diff --git a/docs/release_note_en.md b/docs/release_note_en.md
index 0cbba398..efaa0e44 100644
--- a/docs/release_note_en.md
+++ b/docs/release_note_en.md
@@ -1,5 +1,9 @@
 [top](../readme.md) > English / [Japanese](release_note_ja.md)
 
+NYAGOS 4.4.15\_0 
+================
+Apr 7, 2024
+
 The binaries of this version are built with Go 1.20.14  
 They support Windows 7, 8.1, 10, 11, WindowsServer 2008 or later, and Linux.
 
diff --git a/docs/release_note_ja.md b/docs/release_note_ja.md
index faf4fac9..c7e7a974 100644
--- a/docs/release_note_ja.md
+++ b/docs/release_note_ja.md
@@ -1,5 +1,9 @@
 [top](../readme_ja.md) > [English](release_note_en.md) / Japanese
 
+NYAGOS 4.4.15\_0
+================
+(2024.04.07)
+
 当バージョンのバイナリは Go 1.20.14 でビルドしました。  
 サポート対象は Windows 7, 8.1, 10, 11, WindowsServer 2008以降, Linux となります。