SMS Delivery Delays and Failures from a Subset of Twilio Phone Numbers to Rakuten Japan

Incident Report for Twilio

Resolved

The incident has been resolved and SMS delivery from a subset of Twilio Phone Numbers to Rakuten network subscribers in Japan is operating normally.

Posted May 29, 2026 - 00:52 PDT

Monitoring

We have observed a recovery in SMS delivery from a subset of Twilio Phone Numbers to Rakuten network subscribers in Japan and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

Posted May 28, 2026 - 23:01 PDT

Update

Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Phone Numbers to Rakuten network subscribers in Japan. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

Posted May 28, 2026 - 23:00 PDT

Update

Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Phone Numbers to Rakuten network subscribers in Japan. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

Posted May 28, 2026 - 21:00 PDT

Identified

Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Phone Numbers to Rakuten network subscribers in Japan. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

Posted May 28, 2026 - 19:59 PDT

Investigating

Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Phone Numbers to Rakuten network subscribers in Japan. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

Posted May 28, 2026 - 19:49 PDT

This incident affected: CARRIER NETWORK (SMS, APAC).