Nexpert

NEXPERT is a Tokyo-based group of accounting and finance professionals built around 税理士法人NEXPERT (a certified tax accountant corporation) and 株式会社NEXPERT Consulting. The group positions itself as a specialist in accounting, tax, bookkeeping, treasury and management services for startups, venture companies, investment funds and medical-sector clients. 税理士法人NEXPERT's stated business scope is tax advisory and tax consulting, while NEXPERT Consulting handles bookkeeping agency work, accounting outsourcing, and support for obtaining bank financing and government subsidies.

The published service catalogue spans startup advisory (combining accounting, tax, fundraising and labour matters), fund administration covering the accounting, tax and management operations of fund vehicles, company incorporation support, accounting outsourcing, fundraising consulting aimed at loans from Japan Finance Corporation and private banks, DX (digitalisation) support for back-office functions, IPO consulting led by certified public accountants, share valuation and financial/tax due diligence for M&A and financing transactions, inheritance and gift tax services, and one-off spot engagements without a continuing retainer. The group describes an affiliated network that includes a social insurance labour consultant corporation, Nexpert Advisory Inc., Nexpert Law Office, a judicial scrivener office, an administrative scrivener office, and 株式会社NEXVALUE, enabling combined accounting, legal and labour coverage.

The firm frames its market rationale around a gap between Japan's growing venture sector and a tax-accountant profession whose average practitioner age exceeds 60 and where more than 80% of offices employ five or fewer staff, arguing that such small practices struggle to cover the full range of accounting and tax issues arising as a company scales.

Founding story

The firm's stated founding rationale, set out by representative Keisuke Asari, is to bridge a gap between Japan's expanding venture ecosystem-driven by capital-requirement reform, more venture capital and angel investors, and technology change-and a tax profession dominated by small, ageing practices, by providing stage-appropriate accounting and tax services to venture management teams.

Business model

Professional-services model: recurring tax advisory and accounting/bookkeeping outsourcing retainers, supplemented by project-based engagements such as incorporation support, fundraising consulting, IPO preparation, share valuation and financial/tax due diligence, inheritance and gift tax filings, and one-off spot services for clients without a retainer contract.

Fees from ongoing advisory and outsourcing contracts plus project fees; engagements begin with a free initial consultation, followed by a proposal and quotation, an electronically executed contract, and a kickoff meeting.

Traction

Publicly stated indicators include inclusion in the 2025 professional-services industry ranking of 500 firms, a Money Forward Cloud Award 2025 nomination, a 2026 business alliance with Music Securities, and a staffed roster of representatives, managers and former tax-authority advisers.

Latest developments

On 2026-01-22 the group announced a business partnership with Music Securities, Inc., which provides financial services to growth companies. In late October 2025 it was listed in the 2025 industry ranking of professional-services firms and nominated for the Money Forward Cloud Award 2025.