MBS Inc.

We, MBS Inc., provide our professional outsourcing service in accounting, finance, tax consulting and other administrative fields. As professional CPAs and licensed tax accountants who have rich experiences in international business, MBS supports our clients to concentrate their limited resource on their core activities and reasonably mitigates their internal control risks.

Our outsourcing service


  • Bookkeeping
  • Monthly and annual closing
  • Reporting(Japanese GAAP, US GAAP, IFRS)


  • Cash disbursement
  • Cash flow management
  • Supports in communication with banks

Tax consulting

  • Tax filing
  • Tax planning


  • Managerial accounting
  • Budgeting and budget control

Other administrative

  • Payroll service
  • HR(Hiring etc.)
  • Company start up
  • Supports in communications with Headquarter and group companies overseas

Concierge service for expatriates

  • Relocation and home finding support
  • Settling in assistance

Company profile

CEO Arata Horiguchi
Founded July 18th, 2008
2-13-1 Akasaka, Minato-ku,
Tokyo 107-0052 Japan
Tel 03-6277-0079
Fax 03-6631-0497

Team profile

Arata Horiguchi, CEO

BA(Waseda University), MBA(The University of Chicago)

After graduated from Waseda University, Horiguchi worked for an international division of Deloitte Touch Tohmatsu. With his experiences as a management consultant at Boston Consulting Group after gaining MBA at The University of Chicago, he worked as Director for Palace Capital K.K., a private equity investment fund of MUFG which is one of the largest financial institutions worldwide. Before joining MBS, he managed a frozen food manufacturer, one of Palace’s portfolio companies, for four years as CEO.

Seiki Gon

BA(Shopia University), MBA(Depaul University), CPA, Lisenced Tax Accountant

Gon joined Dentsu Inc. which is one of the world largest advertising agencies with 4 year experience as an auditor at Deloitte Touche Tohmatsu. She worked for Dentsu’s IPO project and group management projects. After Dentsu, she established her own accounting firm which spun-off MBS in 2008.