Professional Services We Provide

To meet the diverse needs of companies expanding into the United States, as well as American businesses entering and operating in Japan, we offer a comprehensive range of professional services, including company formation, accounting, taxation, payroll processing, and financial consulting. Our experienced professionals provide integrated, cross-border support to help drive our clients' growth, ensure efficient business operations, and facilitate successful expansion in both the U.S. and Japanese markets.

Expanding Your Business to the U.S.

We have years of experience in supporting businesses to grow internationally. There are variety of considerations to keep in mind when entering the U.S. market. We will help you to create and maintain a company in the U.S. and advice you for its successful business.

Accounting & Payroll Outsourcing

A U.S. Certified Public Accountant (CPA) will take the lead and help you with your accounting work and Preparing payroll and keeping up with the latest labor laws consume time better spent on your core business activities. Let us handle your payroll and HR needs.

Tax & CPA Services

Our experienced tax experts are ready to offer you assistance in the following areas to maintain your compliance with your statutory return, disclosure and documentary obligations – and even more than that.

One-Stop Support for U.S. Business Expansion

Our bilingual Certified Public Accountants and team of professionals, with extensive knowledge of both the U.S. and Japanese business environments, provide comprehensive support from market entry and business operations to the execution of growth strategies in the United States. As your trusted partner, we enable you to focus on your core business while helping drive your success and sustainable growth in the North American market.

Customer Success Stories

Customer Success Stories

Virtual Office Support

Our client, a successful Japanese medical equipment manufacturer, needed to compete locally in an increasingly competitive U.S. market.

The Problem

U.S. sales were declining due to increasing competition from local traders and manufacturers.

Expatriate Payroll Processing

Our client, a holding company with 30 expatriates and three local employees was suffering under the burden of complicated payroll processing. Japanese salaries and non-monetary salaries had to be grossed up along with U.S. salaries.

The Problem

Our client needed to perform gross-up calculations on salaries, allowances, and non-monetary benefits while in the U.S. This operation was being handled by a human resources representative from Japan but he needed support. Additionally, the company wanted to keep expatriate salaries confidential.

Accounts Payable (AP) and Accounts Receivable (AR) Accounting

Our client’s senior management was seeking ways to handle their accounting department’s AP and AR functions in a more cost-effective, centralized, and efficient way.

The Problem
  • As a large-scale business, AP and AR functions were segregated and inefficiently spread out among multiple employees.
  • Our client was in the costly situation of having more than 10 employees handling AP and AR.

About POSI

POSI is an international accounting firm with offices in the United States, Mexico, and Tokyo. Leveraging advanced expertise in accounting, taxation, and finance, as well as extensive experience in cross-border business support, we help Japanese companies achieve success and sustainable growth in the North American market.

Impact by Numbers

30+

Years of Experience Supporting Clients in the U.S.

Entity Clients

Individual Tax Clients

Professional Staff

CPAs &Licensed Professionals

Download Our Service Brochure

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Download our PDF brochure.