開業FinFin|スマホひとつで開業手続きが完了

Content rating
Everyone
100+
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Content rating
Everyone
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About this app

No more confusion! Complete your business registration in as little as 3 minutes by simply answering questions!
Submitting your "Business Registration Form" and "Blue Return Approval Application" can all be done with just your smartphone!
All basic functions, from using the app to creating and submitting necessary documents for business registration, are completely free!
"Business Registration FinFin" supports your first steps into entrepreneurship!

■ About "Business Registration FinFin"
【Business Registration Procedures Completed on Your Smartphone】
We provide guided support for creating multiple documents, such as the "Business Registration Form" and "Blue Return Approval Application" to the tax office. Electronic application is also supported, eliminating the need for printing or mailing.

【Even More Convenient When Combined with Accounting Management Apps】
After starting your business, you can utilize "Tax Return FinFin" and "Invoice FinFin" to handle everything from post-startup accounting management to invoice creation and tax filing. Factoring services and invoice payment services are also available, providing comprehensive support for business operations and cash flow management—all through your smartphone.

[Simple Design for Procedures in as Little as 3 Minutes]
Designed for those starting a business while working a side hustle or second job, it features a simple UI/UX that allows for smooth operation during weekday breaks or commutes.

[Browser Access Compatible]
"Kaigyo FinFin" offers a browser version accessible from PCs and tablets. Accounts are synchronized across all environments, ensuring smooth use even when switching between smartphones and PCs.

■ "Kaigyo FinFin" is recommended for:
・Those starting a business for the first time but unsure where to begin
・Those who want to start a small business in their spare time
・Those who want to start a business without visiting the tax office
・Those who want to quickly complete business preparations using only their smartphone
・Those who want to use accounting and invoice creation apps together
・Those who want to prepare for tax filing as a sole proprietor
・Those who want to complete business registration procedures for free

■ Supported Forms (List of Documents that can be Created)
・Notification of Commencement of Business for Sole Proprietors
・Application for Approval of Blue Return for Income Tax

Take your first step towards starting your business with "Kaigyo FinFin"!
Updated on
May 13, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Financial info
This app may collect these data types
Personal info, Financial info and 4 others
Data is encrypted in transit
You can request that data be deleted

What’s new

・その他軽微な修正を行いました。
引き続き「開業FinFin」をよろしくお願いいたします。
Content rating
Everyone
Learn more

App support

About the developer
KAIKEI BANK CO., LTD.
developer@finfin.jp
1-6-1, OTEMACHI OTEMACHI BLDG.FINOLAB CHIYODA-KU, 東京都 100-0004 Japan
+81 3-6824-5285