diff --git a/modules/cases/build.gradle b/modules/cases/build.gradle
index 837ddb4..caf4db9 100644
--- a/modules/cases/build.gradle
+++ b/modules/cases/build.gradle
@@ -41,3 +41,16 @@ tasks.register('runMS', JavaExec) {
     systemProperty 'org.slf4j.simpleLogger.showShortLogName', 'true'
     systemProperty 'org.slf4j.simpleLogger.levelInBrackets', 'true'
 }
+
+
+tasks.register('run345', JavaExec) {
+    classpath = sourceSets.main.runtimeClasspath
+    mainClass = 'com.tsurugidb.tsubakuro.examples.sesscionClose.Main'
+
+    systemProperty 'tsurugi.dbname', findProperty('tsurugi.dbname') ?: 'ipc:tsurugi'
+
+    systemProperty 'org.slf4j.simpleLogger.defaultLogLevel', findProperty('loglevel') ?: 'info'
+    systemProperty 'org.slf4j.simpleLogger.showThreadName', 'false'
+    systemProperty 'org.slf4j.simpleLogger.showShortLogName', 'true'
+    systemProperty 'org.slf4j.simpleLogger.levelInBrackets', 'true'
+}
diff --git a/modules/cases/src/main/java/com/tsurugidb/tsubakuro/examples/sesscionClose/Main.java b/modules/cases/src/main/java/com/tsurugidb/tsubakuro/examples/sesscionClose/Main.java
new file mode 100644
index 0000000..fa93d11
--- /dev/null
+++ b/modules/cases/src/main/java/com/tsurugidb/tsubakuro/examples/sesscionClose/Main.java
@@ -0,0 +1,40 @@
+package com.tsurugidb.tsubakuro.examples.sesscionClose;
+
+import com.tsurugidb.tsubakuro.exception.ServerException;
+import com.tsurugidb.tsubakuro.common.Session;
+import com.tsurugidb.tsubakuro.common.SessionBuilder;
+import com.tsurugidb.tsubakuro.sql.SqlClient;
+
+
+public final class Main {
+    private static String url = System.getProperty("tsurugi.dbname");
+
+    public static void main(String[] args) {
+        for (int i = 0; i < 50; i++) {
+            try {
+                Session session = SessionBuilder.connect(url).create();
+                SqlClient sqlClient = SqlClient.attach(session);
+                var futureTransaction = sqlClient.createTransaction();
+                
+                session.close();
+            } catch (Exception e) {
+                System.out.println(e);
+            }
+        }
+        System.out.println("================");
+        for (int i = 0; i < 50; i++) {
+            try {
+                Session session = SessionBuilder.connect(url).create();
+                SqlClient sqlClient = SqlClient.attach(session);
+                var futureTransaction = sqlClient.createTransaction().get();
+
+                session.close();
+            } catch (Exception e) {
+                System.out.println(e);
+            }
+        }
+    }
+
+    private Main(String[] args) {
+    }
+}