diff --git a/app/Http/Controllers/Api/V1/CategoryController.php b/app/Http/Controllers/Api/V1/CategoryController.php
index 5767f5a..c2348f0 100644
--- a/app/Http/Controllers/Api/V1/CategoryController.php
+++ b/app/Http/Controllers/Api/V1/CategoryController.php
@@ -4,6 +4,10 @@
 
 use App\Helpers\ApiResponse;
 use App\Http\Controllers\Controller;
+use App\Http\Requests\Category\CategoryMoveRequest;
+use App\Http\Requests\Category\CategoryReorderRequest;
+use App\Http\Requests\Category\CategoryStoreRequest;
+use App\Http\Requests\Category\CategoryUpdateRequest;
 use App\Services\CategoryService;
 use Illuminate\Http\Request;
 
@@ -13,46 +17,46 @@ public function __construct(private CategoryService $service) {}
 
     public function index(Request $request)
     {
-        return ApiResponse::handle(fn () => $this->service->index($request->all()), '카테고리 목록 조회');
+        return ApiResponse::handle(fn () => $this->service->index($request->all()), __('message.category.fetched'));
     }
 
     public function show(int $id)
     {
-        return ApiResponse::handle(fn () => $this->service->show($id), '카테고리 단건 조회');
+        return ApiResponse::handle(fn () => $this->service->show($id), __('message.category.fetched'));
     }
 
-    public function store(Request $request)
+    public function store(CategoryStoreRequest $request)
     {
-        return ApiResponse::handle(fn () => $this->service->store($request->all()), '카테고리 생성');
+        return ApiResponse::handle(fn () => $this->service->store($request->validated()), __('message.category.created'));
     }
 
-    public function update(int $id, Request $request)
+    public function update(int $id, CategoryUpdateRequest $request)
     {
-        return ApiResponse::handle(fn () => $this->service->update($id, $request->all()), '카테고리 수정');
+        return ApiResponse::handle(fn () => $this->service->update($id, $request->validated()), __('message.category.updated'));
     }
 
     public function destroy(int $id)
     {
-        return ApiResponse::handle(fn () => $this->service->destroy($id), '카테고리 삭제');
+        return ApiResponse::handle(fn () => $this->service->destroy($id), __('message.category.deleted'));
     }
 
     public function toggle(int $id)
     {
-        return ApiResponse::handle(fn () => $this->service->toggle($id), '카테고리 활성/비활성 토글');
+        return ApiResponse::handle(fn () => $this->service->toggle($id), __('message.category.toggled'));
     }
 
-    public function move(int $id, Request $request)
+    public function move(int $id, CategoryMoveRequest $request)
     {
-        return ApiResponse::handle(fn () => $this->service->move($id, $request->all()), '카테고리 이동');
+        return ApiResponse::handle(fn () => $this->service->move($id, $request->validated()), __('message.category.moved'));
     }
 
-    public function reorder(Request $request)
+    public function reorder(CategoryReorderRequest $request)
     {
-        return ApiResponse::handle(fn () => $this->service->reorder($request->all()), '카테고리 정렬순서 일괄 변경');
+        return ApiResponse::handle(fn () => $this->service->reorder($request->validated()), __('message.category.reordered'));
     }
 
     public function tree(Request $request)
     {
-        return ApiResponse::handle(fn () => $this->service->tree($request->all()), '카테고리 트리 조회');
+        return ApiResponse::handle(fn () => $this->service->tree($request->all()), __('message.category.tree_fetched'));
     }
-}
+}
\ No newline at end of file
diff --git a/app/Http/Controllers/Api/V1/TenantController.php b/app/Http/Controllers/Api/V1/TenantController.php
index 8543248..7cf2695 100644
--- a/app/Http/Controllers/Api/V1/TenantController.php
+++ b/app/Http/Controllers/Api/V1/TenantController.php
@@ -4,50 +4,54 @@
 
 use App\Helpers\ApiResponse;
 use App\Http\Controllers\Controller;
+use App\Http\Requests\Tenant\TenantStoreRequest;
+use App\Http\Requests\Tenant\TenantUpdateRequest;
 use App\Services\TenantService;
 use Illuminate\Http\Request;
 
 class TenantController extends Controller
 {
+    public function __construct(private TenantService $service) {}
+
     public function index(Request $request)
     {
         return ApiResponse::handle(function () use ($request) {
-            return TenantService::getTenants($request->all());
-        }, '테넌트목록 조회');
+            return $this->service->getTenants($request->all());
+        }, __('message.tenant.fetched'));
     }
 
     public function show(Request $request)
     {
         return ApiResponse::handle(function () use ($request) {
-            return TenantService::getTenant($request->all());
-        }, '테넌트정보 조회');
+            return $this->service->getTenant($request->all());
+        }, __('message.tenant.fetched'));
     }
 
-    public function update(Request $request)
+    public function store(TenantStoreRequest $request)
     {
         return ApiResponse::handle(function () use ($request) {
-            return TenantService::updateTenant($request->all());
-        }, '테넌트정보 수정');
+            return $this->service->storeTenants($request->validated());
+        }, __('message.tenant.created'));
     }
 
-    public function store(Request $request)
+    public function update(TenantUpdateRequest $request)
     {
         return ApiResponse::handle(function () use ($request) {
-            return TenantService::storeTenants($request->all());
-        }, '테넌트 등록');
+            return $this->service->updateTenant($request->validated());
+        }, __('message.tenant.updated'));
     }
 
     public function destroy(Request $request)
     {
         return ApiResponse::handle(function () use ($request) {
-            return TenantService::destroyTenant($request->all());
-        }, '테넌트 삭제(탈퇴)');
+            return $this->service->destroyTenant($request->all());
+        }, __('message.tenant.deleted'));
     }
 
     public function restore(Request $request)
     {
         return ApiResponse::handle(function () use ($request) {
-            return TenantService::restoreTenant($request->all());
-        }, '테넌트 복구');
+            return $this->service->restoreTenant($request->all());
+        }, __('message.tenant.restored'));
     }
-}
+}
\ No newline at end of file
diff --git a/app/Http/Requests/Category/CategoryMoveRequest.php b/app/Http/Requests/Category/CategoryMoveRequest.php
new file mode 100644
index 0000000..f888fc8
--- /dev/null
+++ b/app/Http/Requests/Category/CategoryMoveRequest.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Http\Requests\Category;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class CategoryMoveRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'parent_id' => 'nullable|integer|exists:categories,id',
+            'sort_order' => 'nullable|integer',
+        ];
+    }
+}
\ No newline at end of file
diff --git a/app/Http/Requests/Category/CategoryReorderRequest.php b/app/Http/Requests/Category/CategoryReorderRequest.php
new file mode 100644
index 0000000..886e730
--- /dev/null
+++ b/app/Http/Requests/Category/CategoryReorderRequest.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Http\Requests\Category;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class CategoryReorderRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'items' => 'required|array',
+            'items.*.id' => 'required|integer|exists:categories,id',
+            'items.*.sort_order' => 'required|integer',
+        ];
+    }
+}
\ No newline at end of file
diff --git a/app/Http/Requests/Category/CategoryStoreRequest.php b/app/Http/Requests/Category/CategoryStoreRequest.php
new file mode 100644
index 0000000..4ff598f
--- /dev/null
+++ b/app/Http/Requests/Category/CategoryStoreRequest.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Http\Requests\Category;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class CategoryStoreRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'parent_id' => 'nullable|integer|exists:categories,id',
+            'code' => 'nullable|string|max:50',
+            'name' => 'required|string|max:100',
+            'description' => 'nullable|string|max:255',
+            'is_active' => 'nullable|boolean',
+            'sort_order' => 'nullable|integer',
+        ];
+    }
+}
\ No newline at end of file
diff --git a/app/Http/Requests/Category/CategoryUpdateRequest.php b/app/Http/Requests/Category/CategoryUpdateRequest.php
new file mode 100644
index 0000000..4e82fec
--- /dev/null
+++ b/app/Http/Requests/Category/CategoryUpdateRequest.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Http\Requests\Category;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class CategoryUpdateRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'parent_id' => 'nullable|integer|exists:categories,id',
+            'code' => 'nullable|string|max:50',
+            'name' => 'sometimes|string|max:100',
+            'description' => 'nullable|string|max:255',
+            'is_active' => 'nullable|boolean',
+            'sort_order' => 'nullable|integer',
+        ];
+    }
+}
\ No newline at end of file
diff --git a/app/Http/Requests/Tenant/TenantStoreRequest.php b/app/Http/Requests/Tenant/TenantStoreRequest.php
new file mode 100644
index 0000000..05d42cd
--- /dev/null
+++ b/app/Http/Requests/Tenant/TenantStoreRequest.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Http\Requests\Tenant;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class TenantStoreRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'company_name' => 'required|string|max:100',
+            'email' => 'nullable|email|max:100',
+            'phone' => 'nullable|string|max:20',
+            'address' => 'nullable|string|max:255',
+            'business_num' => 'nullable|string|max:20',
+            'ceo_name' => 'nullable|string|max:100',
+        ];
+    }
+}
\ No newline at end of file
diff --git a/app/Http/Requests/Tenant/TenantUpdateRequest.php b/app/Http/Requests/Tenant/TenantUpdateRequest.php
new file mode 100644
index 0000000..ce90b13
--- /dev/null
+++ b/app/Http/Requests/Tenant/TenantUpdateRequest.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Http\Requests\Tenant;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class TenantUpdateRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'tenant_id' => 'required|integer|exists:tenants,id',
+            'company_name' => 'sometimes|string|max:100',
+            'email' => 'nullable|email|max:100',
+            'phone' => 'nullable|string|max:20',
+            'address' => 'nullable|string|max:255',
+            'business_num' => 'nullable|string|max:20',
+            'ceo_name' => 'nullable|string|max:100',
+        ];
+    }
+}
\ No newline at end of file
diff --git a/lang/ko/message.php b/lang/ko/message.php
index 223f80b..d985bb1 100644
--- a/lang/ko/message.php
+++ b/lang/ko/message.php
@@ -51,6 +51,14 @@
     ],
 
     'category' => [
+        'fetched' => '카테고리를 조회했습니다.',
+        'created' => '카테고리가 등록되었습니다.',
+        'updated' => '카테고리가 수정되었습니다.',
+        'deleted' => '카테고리가 삭제되었습니다.',
+        'toggled' => '카테고리 상태가 변경되었습니다.',
+        'moved' => '카테고리가 이동되었습니다.',
+        'reordered' => '카테고리 정렬순서가 변경되었습니다.',
+        'tree_fetched' => '카테고리 트리를 조회했습니다.',
         'fields_saved' => '카테고리 필드가 저장되었습니다.',
         'template_saved' => '카테고리 템플릿이 저장되었습니다.',
         'template_applied' => '카테고리 템플릿이 적용되었습니다.',
@@ -110,6 +118,15 @@
         'tenant_switched' => '활성 테넌트가 전환되었습니다.',
     ],
 
+    // 테넌트 관리
+    'tenant' => [
+        'fetched' => '테넌트를 조회했습니다.',
+        'created' => '테넌트가 등록되었습니다.',
+        'updated' => '테넌트가 수정되었습니다.',
+        'deleted' => '테넌트가 삭제되었습니다.',
+        'restored' => '테넌트가 복구되었습니다.',
+    ],
+
     // 파일 관리
     'file' => [
         'uploaded' => '파일이 업로드되었습니다.',