Nippon Reduces Invoice Processing Workload by 6,800 Hours Annually Using "Bill One" Accounting AX Service

Sansan Inc., a provider of AX services that transform the way people work, announces the case study and results of Nippon Corporation's (hereinafter, Nippon) utilization of its accounting AX service, "Bill One."

Nippon, which operates in the flour milling and food business, receives over 70% of its invoices, primarily at its factories, in paper form and manages them by scanning and digitizing each one. In November 2023, Nippon implemented Bill One, establishing an environment where site personnel at 30 locations nationwide can receive and centrally manage invoices online. By digitizing 36,000 paper invoices annually and reducing workload by 6,800 hours, Nippon has fostered an environment where employees in sales, factories, and back-office operations can concentrate more on their primary duties.

■Background of Bill One Implementation

Nippon has branches, sales offices, and factories nationwide, primarily engaged in the flour milling and food business. To comply with the Act on Electronic Bookkeeping and Tax System, which became mandatory from January 2024, Nippon had introduced a dedicated cloud service for digitizing invoices and receipts and was promoting company-wide paperless operations. However, the conventional cloud service alone did not eliminate the remaining tasks of receiving paper invoices, scanning them, and downloading invoice PDFs attached to emails, leaving site personnel burdened.

Against this backdrop, Nippon decided to implement Bill One to fundamentally eliminate the task of receiving invoices and create an environment where the entire company could focus more on its core operations.

■Post-Implementation Operations and Results

Bill One enables centralized online management by proxy-receiving invoices sent by business partners through various means and formats (mail, email, etc.) and digitizing them with 99.9% accuracy (*1). By utilizing Bill One, Nippon has eliminated the need for site staff at 30 locations nationwide to receive paper invoices, creating an environment for online receipt and management, leading to the following achievements:

- Reduced workload by 6,800 hours, creating an environment for the entire company to focus on core operations

By switching the monthly receipt of 3,000 invoices to online receipt via Bill One, the significant burden of paper invoice reception, scanning, and downloading email-attached invoice data previously handled by site staff has been eliminated. Furthermore, by allowing site employees and accounting staff to confirm and correct invoices through a shared Bill One screen, communication costs have been reduced. This has resulted in an annual reduction of 6,800 hours spent on invoice processing, fostering an environment where employees across sales, factories, and back-office operations can concentrate more on their primary duties.

■Ryoma Washio, Accounting Group, Accounting and Finance Department, Nippon Corporation

"Our company has been promoting DX for invoice processing and expense settlement since 2023, driven by the need to reduce company-wide indirect costs and comply with the Act on Electronic Bookkeeping. However, asking thousands of business partners to switch from paper invoices to electronic ones posed a significant challenge due to the burden it would place on them. Bill One allows us to handle everything from proxy receipt of invoices to digitization simply by having business partners change the invoice destination address to a dedicated one. This made it possible for us to eliminate the need to receive paper invoices ourselves, dramatically advancing our paperless initiatives. To ensure company-wide effectiveness, we focused on motivating Bill One adoption by calculating and visualizing the online receipt rate in each department. As a result, we've seen over 90% paperless processing in factories, which handle a large volume of invoices, and online receipt is becoming the norm for us. Currently, Bill One is used by our company and several group companies, and we aim to further improve operational productivity across the entire Nippon Group by expanding its deployment to domestic and international group companies in the future."

■Nippon Corporation Company Overview

Company Name: Nippon Corporation
Representative: Toshiya Maetsuru, President and Representative Director
Founded: September 1896
Business Activities: Flour milling, food products, etc.
Number of Employees: 3,863 (as of March 31, 2025)
URL: https://www.nippn.co.jp/index.html

*1: Data digitization accuracy when conditions defined by Sansan Inc. are met.

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■"Bill One": Creating "Elimination" and Transforming Company-Wide Work Styles

Bill One, provided by Sansan Inc., is an accounting AX service that solves various business challenges such as invoice reception, expense settlement, and accounts receivable management. By creating "elimination" in company-wide business processes involving evidentiary documents like invoices and receipts through the power of AI and technology, it transforms the work styles not only of the accounting department but of the entire company.

https://bill-one.com/

■Sansan Inc. Company Overview

With a mission to "Create Innovation from Encounters," Sansan Inc. provides AX services that transform the way people work. Its main services include the business database "Sansan," the business card app "Eight," the accounting AX service "Bill One," the contract management service "Contract One," and data quality management "Sansan Data Intelligence," offered both domestically and internationally.

Established: June 11, 2007
URL: https://jp.corp-sansan.com/
Location: Shibuya Sakura Stage 28F, 1-1 Sakuragaoka-cho, Shibuya-ku, Tokyo 150-6228
Capital: 7.35 billion yen (as of February 28, 2026)
Business Activities: Planning, development, and sales of AX services that transform work styles
Sansan: https://jp.sansan.com/
Eight: https://8card.net/
Bill One: https://bill-one.com/
Contract One: https://contract-one.com/
Sansan Data Intelligence: https://jp.sansan.com/sansan-data-intelligence/