No More Manual Journal Entry: MoMo Launches AI-Powered SaaS 'Shiwake Musou' for Accounting Firms

MoMo Co., Ltd. (Headquarters: ONE FUKUOKA BLDG. 7F, 1-11-1 Tenjin, Chuo-ku, Fukuoka City, Fukuoka Prefecture; CEO: Shou Ito) has launched 'Shiwake Musou', an AI-powered SaaS platform designed for accounting firms, integrating automated journal entry processing with client management.

By simply photographing and uploading receipts and invoices, OCR and AI automatically identify the counterparty name, amount, account code, tax classification, and description, instantly generating journal entry suggestions.

The system becomes more accurate over time, transforming tacit knowledge previously held only in senior staff's minds into institutional assets shared across the firm.

No changes to your existing accounting software are required, and there are no initial setup fees or cancellation charges.

Challenges Facing Accounting Firms — Structural Issues in Bookkeeping Outsourcing

Amid worsening labor shortages and recruitment difficulties, bookkeeping outsourcing workloads are increasingly straining accounting firm operations.

This is not merely a matter of workload volume, but stems from deep-rooted structural issues in how work is conducted, undermining both productivity and quality.

These structural challenges can be summarized into four main areas:

① Rules Exist Only in Individual Employees’ Minds

Each client has unique journal entry rules—such as account classifications and memo entries—that are often undocumented and stored only in individual employees’ memories.

Without formal manuals, new staff must relearn these rules from scratch during handovers, requiring significant time and cost to reach proficiency.

② Quality Deteriorates When Personnel Change

When experienced staff retire or transfer, the accumulated expertise and know-how built over years are instantly lost, as this knowledge resides only in their minds and is difficult to transfer.

Successors are forced to figure things out on their own, leading to increased errors and missed checks. This causes significant variation in bookkeeping quality depending on the staff member, eroding client trust.

③ Client Information Is Scattered Across Multiple Tools

Basic information is in Excel, notes are in memos, and communications are in emails—client-related data is fragmented across multiple tools, making it difficult to retrieve when needed.

This slows down verification processes and increases the risk of overlooking critical deadlines such as fiscal year-ends or tax filing dates, potentially leading to missed actions or mistakes.

④ Repetitive Data Entry Hinders Staff Retention and Skill Development

The monthly influx of large volumes of journal entries creates significant psychological stress for staff, contributing to overtime and pressure to avoid errors.

Staff cannot dedicate sufficient time to high-value activities such as tax consulting and business advisory services. Being trapped in repetitive tasks becomes a factor in employee turnover.

Shiwake Musou comprehensively solves these issues: 'institutionalized rules', 'quality decline due to staff changes', 'fragmented client information', and 'repetitive data entry'.

What is 'Shiwake Musou'? — More Than Just Automation: A Firm-Wide Operational Infrastructure

Shiwake Musou is not merely a 'journal entry automation tool'—it is an operational platform for accounting firms that integrates AI-powered journal entry with client management. By simply taking and uploading receipts and invoices, journal entries are completed, and the AI evolves over time into a dedicated virtual staff member for each client.

The journal entry workflow consists of just four steps:

Upload — Clients upload receipts, invoices, and statements to a shared folder

AI Journal Entry Generation — AI learns each client’s rules and past correction history to automatically generate accurate journal entries

Review and Correction — The firm reviews and corrects AI-generated entries; the AI learns from these corrections to improve accuracy next time

AI Growth — The AI becomes smarter over time, evolving into a dedicated AI staff member for each client

There is no need for manual dictionary registration such as 'if this word appears, use this account code.' The AI automatically learns from each client’s historical data and correction history.

Key Features

Category

Feature

Description

AI Journal Engine

AI Journal Automation

Automatically generates journal entry suggestions from receipts, invoices, and statements. Automatically infers descriptions and consumption tax classifications from context.

AI Journal Engine

Client-Specific Rule Learning

Learns from correction history to continuously improve journal accuracy for each client.

AI Journal Engine

Evidence Highlighting

Highlights on-screen where extracted values appear on the document, reducing visual verification burden.

AI Journal Engine

Data Integration & Alert Management

Centrally monitors import status, error notifications, and last successful import time. Automatically alerts for approaching fiscal periods, unimported data, or frequent errors.

Client Management

Client Information Management

Centrally manages basic information, contracts, assigned staff, and contact details.

Client Management

Tax and Fiscal Information

Aggregates fiscal year-end dates, interim tax filings, consumption tax classifications, and prior-year figures.

Client Management

Interaction History & Logs

Stores all meeting notes, decisions, and to-do items, ensuring knowledge and expertise are retained even when staff change.

Four Reasons Why Accounting Firms Can 'Go Unstoppable' with Shiwake Musou

Just take and upload — AI handles the journal entry.

Simply photograph and upload receipts and invoices, and OCR + AI instantly generates journal entry suggestions. Staff are freed from manual data entry.

Instant visual verification — see exactly where data was extracted.

The document image and AI-generated journal entry are displayed side by side, enabling verification and confirmation in just one second without shifting your gaze.

Smarter with every use — AI grows with each client.

The AI learns client-specific rules from correction history, continuously improving journal accuracy.

Graduate from Excel spreadsheets — centralize client information.

Centrally manage everything from basic information to interaction history. Since your current accounting software remains unchanged and only the upstream process is automated, implementation barriers are low.

Seamless integration with major accounting software

Journal data can be exported in CSV format tailored to your accounting software and imported directly. Compatible with major platforms including YAYOI Accounting, TKC, Money Forward, freee, JDL, and Kanjo Hougan (with more to be added). You can automate the upstream process without replacing your existing accounting software.

Quantifying the Impact of Implementation

Effect

Details

80% reduction in journal entry time

Client-specific rule learning improves accuracy over time, drastically reducing manual work.

Zero-day handover

Since knowledge is systematized, quality remains consistent even when staff retire or transfer.

Doubled order capacity

With AI handling routine tasks, smaller teams can serve more clients, enabling growth without relying on hiring.

For an accounting firm serving around 300 clients, this translates to approximately 2,400 hours of annual journal entry time saved.

This could result in cost savings equivalent to about 4.8 million yen.

※ Internal estimate: 5 hours per client per month, 80% reduction, at a rate of 2,000 yen per hour

How Shiwake Musou Differs from Other AI Journal Tools — Transforming Not Just Entries, But Entire Operations

Reliable Design and Implementation Support

Fully compliant with revised Electronic Recordkeeping Law: Automatically meets scanner storage requirements, including timestamping and preservation of resolution and tonal information.

Robust implementation support: Dedicated consultants provide end-to-end support from kickoff and current-state analysis to staff training and chat/Web meeting assistance.

Eligible for subsidies: Designed to qualify for the 2026 Digitalization and AI Adoption Subsidy under the 'Invoice Framework' (details subject to consultation).

Pricing Plan

Simple pay-per-use model. All features included in one plan. No initial setup fees or cancellation charges.