Masumi Hirayama

International Tax

Deloitte Tohmatsu Tax Co. Partner

Masumi Hirayama

Marunouchi Nijubashi Building

3-2-3 Marunouchi, Chiyoda-ku



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Certified Public Tax Accountant
After graduating from university, joined Tohmatsu & Co. (now Deloitte Touche Tohmatsu LLC) and provided auditing and internal control-related consulting services for primarily publically listed Japanese companies, then worked at Deloitte’s New York office from 2005 to 2007. In 2008, transferred to Deloitte Tohmatsu Tax Co.’s international tax department, and focused on international tax consulting for multinational Japanese corporations.

Coordinates with Deloitte offices overseas to provide comprehensive services regarding tax practices for outbound cross-border M&A projects, tax structuring, post-merger integration, group-wide restructuring, etc. for primarily Japanese corporations. Masumi also has a wealth of experience supporting corporations in handling tax ruling advice/support within and outside Japan for cross-border and other complex transactions. Furthermore, Masumi offers services that are customizable to a corporation’s business needs based on the project’s goals, etc. by coordinating with Deloitte’s other lines of business outside of tax.
In July, 2019, transferred to Deloitte & Touche LLP (Deloitte’s Singapore office) and is currently helping with a myriad of tax advisory projects based mainly in Singapore, but also including other Southeast Asian countries.
Masumi has also authored several accounting and tax-related publications in Japanese.

Masumi Hirayama