diff --git a/44_write_latest.sh b/44_write_latest.sh
index 0364e1a..daf42c8 100755
--- a/44_write_latest.sh
+++ b/44_write_latest.sh
@@ -134,6 +134,16 @@
         exit 1
     fi
     
+    echo "Erasing flash memory completely..."
+    $BUILD_TOOL --chip esp32 --port "$PORT" --baud 460800 erase_flash
+    
+    if [ $? -ne 0 ]; then
+        echo "Flash erase failed."
+        exit 1
+    fi
+    
+    echo "Flash erase completed successfully."
+    
     echo "Flashing ESP32 firmware using esptool..."
     echo "Bootloader: latest.bootloader.bin"
     echo "Partitions: latest.partitions.bin"
@@ -145,7 +155,15 @@
         0x8000 "latest.partitions.bin" \
         0x10000 "latest.bin"
     
-    echo "Flashing completed."
+    if [ $? -eq 0 ]; then
+        echo "Flashing completed successfully."
+        echo "Resetting ESP32..."
+        $BUILD_TOOL --chip esp32 --port "$PORT" --baud 460800 run
+        echo "ESP32 reset completed. The new program should now be running."
+    else
+        echo "Flashing failed."
+        exit 1
+    fi
   fi
   # シリアルモニタを開くか確認
   if [ -z "$2" ]; then
diff --git a/m5latest.sh b/m5latest.sh
index 0364e1a..daf42c8 100755
--- a/m5latest.sh
+++ b/m5latest.sh
@@ -134,6 +134,16 @@
         exit 1
     fi
     
+    echo "Erasing flash memory completely..."
+    $BUILD_TOOL --chip esp32 --port "$PORT" --baud 460800 erase_flash
+    
+    if [ $? -ne 0 ]; then
+        echo "Flash erase failed."
+        exit 1
+    fi
+    
+    echo "Flash erase completed successfully."
+    
     echo "Flashing ESP32 firmware using esptool..."
     echo "Bootloader: latest.bootloader.bin"
     echo "Partitions: latest.partitions.bin"
@@ -145,7 +155,15 @@
         0x8000 "latest.partitions.bin" \
         0x10000 "latest.bin"
     
-    echo "Flashing completed."
+    if [ $? -eq 0 ]; then
+        echo "Flashing completed successfully."
+        echo "Resetting ESP32..."
+        $BUILD_TOOL --chip esp32 --port "$PORT" --baud 460800 run
+        echo "ESP32 reset completed. The new program should now be running."
+    else
+        echo "Flashing failed."
+        exit 1
+    fi
   fi
   # シリアルモニタを開くか確認
   if [ -z "$2" ]; then
diff --git a/upload_by_hash.sh b/upload_by_hash.sh
index 3e4c25f..99d1a78 100755
--- a/upload_by_hash.sh
+++ b/upload_by_hash.sh
@@ -72,6 +72,16 @@
     exit 1
 fi
 
+echo "Erasing flash memory completely..."
+$BUILD_TOOL --chip esp32 --port "$PORT" --baud 460800 erase_flash
+
+if [ $? -ne 0 ]; then
+    echo "Flash erase failed."
+    exit 1
+fi
+
+echo "Flash erase completed successfully."
+
 echo "Flashing ESP32 firmware using esptool..."
 echo "Bootloader: byhash.bootloader.bin"
 echo "Partitions: byhash.partitions.bin"
@@ -83,7 +93,15 @@
     0x8000 "byhash.partitions.bin" \
     0x10000 "byhash.bin"
 
-echo "Flashing completed."
+if [ $? -eq 0 ]; then
+    echo "Flashing completed successfully."
+    echo "Resetting ESP32..."
+    $BUILD_TOOL --chip esp32 --port "$PORT" --baud 460800 run
+    echo "ESP32 reset completed. The new program should now be running."
+else
+    echo "Flashing failed."
+    exit 1
+fi
 
 # シリアルモニタを開くか確認
 read -p "シリアルモニタを開きますか？(y/n): " yn