountant Corporation): Mid-sized Japanese 税理士法人 with strong inheritance tax specialization alongside broader SME advisory. Comparable in service breadth and partner-led mid-market positioning, making it the closest direct competitor for Idea Consulting's tax advisory and succession services.
• 税理士法人TOMA (TOMA Tax Corporation): Multi-office 税理士法人 offering tax advisory, social insurance, M&A, and business consulting. Comparable on the one-stop service model for SMEs and the inclusion of group structure (tax + social insurance); however larger and more geographically diversified.
• 税理士法人あおば (Aoba Tax Accountant Corporation): Tokyo-based 税理士法人 serving SMEs and individuals with tax filing, advisory, and accounting services. Comparable size and target client profile, with overlapping service offerings in bookkeeping and tax investigation support.
• 税理士法人TOTAL (TOTAL Tax Corporation): Tokyo-based 税理士法人 offering comprehensive tax, accounting, social insurance, and M&A advisory for SMEs and entrepreneurs. Directly comparable in target segments (venture/SME), service mix (tax advisory + HR + M&A), and mid-sized partner-led structure.

Emerging players

• スタートアップ税理士法人 (Startup Tax Accountant Corporation): Emerging 税理士法人 specializing in venture and startup clients with digital-first service delivery. Competes directly for Idea Consulting's primary entrepreneur/venture segment but uses a more tech-enabled, scalable model that could pressure pricing.
• freee株式会社 (freee K.K.): Cloud accounting and HR SaaS platform for Japanese SMEs. Disrupts the traditional 経理代行 (bookkeeping outsourcing) market that Idea Consulting occupies, representing a structural substitute risk rather than a direct competitor today.
• 株式会社マネーフォワード (Money Forward, Inc.): Cloud accounting, payroll, and tax SaaS provider for SMEs and individuals. Represents the technology-led alternative to traditional tax/accounting advisory for Idea Consulting's SME clients, with potential to compress routine compliance volumes.

Broad incumbents

• 辻・本郷 税理士法人 (Tsuji & Hongo Tax Corporation): One of Japan's largest 税理士法人 with multi-office nationwide presence and full-service tax, accounting, and consulting. Serves the same SME and high-net-worth client base but at significantly larger scale, representing the aspirational incumbent for a growing mid-sized firm.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks4 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/ekaikei
• LinkedInlinkedin.com/company/%E7%A8%8E%E7%90%86%E5%A3%AB%E6%B3%95%E4%BA%BA%E3%82%A4%E3%83%87%E3%82%A2%E3%82%B3%E3%83%B3%E3%82%B5%E3%83%AB%E3%83%86%E3%82%A3%E3%83%B3%E3%82%B0

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries2 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 →

Frequently asked questions about 税理士法人イデアコンサルティング