add request in commercial use.

README.md

@@ -24,7 +24,7 @@ This model is based on T5 v1.1. It was pre-trained on a Japanese corpus. For the
 - **Developed by:** Retrieva, Inc.
 - **Model type:** T5 v1.1
 - **Language(s) (NLP):** Japanese
-- **License:** CC-BY-SA 4.0
+- **License:** CC-BY-SA 4.0 Although commercial use is permitted, we kindly request that you contact us beforehand.
 
 
 ## Training Details