Iroae

Bilingual · Yokohama-based · Worldwide Remote

Working in Japan.
Building in Japan.

English Tax Service.

Bilingual tax service for foreign-funded Japanese subsidiaries, foreign founders incorporating in Japan, and foreign individuals with Japanese tax obligations.

Bilingual CPA + Licensed Tax Accountant (Zeirishi) who served as auditor for TSE Prime-listed companies at Deloitte Tohmatsu.

Free 60-min Consultation050-3628-3750[email protected]

Weekdays 10:00–18:00 JST (weekends & holidays: email)

Indicative Pricing

JPY only

  • Individual / Year

    96,000 JPY+

  • Corporate / Year

    110,000 JPY+

  • Monthly Retainer

    16,000 JPY+

  • Monthly Bookkeeping

    15,000 JPY+

Trust Credentials

CPA + Tax Accountant

Both licenses held

freee 4-Star Advisor

3 freee experts on staff

METI-certified

Oct 2025 certified

SkillBridge CFO & Director

Seed-stage fundraising support

Who We Serve

Three
Audiences.

We serve foreign-funded Japanese subsidiaries, foreign founders incorporating in Japan, and foreign individuals with Japanese tax obligations.

01

Foreign-funded Japanese Subsidiaries

Japanese subsidiaries of US, UK, EU, Singapore, and Australian-headquartered groups.

  • ▸Corporate Income Tax (Hojin Zei) filings
  • ▸Consumption Tax incl. reverse-charge
  • ▸Local taxes (Inhabitant, Enterprise, Fixed Asset)
  • ▸Quarterly intercompany transfer pricing
  • ▸Bookkeeping with English chart of accounts
  • ▸English management reporting
  • ▸Withholding tax to non-residents
02

Foreign Founders Incorporating in Japan

Non-Japanese founders launching startups from incorporation to Series A–B fundraising.

  • ▸KK / GK incorporation procedures
  • ▸Initial post-incorporation tax filings
  • ▸Visa / Status of Residence coordination
  • ▸Bank account opening guidance
  • ▸Founder share & SO plan design
  • ▸Series A / Series B as part-time CFO
  • ▸IPO-readiness for TSE Growth Market
03

Foreign Individuals with Japanese Tax

Permanent / non-permanent / non-resident classification and bilingual filing support.

  • ▸Resident classification analysis
  • ▸Personal income tax (Shotoku Zei)
  • ▸Foreign tax credit (US, UK, EU, etc.)
  • ▸Inhabitant tax (Jumin Zei) filings
  • ▸Inheritance / Gift tax cross-border

5 Reasons to Choose Iroae

Founder's
Five Layers.

Five layers of the founder's background and current roles.

CPATax AccountantActive CFOOutside AuditorAI Director

Services & Pricing

Transparent,
all in JPY.

Indicative pricing. Final fees depend on transaction volume, complexity, and language requirements. All fees exclude consumption tax.

Individual

  • Personal Income Tax Filing

    ★

    From 96,000 JPY / year

  • Inhabitant Tax

    Included

  • Foreign Tax Credit

    From 30,000 JPY / year (add)

  • Inheritance / Gift Tax

    Project-based

Corporate

  • Corporate Income Tax (KK/GK)

    ★

    From 110,000 JPY / year

  • Consumption Tax incl. reverse-charge

    From 30,000 JPY / year (add)

  • Local Taxes

    Included

  • Year-end Adjustment (up to 5)

    From 30,000 JPY / year

Most Popular

Monthly

  • Monthly Tax Advisory (Bilingual)

    ★

    From 16,000 JPY / month

  • Bookkeeping (English COA)

    ★

    From 15,000 JPY / month

  • English Management Reporting

    Included from 30,000 JPY / m

  • API Integration Support

    Project-based

Startup Track for Foreign Founders

Beyond Tax Filing.
CFO & IPO support.

Active CFO and Outside Statutory Auditor experience — delivered in English. Beyond standard tax services for foreign founders and foreign-funded subsidiaries.

Track 01

Series A–B Outsourced CFO

Active CFO of SkillBridge Inc. leads your fundraising, cap table, and investor reporting — in English.

Details: /cfo

Track 02

IPO-Readiness Consulting

Deloitte Tohmatsu alumna with TSE Prime-listed companies IPO and post-listing audit experience leads your J-SOX, internal controls, and disclosures.

Details: /ipo

Track 03

Internal Audit

J-SOX response, internal audit room setup, business audits, subsidiary / M&A audits — with bilingual deliverables.

Details: /audit

Frequently Asked Questions

FAQ
in English.

Most-asked questions from foreign-founded startups, foreign-funded subsidiaries, and bilingual founders.

Q01

Do you support fully bilingual communication?

Yes. Email, video calls, and report deliverables can be provided in English. For complex legal documents (e.g. Articles of Incorporation, board resolutions), we coordinate with bilingual judicial scriveners and immigration lawyers.

Q02

Can you help me incorporate a Japanese KK or GK as a foreign founder?

Yes. We coordinate with judicial scrivener and immigration lawyer partners — Articles of Incorporation, capital contribution, registration, post-incorporation tax filings, and bank account opening guidance.

Q03

We are a US-headquartered SaaS opening a Japanese subsidiary. Can you help?

Absolutely. We support Japanese subsidiaries of US, UK, EU, Singapore, and Australian groups — bookkeeping, management reporting (consolidation-ready), tax filings, and intercompany transfer pricing.

Q04

Can you advise on stock option plans for foreign founders?

Yes. We design tax-qualified SO, paid SO, and trust-type SO for Japanese KK/GK with foreign founders. Our representative handled SO-related work at Deloitte Tohmatsu for TSE Prime-listed companies.

Q05

Can you support IPO preparation in English?

Yes. We provide J-SOX compliance, internal control framework setup, related party transaction analysis, and disclosure document drafting — coordinating with main underwriters in English.

Q06

How do we contact you?

Phone: 050-3628-3750 (Weekdays 10:00–18:00 JST). Office: Yokohama (Kanazawa-ku) or coordinated visits in Saitama / Tokyo / Kanagawa. Remote-first service available worldwide.

Sawaka Fukuda

Representative

Sawaka Fukuda

CPA & Tax Accountant (Zeirishi)

About Us

Iroae Tax Accountant Office
/ Iroae G.K.

Career

Deloitte Tohmatsu — Startup-focused Audit Practice → Founded Iroae in 2019

Concurrent Roles

CFO and Director (Generative AI Business) at SkillBridge Inc. / Outside Statutory Auditor of a space-tech venture

Address

1-7-13 Nishishiba, Kanazawa-ku, Yokohama, Kanagawa 236-0017, Japan

Service Coverage

Visit-based: Saitama / Tokyo / Kanagawa · Remote-first: Worldwide

Languages

Japanese (native), English (business-level)

Contact

Book a free 60-minconsultation in English.

Foreign-funded Japanese subsidiaries, foreign founders incorporating in Japan, foreign individuals with Japanese tax obligations — we are here to help.

Free 60-min Consultation050-3628-3750