ICHIYAMA ACCOUNTING OFFICEJapanese CPA · Ginza, Tokyo

JAPANESE CPA / GINZA, TOKYO

When your finance team needs more than advice.

Lease accounting implementation, closing and consolidation, and financial information verification. A CPA with audit and consulting experience designs the work and manages quality, while specialist staff help carry it through.

Discuss your needs ↗ Find your starting point ↓

You can contact us before deciding the precise scope.

JAPAN’S NEW LEASE ACCOUNTING STANDARD

Prepare for
1 April 2027.

ASBJ Accounting Standard No. 34 applies to annual and consolidated annual periods beginning on or after this date. For a March year-end, this means the year starting in April 2027.

From collecting scattered contracts to AI-assisted initial assessment, CPA review and continuing lease administration.

Explore implementation support ↗
Since 2007Audit and consulting experience
10+ yearsExperience as an audit in-charge
Across industriesManufacturing, trading, medical, IT, PFI and more
Accounting + ITAccounting system implementation experience

LEASE ACCOUNTING

From contracts to closing

Process overview
  1. Scope the investigationLedgers, site questions and priorities
  2. Collect and extractAI-assisted contract reading and initial assessment
  3. Review significant issuesCPA checks against source records
  4. Prepare for reportingRegister, calculations and operating rules

Illustrative workflow. The scope and deliverables are agreed for each engagement.

Contract analysis uses settings that exclude client documents from AI model training. We agree the documents and purpose before using AI.

Lease implementation support ↗

Keep the work running after adoption.

New and changed contracts, register updates, monthly right-of-use asset and liability calculations, and closing and disclosure schedules can be entrusted as recurring work.

Recurring lease administration ↗

WHY OUR OFFICE

CPA expertise, with a team that does the work.

Records that help discussions with auditors

Our representative spent 12 years in audit and consulting at an audit firm. We prepare supporting records with the questions auditors ask in mind.

Practical execution as well as advice

A CPA and specialist staff undertake agreed calculations, preparation and contract investigation when your team needs capacity.

Technology for efficiency; professional oversight

AI and systems assist reading and reconciliation. CPAs consider significant accounting issues, design the work and manage quality.

FEES

Indicative lease support fees

Implementation

From JPY 800,000

Approximately 20 mainly standard contracts.

Monthly administration

From JPY 30,000 / month

Up to 20 total contracts in the register.

Annual-only administration

From JPY 150,000 / year

Up to 20 total contracts in the register.

Excludes tax. Assessment of new or changed contracts is charged separately. Other conditions and the formal scope apply.

Full fee guide and conditions ↗

OUR REPRESENTATIVE

Manabu Ichiyama

Manabu Ichiyama, Japanese CPA

CERTIFIED PUBLIC ACCOUNTANT (JAPAN)

Audit experience followed by consulting in accounting, business processes and systems. Work includes standalone and consolidation systems, management and cost accounting, internal controls and IFRS implementation.

Established ICHIYAMA ACCOUNTING OFFICE in 2019; co-founder and Representative Director of 株式会社CP ARCS. Expected representative of CP ARCS はじめ監査法人, planned for establishment in 2026.

Career, experience & office details ↗

INSIGHTS

Practical insights

Explanatory articles are currently in Japanese. The English insights page explains where to find them.

View the article information ↗

GETTING STARTED

From conversation to the first work

Process overview
  1. Share the challengeWork, current situation and timing
  2. Review our proposalDeliverables, responsibilities, dates and fees
  3. Agree and startInitial setup and agreed work

Illustrative workflow. The scope and deliverables are agreed for each engagement.

Frequently asked questions ↗

LET’S TALK

Let’s work out your next step.

You do not need a finalized brief. Start with the challenge or the work you would like to entrust.

Discuss your needs