diff --git a/CHANGELOG-Japanese.md b/CHANGELOG-Japanese.md
index ea6074f4..c56055ee 100644
--- a/CHANGELOG-Japanese.md
+++ b/CHANGELOG-Japanese.md
@@ -1,7 +1,9 @@
 # 初期リリース
 
-## 1.0.0 [2025/05/20] - AUSCERT/SINCON Release
+## 1.0.0 [2025/05/20] - AUSCERT/SINCON リリース
 
 **新機能:**
 
-- TBD
\ No newline at end of file
+- `audit-settings`: Windows Event Log audit policy settingsをチェックする
+- `audit-filesize`: Windows Event Logファイルサイズをチェックする
+- `update-rules`: WELAのSigmaルール設定ファイルを更新する
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 624c4d0a..0b0f2c1e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,6 @@
 
 **New Features:**
 
-- `audit-settings`: 
-- `audit-filesize`: 
-- `update-rules`: 
\ No newline at end of file
+- `audit-settings`: Check Windows Event Log audit policy settings.
+- `audit-filesize`: Check Windows Event Log file size.
+- `update-rules`: Update WELA's Sigma rules config files.
\ No newline at end of file