Team

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Managing Partner

Takeshi Koike

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Certified Public Accountant

Takeshi graduated from renowned Tokyo University of Foreign Studies with a Bachelor of Foreign Studies (Korean Linguistics major). He started off his career with Samsung Japan and was engaged in corporate planning. He then built his career at Deloitte Tohmatsu as an international accountant. He has supported many major Korean companies at Deloitte.
In 2018, Takeshi founded Itseki Group.

Managing Partner

Kota Kosuge

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Certified Public Accountant

Kota graduated from renowned Hitotsubashi University with a Bachelor of Economics degree.
He built his professional career at Deloitte Tohmatsu and PwC, and was involved in many accounting/tax projects including..

- Financial audits of listed financial institutions (i.e. banks)

- Internal control consultation

- Tax due diligence


In 2018, Kota founded Itseki Group.

Managing Partner

Yuya Shimaoka

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Certified Public Accountant

Yuya graduated from Komazawa University and he started his career at Nagoya bank.In 2007, he joined Deloitte Tohmatsu and mainly involved in finacial audits of listed banks, REIT, insurance companies.In 2013, Yuya transferred to M&A advisory group and delivered financial due diligence, stock valuation and etc.In 2018, Yuya founded Itseki Group.

India Desk Partner

Ankit Jain

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Chartered Accountant

Ankit is a Bachelor in Commerce from University of Delhi and a fellow member of Institute of Chartered Accountants of India, New Delhi. He holds a Diploma in Information System Audit. He is also certified in IFRS and Forensic Accounting and Fraud Detection. He lately qualified with ICAEW as well.

Ankit worked with the Big 4 accounting firms (Pricewaterhouse Coopers India and Canada) and MNCs (American Express, India and Japan).

Ankit is a managing partner of Itseki Mercurius India Advisory Services Pvt., Ltd. and AJSH & Co LLP.

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Managing Partner

Toshiaki Susaki

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Certified Public Accountant

Toshiaki graduated from renowned Hitotsubashi University with a Bachelor of Commerce degree. He built his professional career as an international accounting/tax consultant at Deloitte Tohmatsu and PwC.
In 2018, Toshiaki founded Itseki Group.

He currently provides highly professional international services to both Japanese and foreign firms. He is bilingual in English and Japanese as he grew up in the U.S.

Managing Partner

Tomoya Shimada

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Certified Public Accountant

Tomoya graduated from Kyushu University with a Bachelor of Law degree.

He built his professional career at Deloitte Tohmatsu, and was involved in many accounting/tax projects including…

- Financial audits of various industries.

- Introduction of IFRS and US GAAP.

- Post Merger Integration

- Establishment of internal control system.

- Forensic accounting.

 In 2018, Tomoya founded Itseki Group.   

Managing Partner

Yoichi Hirano

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Certified Public Accountant

Yoichi graduated from Kyushu University and started his career at EY.
At EY, Yoichi experienced financial audits of listed manufacuturing companies and IT companies.
In 2013, Yoichi was seconded to a Reconstruction Support Organization for Companies Suffering Damage from the Great East Japan Earthquake, and provided business due diligence, financial due diligence and corporation revitalization advisory.
In 2014, he was seconded to Japan Ministry of Land, Infrastructure, Transport and Tourism, and leaded private finance initiative ("PFI") of airports.
In 2018, Yoichi founded Itseki Group.

India Desk Partner

Siddhartha
Havelia

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Chartered Accountant

Siddhartha is a Bachelor in Commerce from University of Delhi and a fellow member of Institute of Chartered Accountants of India, New Delhi. He is also certified in accounting software like QuickBooks, Xero, FreshBooks, Wave and Zoho Books. He lately qualified with ICAEW as well.

 

Siddhartha worked with Big 4 accounting firms (Pricewaterhouse Coopers India and Grand Thornton, India) and MNCs (American Express, India).

Siddartha is a managing partner of Itseki Mercurius India Advisory Services Pvt., Ltd. and AJSH & Co LLP.

Councel

Takashi Miyauchi

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Financial Specialist

Takashi graduated from renowned Osaka University with a Bachelor of Engineering Science degree.
After graduation, Takashi joined Fuji bank (current Mizuho bank).
Takashi then joined Deloitte Tohmatsu and became a partner in 2008.
He leaded risk management advisory services with his indepth knowledge of finance.
Takashi is take part in Itseki as a counselor.

Manager

Tomomi Sukegawa

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Certified Public Accountant

Tomomi graduated from the Faculty of Law, Keio University.
She joined Deloitte Touche Tohmatsu LLC, where she was in charge of statutory audits in the audit department.
After that, she took up the position of Accounting Manager at a financing company.
After joining Itseki Group, she has been engaged in accounting consulting and tax support.

Senior Associate

Ryo Hirayama

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Forensic Team

Waseda University, he worked as a management consultant specializing in small and medium-sized enterprises at Funai Research Institute, Inc. and provided marketing support mainly to the construction industry.  

As a consultant, he works to establish a "100-year company" that is aligned with the size and vision of the company by providing internal control and guidance and management of frontline employees to improve sales and marketing capabilities.

He joined Itseki in 2020 and engaged in forensic and accounting consulting services.

Associate

Mizue Howitt

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International Business Team

After graduating from university, she worked as an assistant controller for several foreign companies, integrating accounting systems and restructuring business processes.
She worked with various business partners to ensure that subsidiaries and branches were accounted for in accordance with local GAAP and IFRS/SOX.
Since joining Itseki in August 2020, she has been supporting the financial and accounting departments of mainly foreign companies.

Associate

Miyuki Hayashi

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Forensics Team

After graduating from university, she worked in the administrative departments of a consulting company and an IT venture company.
She was responsible for accounting, general affairs, labor relations, secretarial work, sales assistant and IT service launch.
With this experience, she is responsible for a wide range of services including digital forensics.

Adviser

Koji Matsui

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Certified Public Tax Accountant

After graduating from Kanazawa University's Faculty of Law and Literature, he joined the Tokyo Regional Taxation Bureau.

 

After about 20 years of experience in property tax administration at a tax office, he became an inspector of national taxation in the asset taxation department at tax offices in Chiba and Tokyo.

As an advisor to the Itseki Group, he reviews and advises on services related to business succession and inheritance tax.

Assistant Manager

Hitomi Komai

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Certified Public Accountant

After working at an airline company for four years, she joined EY.
She was in charge of auditing listed companies, and also experienced accounting education support for middle and high school students.
After joining Itseki, she has been engaged in accounting consulting services with the strength of the communication skills she developed as a ground staff member.

Senior Associate

Takaaki Tanobe

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CPA (US)

After graduating from the Faculty of Economics at Keio University, he worked for a construction consulting company where he was in charge of overseas business. He successfully completed a project in Mexico and a highway design project in Sri Lanka.
He joined Itseki in 2019 after obtaining his US CPA license.
He is currently responsible for a wide range of accounting advisory, audit and tax work.

Associate

Yume Kadowaki

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After graduating from university, worked at a major tax consulting firm.
After graduating from university, she worked at a major tax consulting firm, where she handled monthly processing, annual closing, payroll, and various tax returns, mainly for hospitals and other medical institutions.
After that, she gained experience at another tax consulting firm and joined Itseki in November 2020.
At Itseki, she is in charge of tax advisory services.

Back Office Manager

Mayumi Iwase

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General Affairs Team

She joined DIC Corporation, where she was responsible for accounting, the foundation of the back office operations, for 10 years.
She has been involved in accounting, finance, general affairs, and human resources for more than 30 years at listed companies and venture-backed companies.
As a member of Itseki in October 2019, she will be responsible for tax assistance, payroll, social insurance practice, and other back Engaged in office operations.