# Japan **Delivery Reports** Unfortunately, delivery reports from Japanese numbers are unreliable and can be fake. **URLs** It is not allowed to send URLs in your messages. Messages that contain a weblink are classified as illegal and are either discarded completely or a part of the illegal text will be removed. **Operator-Specific Restrictions** DoCoMo A maximum of 160 bytes/160 standard characters per SMS applies Softbank A maximum of 160 bytes/160 standard characters per SMS applies KDDI A maximum of 100 bytes/100 standard characters per SMS applies --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.bird.com/connectivity-platform/country-restrictions-and-regulations/japan.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.