Company Overview
Message
As a partner that supports the sustainable growth of companies, we will also continue to change and progress, and we want to be "an existence that continues to be chosen."
Handling company cash and payroll is too critical to entrust to just anyone.
It’s a strategic loss when key executives are diverted by billing, payroll, and payment processing, unable to focus on core strategy and sales.
That’s why we launched our Shared Administration Department Service.
We allow you to “share” an expert administrative team.
Composed of members with extensive experience in administration departments at various operating companies, including listed firms, we deeply understand the practical processes required to run an efficient administrative function.
Our goal is to transform the cost-center administration department into a shared resource, enabling you to fully focus on business expansion. We commit to continuous evolution, pursuing the most accurate and swift system for service delivery.
Shared Admin
CEO
Masaki Kogawachi
Outline
Business Name
Shared Admin
CEO
Masaki Kogawachi
Establishment
January 1994
Capital
30 million yen
Location
ZIP: 163-0928 Shinjuku Monolith, 28th Floor 2-3-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo
Bussiness Activities
Providing Share Management® services, an outsourcing solution for administrative department operations
MEMBER
Masaki Kogawachi
December 2023
Shared Admin
April 2025
Shared Admin CEO
Kazuki Hida
December 2007
Joined Tohmatsu & Co. (now Deloitte Touche Tohmatsu LLC).
Engaged in operations including Financial Statement Audit, IPO Audit, Internal Control Audit, and Financial Due Diligence.
June 2011
Earned an MBA (Master of Business Administration in Global Management) from Thunderbird School of Global Management in December 2012.
January 2013
As the Representative of Hida Certified Public Accountant Office (now Sherpa Tax Corporation), I engaged in operations including Corporate Taxation, International Taxation, and IPO Support.
December 2016
As Director, CFO, and General Manager of Administration at AI inside Inc. (Securities Code: 4488) until August 2018, I led the foundational establishment of the entire administrative and governance structure, including internal controls and board management, successfully facilitating the company's IPO on TSE Mothers in December 2019.
November 2019
Launched the Shared AdminDepartment Service at Shared Admin.
Access
Shared Admin
ZIP: 163-0928
Shinjuku Monolith, 28th Floor
2-3-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo
Business Hours／Weekdays 9:00 AM – 6:00 PM