Now Open in Japan

Copper River Tax Japan

Professional US tax services for individuals in Japan. Our Japan branch provides localized support with services priced in Japanese Yen.

Our Services

Comprehensive US Tax Services

Whether you're a Japanese resident needing an ITIN, a US citizen living abroad, or a service member stationed in Japan, we have you covered.

ITIN Application Services

As an IRS-authorized Certified Acceptance Agent (CAA), we can process your ITIN application without you having to mail original documents to the IRS, avoiding the risk of international mail loss. We offer in-person document verification in Sapporo and Otaru, so even domestic mailing can be avoided.

  • In-person verification in Sapporo & Otaru
  • W-7 form preparation and submission
  • Application tracking until issuance
Learn more →
Notary & Apostille Services

New Jersey remote notarization with physical document stamping at our Japan branch. Fast apostille services with standard 7-day delivery or super expedited 72-hour hand delivery to major Japanese cities.

  • NJ remote notarization with physical stamp
  • Apostille with 7-day standard delivery
  • 72-hour hand delivery available
Learn more →
EIN Application Services

Fast US EIN application service for Japanese individuals and entities. Get your Employer Identification Number with our 48-hour guarantee or receive a full refund.

  • 48-hour EIN guarantee
  • Form 8832 entity classification
  • Full refund if delayed
Learn more →
US Nonresident Tax Filing

For Japanese residents with US-source income such as investments, rental properties, or business income. We ensure proper treaty benefits are applied.

  • Form 1040-NR preparation
  • US-Japan tax treaty optimization
  • Investment income reporting
US Expat Tax Services

Comprehensive tax services for US citizens and green card holders residing in Japan, including all available exclusions and credits.

  • Foreign Earned Income Exclusion (FEIE)
  • Foreign Tax Credit optimization
  • FBAR and FATCA compliance
Learn more →
US Military Personnel

To honor the service of US military members stationed in Japan, we offer 50% off all tax services.

  • 50% discount on all services
  • Understanding of military tax situations
  • Flexible scheduling for service members
Learn more →
Japan Branch Opening Promotion

ITIN Application Service

As an IRS-authorized Certified Acceptance Agent, we offer ITIN applications with in-person verification in Sapporo & Otaru. Special promotional pricing available.

US Document Authentication

Notary & Apostille Services

New Jersey remote notarization with physical document stamping in Japan. Fast apostille services with 7-day standard delivery or 72-hour hand delivery to major Japanese cities.

View Notary Services Super expedited: 72-hour hand delivery
Japan Branch Promotion

EIN Application Service

Fast US EIN application for Japanese individuals and entities. 48-hour guarantee with optional Form 8832 entity classification election.

View EIN Service & Pricing 48-hour guarantee or full refund
US Expat & Military Services

Living in Japan? We've Got You Covered

Comprehensive tax services for US citizens, green card holders, and military personnel stationed in Japan. FEIE, foreign tax credits, FBAR/FATCA compliance, and special military discounts.

View Expat Services Military personnel: 50% off all services

Japan Branch Pricing

All services provided by our Japan branch are priced in Japanese Yen (JPY), making it easier for clients in Japan to budget and pay for services without currency conversion concerns.

Priced in JPY

Competitive local rates

Why Choose Us

Local Support, Global Expertise

Japanese Language Support
Japanese-speaking interpreter services are available by reservation. Schedule ahead to ensure seamless communication during your consultation.
Bank-Grade Security
All communications through our proprietary chat system are protected with AES-256 bit encryption, ensuring your sensitive tax information remains confidential.
Local Japan Branch
Our dedicated Japan branch team understands both US tax law and the local context, providing personalized service tailored to your situation.
Secure Communication
Use our encrypted messaging platform for all document submissions and communications. No need for unsecured email or physical mail.

Ready to Get Started?

Schedule a consultation with our Japan branch team. Japanese interpreter services available upon request.