diff --git a/2025-activities/index.html b/2025-activities/index.html
index 2d6286a..0594fb6 100644
--- a/2025-activities/index.html
+++ b/2025-activities/index.html
@@ -50,6 +50,38 @@
 		</div>
 
 		<main class="activity">
+			
+			<article id="class23">
+				<h3 name="#1213">第15回本講義</h3>
+				<h4>2025-12-13</h4>
+				<p><img src="img/JD2025-15-img1.jpg" alt="">
+					
+				</p>
+				<p><img src="img/JD2025-15-img2.jpg" alt="">
+				
+				</p>
+			</article>
+			
+			<article id="class22">
+				<h3 name="#1129">第13回本講義</h3>
+				<h4>2025-11-29</h4>
+				<p><img src="img/JD2025-13-img1.jpg" alt="">
+				
+				</p>
+				<p><img src="img/JD2025-13-img2.jpg" alt="">
+					
+				</p>
+			</article>
+			
+			<article id="class21">
+				<h3 name="#1112">ビジネスマッチ東北</h3>
+				<h4>2025-11-12,13</h4>
+				<p><img src="img/JD2025-1112-img1.jpg" alt="">
+				
+				</p>
+				<p><img src="img/JD2025-1112-img2.jpg" alt="">
+				
+			</article>
 
 			<article id="class20">
 				<h3 name="#1101">サイエンスカンファレンス</h3>
@@ -480,4 +512,4 @@
 	<script type="text/javascript" src="../testpage/header.js"></script>
 </body>
 
-</html>
\ No newline at end of file
+</html>