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  4. Choosing Back-Office Outsourcing in Japan: Scope, Pricing and Handover

Choosing Back-Office Outsourcing in Japan: Scope, Pricing and Handover

事務代行サービスとは?依頼できる業務・料金相場・おすすめ比較

Published: 04/10/2026

Last Updated: 09/30/2026

Category: Side Jobs, Work Styles

Authors: Shusaku Yosa

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Before buying back-office support, list the tasks, monthly volume, expected hours and approvals that remain in-house. A low hourly price does not ensure less work if briefing and corrections take substantial internal time. Customer-facing service fees are not individual assistants’ pay. For the worker perspective, see the virtual assistant guide.

Separate execution from decisions

Task

Inputs to provide

Decision retained

Invoice preparation

Approved amounts, recipient and template

Billing and sending approval

Data entry or bookkeeping support

Records and defined processing rules

Unclear transactions and tax judgment

Recruitment scheduling

Availability, messages and owners

Selection and employment terms

Document or enquiry organization

Storage, categories and response examples

Exceptions and commercial commitments

The NTA explains reserved tax-professional services in Japan. Do not confuse routine input assistance with individual tax advice, tax representation or preparation of tax documents requiring an appropriately qualified provider.

Published Japanese service-price examples

Checked September 30, 2026. These offers do not have identical scopes. Confirm additional charges and eligibility in a written quote.

Service / plan

Hours per month

Monthly fee, tax included

Term

CASTER BIZ assistant BASIC

30

¥145,200

6 months

BASIC annual term

30

¥132,000

12 months

Fujiko-san PLAN20

20

¥68,640

1 month, automatic renewal

PLAN30

30

¥101,970

1 month, automatic renewal

Compare whether your tasks are accepted, overages, unused hours, setup, tools and cancellation notice. A year-long commitment and a one-month arrangement should not be judged on monthly price alone.

Prepare an operating procedure

Task and purpose: [ ]

Frequency and monthly volume: [ ]

Inputs and approved storage: [ ]

Steps: [1 → 2 → 3]

Completion criteria and checked example: [ ]

Exceptions and escalation contact: [ ]

Approver and deadline: [ ]

Access and retention period: [ ]

Start with one recurring process. Have the internal owner review a small completed batch, clarify the procedure and only then expand the work.

A first-month handover

Stage

Action

Check

Inventory

Separate execution and approval

Sensitive data and required access

Pilot

Run a small batch end to end

Acceptance and actual time

Routine work

Increase planned volume

Escalation and verification

Review

Assess time and corrections

Adjust scope and purchased capacity

Control access and assess value

  • Separate preparation from final payment authorization.
  • Use appropriate individual access and records rather than shared personal credentials.
  • Ask about subcontracting, AI tools, storage and overseas handling.
  • Measure completed volume, timeliness, rework and internal review time consistently.
  • Agree return of records and procedures and removal of access on exit.

Outsourcing is not automatically cheaper than employment. Compare total fees and retained management time alongside quality, continuity and the commitment you are making.

Related guides

  • Sales outsourcing: scope and payment terms
  • Social media outsourcing scope
  • Freelance contract terms

Related Otame4 guides currently link to Japanese pages.

Sources and further checks

Public information checked on September 30, 2026. Japanese official sources are linked below; verify current requirements for your situation.

  • CASTER BIZ assistant:公式サービス・料金
  • フジ子さん:公式サービス・料金
  • 国税庁:税理士業務について

 

 

 

 

Table of Contents

  1. Separate execution from decisions
  2. Published Japanese service-price examples
  3. Prepare an operating procedure
  4. A first-month handover
  5. Control access and assess value
  6. Related guides
  7. Sources and further checks

 

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