diff --git a/app/Models/User/Databases/DatabasesInputCols.php b/app/Models/User/Databases/DatabasesInputCols.php
index 93a2c750f..0d87607b4 100644
--- a/app/Models/User/Databases/DatabasesInputCols.php
+++ b/app/Models/User/Databases/DatabasesInputCols.php
@@ -13,4 +13,15 @@ class DatabasesInputCols extends Model
 
     // 更新する項目の定義
     protected $fillable = ['databases_inputs_id', 'databases_columns_id', 'value'];
+
+    // リレーション
+    /**
+     * データベース入力
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     * @phpcsSuppress
+     */
+    public function databases_input() // phpcs:ignore
+    {
+        return $this->belongsTo(DatabasesInputs::class, 'databases_inputs_id');
+    }
 }
diff --git a/app/Models/User/Databases/DatabasesInputs.php b/app/Models/User/Databases/DatabasesInputs.php
index db0bf0fb8..ea688892f 100644
--- a/app/Models/User/Databases/DatabasesInputs.php
+++ b/app/Models/User/Databases/DatabasesInputs.php
@@ -30,6 +30,7 @@ class DatabasesInputs extends Model
         'first_committed_at',
         'categories_id',
         'views',
+        'last_col_updated_at',
         'created_at',
         'updated_at'
     ];
diff --git a/app/Observers/User/Databases/DatabasesInputColsObserver.php b/app/Observers/User/Databases/DatabasesInputColsObserver.php
new file mode 100644
index 000000000..53719a7c8
--- /dev/null
+++ b/app/Observers/User/Databases/DatabasesInputColsObserver.php
@@ -0,0 +1,70 @@
+<?php
+
+namespace App\Observers\User\Databases;
+
+use App\Models\User\Databases\DatabasesInputCols;
+use Carbon\Carbon;
+
+class DatabasesInputColsObserver
+{
+    /**
+     * Handle the DatabasesInputCols "created" event.
+     *
+     * @param  App\Models\User\Databases\DatabasesInputCols  $databases_input_cols
+     * @return void
+     */
+    public function created(DatabasesInputCols $databases_input_cols)
+    {
+        $databases_input_cols->databases_input->update([
+            'last_col_updated_at' => Carbon::now(),
+        ]);
+    }
+
+    /**
+     * Handle the DatabasesInputCols "updated" event.
+     *
+     * @param  App\Models\User\Databases\DatabasesInputCols  $databases_input_cols
+     * @return void
+     */
+    public function updated(DatabasesInputCols $databases_input_cols)
+    {
+        $databases_input_cols->databases_input->update([
+            'last_col_updated_at' => Carbon::now(),
+        ]);
+    }
+
+    /**
+     * Handle the DatabasesInputCols "deleted" event.
+     *
+     * @param  App\Models\User\Databases\DatabasesInputCols  $databases_input_cols
+     * @return void
+     */
+    public function deleted(DatabasesInputCols $databases_input_cols)
+    {
+        $databases_input_cols->databases_input->update([
+            'last_col_updated_at' => Carbon::now(),
+        ]);
+    }
+
+    /**
+     * Handle the DatabasesInputCols "restored" event.
+     *
+     * @param  App\Models\User\Databases\DatabasesInputCols  $databases_input_cols
+     * @return void
+     */
+    public function restored(DatabasesInputCols $databases_input_cols)
+    {
+        //
+    }
+
+    /**
+     * Handle the DatabasesInputCols "force deleted" event.
+     *
+     * @param  App\Models\User\Databases\DatabasesInputCols  $databases_input_cols
+     * @return void
+     */
+    public function forceDeleted(DatabasesInputCols $databases_input_cols)
+    {
+        //
+    }
+}
diff --git a/app/Plugins/User/Databases/DatabasesPlugin.php b/app/Plugins/User/Databases/DatabasesPlugin.php
index a777c7e7a..0abbf2248 100644
--- a/app/Plugins/User/Databases/DatabasesPlugin.php
+++ b/app/Plugins/User/Databases/DatabasesPlugin.php
@@ -1912,7 +1912,7 @@ private function getColumnValue(?DatabasesInputs $input, string $db_col_name = '
             $value = $input->created_at;
         } elseif ($column->column_type == DatabaseColumnType::updated) {
             // 更新日型
-            $value = $input->updated_at;
+            $value = $input->last_col_updated_at;
         } elseif ($column->column_type == DatabaseColumnType::posted) {
             // 公開日型
             $value = $input->posted_at;
@@ -3139,7 +3139,7 @@ public function downloadCsv($request, $page_id, $frame_id, $id, $data_output_fla
                                         select(
                                             'databases_input_cols.*',
                                             'databases_inputs.created_at as inputs_created_at',
-                                            'databases_inputs.updated_at as inputs_updated_at',
+                                            'databases_inputs.last_col_updated_at as inputs_updated_at',
                                             'databases_inputs.posted_at as inputs_posted_at',
                                             'databases_inputs.expires_at as inputs_expires_at',
                                             'databases_inputs.display_sequence as inputs_display_sequence',
diff --git a/app/Providers/EventServiceProvider.php b/app/Providers/EventServiceProvider.php
index d1dd7eb86..8d3356fd6 100644
--- a/app/Providers/EventServiceProvider.php
+++ b/app/Providers/EventServiceProvider.php
@@ -2,6 +2,8 @@
 
 namespace App\Providers;
 
+use App\Models\User\Databases\DatabasesInputCols;
+use App\Observers\User\Databases\DatabasesInputColsObserver;
 use Illuminate\Auth\Events\Registered;
 use Illuminate\Auth\Listeners\SendEmailVerificationNotification;
 use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;
@@ -33,6 +35,7 @@ public function boot()
     {
         parent::boot();
 
-        //
+        // オブザーバーの登録
+        DatabasesInputCols::observe(DatabasesInputColsObserver::class);
     }
 }
diff --git a/database/migrations/2025_01_31_172824_add_last_col_updated_at_to_databases_inputs_table.php b/database/migrations/2025_01_31_172824_add_last_col_updated_at_to_databases_inputs_table.php
new file mode 100644
index 000000000..f37c04723
--- /dev/null
+++ b/database/migrations/2025_01_31_172824_add_last_col_updated_at_to_databases_inputs_table.php
@@ -0,0 +1,44 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class AddLastColUpdatedAtToDatabasesInputsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('databases_inputs', function (Blueprint $table) {
+            $table->timestamp('last_col_updated_at')->nullable()->after('full_text');
+        });
+
+        // 既存データの更新
+        \DB::statement('
+            UPDATE databases_inputs di
+            SET di.last_col_updated_at = (
+                SELECT updated_at
+                FROM databases_input_cols dic
+                WHERE dic.databases_inputs_id = di.id
+                ORDER BY updated_at DESC
+                LIMIT 1
+            )
+        ');
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('databases_inputs', function (Blueprint $table) {
+            $table->dropColumn('last_col_updated_at');
+        });
+    }
+}
diff --git a/resources/views/plugins/user/databases/default/databases_include_detail_value.blade.php b/resources/views/plugins/user/databases/default/databases_include_detail_value.blade.php
index 68d7bf029..ef50b9491 100644
--- a/resources/views/plugins/user/databases/default/databases_include_detail_value.blade.php
+++ b/resources/views/plugins/user/databases/default/databases_include_detail_value.blade.php
@@ -83,7 +83,7 @@
     }
     // 更新日型
     elseif ($column->column_type == DatabaseColumnType::updated) {
-        $value = $inputs->updated_at;
+        $value = $inputs->last_col_updated_at;
     }
     // 表示件数型
     elseif ($column->column_type == DatabaseColumnType::views) {
diff --git a/resources/views/plugins/user/databases/default/databases_include_value.blade.php b/resources/views/plugins/user/databases/default/databases_include_value.blade.php
index 6d9264f10..6fbbcd5ae 100644
--- a/resources/views/plugins/user/databases/default/databases_include_value.blade.php
+++ b/resources/views/plugins/user/databases/default/databases_include_value.blade.php
@@ -85,7 +85,7 @@
     }
     // 更新日型
     elseif ($column->column_type == DatabaseColumnType::updated) {
-        $value = $input->updated_at;
+        $value = $input->last_col_updated_at;
     }
     // 表示件数型
     elseif ($column->column_type == DatabaseColumnType::views) {