diff --git a/README.md b/README.md
index d6634a5..6fbfaeb 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,11 @@ SJ3 is a kana-kanji conversion system for Japanese text input.
 
 Unless otherwise noted, SJ3 is released under the MIT License.
 
+Except as contained in this notice, the name of Sony Corporation and/or Software
+Research Associates shall not be used in advertising or otherwise to promote the
+sale, use or other dealings in this software without prior written authorization
+from the organizations.
+
 ## Acknowledgments
 
 We highly appreciate the release of SJ3 source code as a free and open source