--- title: kozutumi Help Center description: kozutumi Help Center --- [Skip to content](https://support.kozutumi.com/en#main-content) - [English](https://support.kozutumi.com/en) - [日本語](https://support.kozutumi.com) English Show submenu for translations [![b4ed27a4bfc79764ef9e7bb445d8069c9a32566c](https://support.kozutumi.com/hs-fs/hubfs/b4ed27a4bfc79764ef9e7bb445d8069c9a32566c.gif?width=260&height=37&name=b4ed27a4bfc79764ef9e7bb445d8069c9a32566c.gif)](https://support.kozutumi.com/?hsLang=en) - ホーム - 製品 - 価格 - ブログ - 会社 Open main navigation Close main navigation - ホーム - 製品 - 価格 - ブログ - 会社 - - [English](https://support.kozutumi.com/en) - [日本語](https://support.kozutumi.com) English Show submenu for translations - [Contact us](https://kozutumi.com/contact-customer-en) [Contact us](https://kozutumi.com/contact-customer-en?hsLang=en) Please enter your question below. - There are no suggestions because the search field is empty. ### [Getting Started How to set up your account](https://support.kozutumi.com/en/getting-started?hsLang=en) - [How to create an account](https://support.kozutumi.com/en/how-to-create-an-account?hsLang=en) - [If you cannot create an account](https://support.kozutumi.com/en/if-you-cannot-create-an-account?hsLang=en) - [How to log in](https://support.kozutumi.com/en/how-to-log-in?hsLang=en) - [Recommended Environment for Using Kozutumi](https://support.kozutumi.com/en/recommended-environment-for-using-kozutumi?hsLang=en) - [For First-Time Recipients of Emails from Kozutumi](https://support.kozutumi.com/en/introduction-to-kozutumi?hsLang=en) [See more](https://support.kozutumi.com/en/getting-started?hsLang=en) ### [Sending and Receiving Files How to send and receive files](https://support.kozutumi.com/en/sending-and-receiving-files?hsLang=en) - [Send a file](https://support.kozutumi.com/en/send-a-file?hsLang=en) - [Receive a file](https://support.kozutumi.com/en/receive-a-file?hsLang=en) - [Send a file using a download link](https://support.kozutumi.com/en/send-a-file-using-a-download-link?hsLang=en) - [How to send and receive files with a group email address](https://support.kozutumi.com/en/how-to-send-and-receive-files-with-a-group-email-address?hsLang=en) - [Unsupported file formats in Kozutumi](https://support.kozutumi.com/en/unsupported-file-formats-in-kozutumi?hsLang=en) [See more](https://support.kozutumi.com/en/sending-and-receiving-files?hsLang=en) ### [Organization and User Management How to manage users and organizations](https://support.kozutumi.com/en/organization-and-user-management?hsLang=en) - [Organization management features](https://support.kozutumi.com/en/organization-management-features?hsLang=en) - [How to use organization management: Creating a group](https://support.kozutumi.com/en/how-to-use-organization-management-creating-a-group?hsLang=en) - [How to use organization management: Changing user permissions](https://support.kozutumi.com/en/how-to-use-organization-management-changing-user-permissions?hsLang=en) - [How to use organization management: Changing a member's name](https://support.kozutumi.com/en/how-to-use-organization-management-changing-a-members-name?hsLang=en) - [How to use organization management: Using the audit feature](https://support.kozutumi.com/en/how-to-use-organization-management-using-the-audit-feature?hsLang=en) [See more](https://support.kozutumi.com/en/organization-and-user-management?hsLang=en) ### [Security Security features and measures](https://support.kozutumi.com/en/security?hsLang=en) - [Third-Party Security Certification](https://support.kozutumi.com/en/third-party-security-certification?hsLang=en) - [About Service Security and Data Protection](https://support.kozutumi.com/en/about-service-security-and-data-protection?hsLang=en) - [About the Automatic Inclusion of Cyber Risk Insurance in Kozutumi Plans](https://support.kozutumi.com/en/about-the-automatic-inclusion-of-cyber-risk-insurance-in-kozutumi-plans?hsLang=en) [See more](https://support.kozutumi.com/en/security?hsLang=en) ### [Contracts and Billing About contracts and billing](https://support.kozutumi.com/en/contracts-and-billing?hsLang=en) - [Questions about Billing and Invoicing](https://support.kozutumi.com/en/questions-about-billing-and-invoicing?hsLang=en) - [How to cancel your subscription](https://support.kozutumi.com/en/how-to-cancel-your-subscription?hsLang=en) [See more](https://support.kozutumi.com/en/contracts-and-billing?hsLang=en) ### [notice](https://support.kozutumi.com/en/notice?hsLang=en) - [Kozutumi Surpasses 3,000 Registered Companies!](https://support.kozutumi.com/en/-%E3%81%8A%E7%9F%A5%E3%82%89%E3%81%9B-kozutumi%E3%81%AE%E5%88%A9%E7%94%A8%E4%BC%81%E6%A5%AD%E6%95%B0%E3%81%8C3000%E7%A4%BE%E3%82%92%E7%AA%81%E7%A0%B4%E3%81%84%E3%81%9F%E3%81%97%E3%81%BE%E3%81%97%E3%81%9F?hsLang=en) - [Notification of "Restricted Approver" Feature Added to Transmission Approval Function](https://support.kozutumi.com/en/notice/restricted-approver-feature-for-transmission-approval?hsLang=en) - [Announcement of the New “Bulk Send” Feature](https://support.kozutumi.com/en/announcement-of-the-new-bulk-send-feature?hsLang=en) - [Notice of the New “Send Template” Feature](https://support.kozutumi.com/en/notice-of-the-new-send-template-feature?hsLang=en) [See more](https://support.kozutumi.com/en/notice?hsLang=en) - ホーム - 製品 - 価格 - ブログ - 会社 [![株式会社ハートビーツ](https://support.kozutumi.com/hs-fs/hubfs/HEARTBEATS_logo_%E6%A8%AA.png?width=1232&height=241&name=HEARTBEATS_logo_%E6%A8%AA.png "株式会社ハートビーツ")](https://heartbeats.jp) [Kozutumi HelpCenter](https://support.kozutumi.com/?hsLang=en) [Kozutumi ホームページ](https://kozutumi.com/?hsLang=en) © 2025 株式会社ハートビーツ