RSM Shiodome Partners is the Japan member firm of RSM International, one of the world’s leading audit, tax, and consulting networks with more than 900 offices across 120 countries. With direct access to this global platform, we deliver practical, highquality solutions backed by the latest technical knowledge and a deep understanding of international business. Our goal is to help clients navigate increasingly complex crossborder challenges with clarity and confidence.
Whether a Japanese company is expanding into Europe or a European company is entering the Japanese market, the journey involves navigating unfamiliar regulations, business customs, and operational expectations. Differences in language, legal frameworks, and corporate culture can quickly become obstacles to smooth market entry and sustainable growth.
Our Europe Desk was created to bridge these gaps. By working in English and collaborating closely with RSM member firms across Europe, we provide coordinated, endtoend support for both inbound and outbound clients. From initial market entry to ongoing operations, we help businesses establish, operate, and grow with greater speed, certainty, and strategic insight.
Our Services
Accounting and Business Support
Bookkeeping and payment processing
Accounting and financial closing services
Preparation of statutory financial statements
Accounting advisory
IFRS and US GAAP conversion
Tax Services
Tax advisory
International tax advisory
Transfer pricing consulting
Tax risk management
People Advisory and Payroll
Labor advisory
Payroll calculation
Social insurance procedures
Legal and Administrative Support
Legal advisory
Company establishment
Visa and residence status applications
Corporate registrations and licensing
Financial Advisory
Financial due diligence
Stock valuation
Business valuation
Audit and Assurance
Statutory audits
Voluntary audits
Agreed‑upon procedures (AUP)
Fraud investigations
Meet Our Consultants

Jun Kurozumi
International Contact Partner
Jun started his career as a professional translator before he landed a job in accounting for BDO Tax Co. He was given the opportunity to work as a consultant for foreign affiliated companies before ultimately taking on corporate management roles for clients like H&M and Volvo as an outsourcing certified public tax accountant and personnel/ labor manager. After joining Shiodome Partners Group in 2012, he now leads our international team for both outbound and inbound clients.

Bernhard Michio Flasar
Manager
After graduating from universities in Austria and gaining experience in business companies in both Austria and Japan, Bernhard Michio Flasar joined Nakai Immigration Services LPC in 2006. With over 18 years in the field, he has cultivated extensive knowledge and expertise in immigration services, particularly residency status procedures. He is highly proficient in Japanese, English, and German, enabling him to provide high-quality, fully bilingual immigration consulting services to a wide range of foreign-affiliated clients, with a particular focus on European and Japanese companies. Effective July 2025, he will assume the role of Manager at RSM Shiodome Partners AS Co. following a merger.

Jonas Ceulemans
Consultant
Jonas Ceulemans specializes in international tax and cross‑border advisory, with a focus on supporting both European companies entering Japan and Japanese companies expanding into Europe. He began his career at RSM Belgium in 2018, where he gained extensive experience in corporate tax compliance, advance ruling applications, tax due diligence, international tax structuring, and corporate reorganizations across a wide range of industries.