2026/09/14 [Incident Report] Delays in Notification Emails and Disruption of Email History Search Function
Thank you for using Kozutumi.
Starting at approximately 16:02 on Monday, September 14, a system issue occurred affecting certain features of Kozutumi. While the delay in notification email delivery was resolved at 17:12 on the same day, the send/receive history search function remains unavailable.
We deeply apologize for the significant inconvenience this has caused our users. Please find the details below:
■ Date & Time of Occurrence Monday, September 14, 2026, approx. 16:02 – Present (*The search function issue is ongoing)
■ User Impact
- Notification Email Delays [Resolved at 17:12] Between 16:05 and 17:12, there were delays in the delivery of notification emails, including "File Arrival," "Download Link," and "Download Complete." *Note: All delayed emails from this timeframe have since been successfully delivered. No emails were lost.
- Send/Receive History Search [Currently Unavailable] Since approximately 16:02, the search box at the top of the screen used for finding history has been unavailable.
*Note: Core features, including sending, receiving, and downloading files, are completely unaffected and can be used as usual.
■ Root Cause A system outage within the search service of our cloud infrastructure provider (Microsoft Azure).
■ Current Status & Future Actions
- Regarding the notification email delays, we implemented a workaround on our system and fully restored normal email delivery at 17:12.
- Regarding the search function, we are currently awaiting system recovery on the cloud infrastructure's (Microsoft) end. We regret to inform you that the estimated time of restoration is currently undetermined.
We will provide another update on this page as soon as the search function is restored.
We sincerely apologize once again for the inconvenience and disruption this has caused.