プレビュー · 社内レビュー用
Iroae
30分無料相談

Bilingual · Yokohama-based · Worldwide Remote

日本で働く、
日本で起業する。

English Tax Service.

外資系日本子会社・日本で起業する外国人創業者・在日外国人個人事業主のためのバイリンガル税務サービス。

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

Free 30-min Consultation050-3628-3750

Weekdays 10:00–18:00 JST · 平日10:00〜18:00

Indicative Pricing

JPY only

  • Individual / Year

    個人所得税申告

    96,000円〜

  • Corporate / Year

    法人税申告

    110,000円〜

  • Monthly Retainer

    月次顧問

    16,000円〜

  • Monthly Bookkeeping

    月次記帳

    15,000円〜

Trust Credentials · 信頼バッジ

CPA + Tax Accountant

公認会計士＋税理士

Both licenses held

freee 4-Star Advisor

freee 4つ星認定

3 freee experts on staff

METI-certified

経営革新等支援機関

Oct 2025 certified

AI Director

生成AIベンチャー取締役

Hands-on AI implementation

Who We Serve · 対象

Three
Audiences.

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

3つの対象──外資系日本子会社／日本で起業する外国人創業者／在日外国人個人事業主。

01

Foreign-funded Japanese Subsidiaries

外資系日本子会社（KK・GK）

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

日本で起業する外国人創業者

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

日本で納税義務がある外国人個人

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

Why Iroae for Foreign Clients

Founder's
Five Layers.

代表 福田 彩和佳の経歴と現任の5項目。

CPATax AccountantActive CFOOutside AuditorAI Director

Services & Pricing · 料金

Transparent,
all in JPY.

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

※消費税別。最終料金は取引量・複雑性・言語要件により個別見積。

Individual

個人向け

  • Personal Income Tax Filing

    ★

    個人所得税申告

    96,000円〜

    From 96,000 JPY/year

  • Inhabitant Tax

    住民税申告

    申告に含む

    Included

  • Foreign Tax Credit

    外国税額控除

    30,000円〜

    From 30,000 JPY/year (add)

  • Inheritance / Gift Tax

    相続税・贈与税

    個別見積

    Project-based

Corporate

法人向け

  • Corporate Income Tax (KK/GK)

    ★

    法人税申告

    110,000円〜

    From 110,000 JPY/year

  • Consumption Tax incl. reverse-charge

    消費税申告

    30,000円〜

    From 30,000 JPY/year (add)

  • Local Taxes

    地方税

    申告に含む

    Included

  • Year-end Adjustment (up to 5)

    年末調整（5名まで）

    30,000円〜

    From 30,000 JPY/year

Most Popular

Monthly

月次顧問

  • Monthly Tax Advisory (Bilingual)

    ★

    月次顧問（バイリンガル）

    月額16,000円〜

    From 16,000 JPY/month

  • Bookkeeping (English COA)

    ★

    月次記帳（英語COA）

    月額15,000円〜

    From 15,000 JPY/month

  • English Management Reporting

    英文月次レポート

    月額30,000円〜のティアに含む

    Included from 30,000 JPY/m

  • API Integration Support

    API連携支援

    個別見積

    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.

外国人創業者・外資系日本子会社向けのCFO代行・IPO準備支援トラック。

Track 01

Series A〜B Outsourced CFO

シリーズA〜B 外部CFO

Active CFO of SkillBridge Inc. (50,000,000 JPY raised from Asmarq) leads your fundraising, cap table, and investor reporting — in English.

Details (Japanese): /cfo

Track 02

IPO-Readiness Consulting

IPO準備コンサルティング

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

Details (Japanese): /ipo

Track 03

Internal Audit

内部監査

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

Details (Japanese): /audit

Frequently Asked Questions

FAQ
in English.

Most-asked questions from foreign-founded startups, foreign-funded subsidiaries, and bilingual founders. For Japanese-language Q&A, see /qa.

Q01

Do you support fully bilingual communication?

完全バイリンガル対応は可能ですか？

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?

外国人創業者として日本でKK／GKを設立できますか？

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?

米国本社のSaaSが日本子会社を開設します。対応可能ですか？

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?

外国人創業者のSO設計を支援できますか？

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?

IPO準備を英語でサポートできますか？

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?

お問い合わせ方法は？

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 · 事務所概要

Iroae Tax Accountant Office
／ Iroae G.K.

Career

経歴

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

監査法人トーマツ（スタートアップ専門部隊・上場準備企業担当）→ 2019年Iroae設立

Concurrent Roles

兼任

AI Venture Director / Outside Auditor at Pale Blue Inc. / CFO at SkillBridge Inc.

生成AIベンチャー取締役／Pale Blue 社外監査役／スキルブリッジ CFO

Address

所在地

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

〒236-0017 神奈川県横浜市金沢区西柴1-7-13

Service Coverage

対応範囲

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

訪問：埼玉・東京・神奈川／遠隔：海外含む全国対応

Languages

対応言語

Japanese (native), English (business-level)

日本語（ネイティブ）／英語（ビジネスレベル）

お問い合わせ

Book a free 30-minconsultation in English.

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

外資系日本子会社・外国人創業者・在日外国人個人事業主の方へ。

Free 30-min Consultation050-3628-3750