diff --git a/component/scanner/build.gradle b/component/scanner/build.gradle
index a62143ad..e04fb839 100644
--- a/component/scanner/build.gradle
+++ b/component/scanner/build.gradle
@@ -52,4 +52,6 @@ dependencies {
     implementation project(':vcs')
 
     implementation project(':data')
+
+    implementation project(':component:common')
 }
\ No newline at end of file
diff --git a/component/scanner/src/main/java/one/nem/lacerta/component/scanner/ScannerManagerActivity.java b/component/scanner/src/main/java/one/nem/lacerta/component/scanner/ScannerManagerActivity.java
index 80cf6ae5..c2c8ed69 100644
--- a/component/scanner/src/main/java/one/nem/lacerta/component/scanner/ScannerManagerActivity.java
+++ b/component/scanner/src/main/java/one/nem/lacerta/component/scanner/ScannerManagerActivity.java
@@ -2,6 +2,7 @@ package one.nem.lacerta.component.scanner;
 
 import android.Manifest;
 import android.app.ProgressDialog;
+import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
@@ -29,7 +30,9 @@ import java.util.concurrent.CompletableFuture;
 import javax.inject.Inject;
 
 import dagger.hilt.android.AndroidEntryPoint;
+import one.nem.lacerta.component.common.picker.LacertaFilePickerDialog;
 import one.nem.lacerta.data.Document;
+import one.nem.lacerta.data.LacertaLibrary;
 import one.nem.lacerta.model.document.DocumentDetail;
 import one.nem.lacerta.model.document.DocumentMeta;
 import one.nem.lacerta.processor.factory.DocumentProcessorFactory;
@@ -53,9 +56,25 @@ public class ScannerManagerActivity extends AppCompatActivity {
     @Inject
     LacertaVcsFactory lacertaVcsFactory;
 
+//    @Inject
+//    public ScannerManagerActivity(LacertaLogger logger, Document document, LacertaLibrary lacertaLibrary, DocumentProcessorFactory documentProcessorFactory, LacertaVcsFactory lacertaVcsFactory) {
+//        this.logger = logger;
+//        this.document = document;
+//        this.lacertaLibrary = lacertaLibrary;
+//        this.documentProcessorFactory = documentProcessorFactory;
+//        this.lacertaVcsFactory = lacertaVcsFactory;
+//    }
+
+    @Inject
+    public ScannerManagerActivity() {
+        // Required empty public constructor
+    }
+
     // Variables
     private ArrayList<Bitmap> croppedImages = new ArrayList<>();
 
+    private boolean single = false;
+
     View view;
 
     DocumentScanner documentScanner = new DocumentScanner(
@@ -85,6 +104,36 @@ public class ScannerManagerActivity extends AppCompatActivity {
             null
     );
 
+    DocumentScanner documentScannerSingle = new DocumentScanner( // TODO-rca: ひどすぎるのでなんとかする
+            this,
+            (croppedImageResults) -> {
+                logger.debug(TAG, "croppedImage size: " + croppedImageResults.size());
+                ArrayList<Bitmap> croppedImages = new ArrayList<>();
+                for (String result : croppedImageResults) {
+                    croppedImages.add(BitmapFactory.decodeFile(result));
+                }
+                processResult(croppedImages);
+                return null;
+            },
+            (errorMessage) -> {
+                // an error happened
+                logger.error(TAG, "Error: " + errorMessage);
+                logger.e_code("543a230e-cb9a-47a2-8131-3beecfe1c458");
+                finish();
+                return null;
+            },
+            () -> {
+                // user canceled document scan
+                logger.debug(TAG, "User canceled document scan");
+                finish();
+                return null;
+            },
+            null,
+            null,
+            1
+    );
+
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -108,11 +157,21 @@ public class ScannerManagerActivity extends AppCompatActivity {
         setSupportActionBar(toolbar);
         Objects.requireNonNull(getSupportActionBar()).setDisplayHomeAsUpEnabled(true);
 
+        Intent intent = getIntent();
+        Bundle bundle = intent.getExtras();
+        if (bundle != null) {
+            this.single = bundle.getBoolean("single", false);
+        }
+
+        if (this.single) {
+            documentScanner = documentScannerSingle;
+        }
         documentScanner.startScan();
         // Init
 
         this.view = findViewById(R.id.main); // TODO-rca:なんとかする
 
+
     }
 
     @Override
@@ -125,15 +184,13 @@ public class ScannerManagerActivity extends AppCompatActivity {
     public boolean onOptionsItemSelected(android.view.MenuItem item) {
         if (item.getItemId() == R.id.action_save_new) {
             // 新ドキュメントとして保存
-            Toast.makeText(this, "保存処理", Toast.LENGTH_SHORT).show();
             saveNewDocument();
             return true;
-//        }
-//        else if (item.getItemId() == R.id.action_insert_exist) {
-//            // 既存ドキュメントに挿入
-//            Toast.makeText(this, "Work in progress", Toast.LENGTH_SHORT).show();
-//            insertToExistDocument();
-//            return true;
+        }
+        else if (item.getItemId() == R.id.action_insert_exist) {
+            // 既存ドキュメントに挿入
+            insertToExistDocument();
+            return true;
         } else if (item.getItemId() == android.R.id.home) {
             finish();
             return true;
@@ -174,7 +231,7 @@ public class ScannerManagerActivity extends AppCompatActivity {
             Bitmap[] bitmaps = new Bitmap[croppedImages.size()];
             croppedImages.toArray(bitmaps);
             logger.debug(TAG, "bitmaps.length: " + bitmaps.length);
-            addPagesToDocumentDetail(documentDetail, bitmaps).join();
+            addPagesToDocumentDetail(documentDetail, bitmaps, null).join();
             document.updateDocument(documentDetail).join();
             dialog.dismiss();
             finish();
@@ -182,11 +239,11 @@ public class ScannerManagerActivity extends AppCompatActivity {
 
     }
 
-    private CompletableFuture<Void> addPagesToDocumentDetail(DocumentDetail documentDetail, Bitmap[] bitmaps) {
+    private CompletableFuture<Void> addPagesToDocumentDetail(DocumentDetail documentDetail, Bitmap[] bitmaps, String commitMessage) {
         return CompletableFuture.runAsync(() -> {
             try {
                 document.updateDocument(documentProcessorFactory.create(documentDetail).addNewPagesToLast(bitmaps).getDocumentDetail()).join();
-                lacertaVcsFactory.create(documentDetail.getMeta().getId()).generateRevisionAtCurrent("Initial commit");
+                lacertaVcsFactory.create(documentDetail.getMeta().getId()).generateRevisionAtCurrent(commitMessage == null ? "Update" : commitMessage);
             } catch (Exception e) {
                 logger.error(TAG, "Error: " + e.getMessage());
                 logger.e_code("9dff2a28-20e8-4ccd-9d04-f0c7646faa6a");
@@ -196,7 +253,19 @@ public class ScannerManagerActivity extends AppCompatActivity {
 
     private void insertToExistDocument() {
         logger.debug(TAG, "insertToExistDocument");
-        // TODO-rca: 実装
+        LacertaFilePickerDialog dialog = new LacertaFilePickerDialog();
+        dialog.setListener(((name, fileId) -> {
+            document.getDocument(fileId).thenAccept((documentDetail) -> {
+                Bitmap[] bitmaps = new Bitmap[croppedImages.size()];
+                croppedImages.toArray(bitmaps);
+                logger.debug(TAG, "bitmaps.length: " + bitmaps.length);
+                addPagesToDocumentDetail(documentDetail, bitmaps, "ページを追加").join();
+                document.updateDocument(documentDetail).join();
+                finish();
+            });
+        }));
+        dialog.setTitle("追加するドキュメントを選択");
+        dialog.show(getSupportFragmentManager(), "LacertaFilePickerDialog");
     }
 
     private void updateResultView(ArrayList<Bitmap> resultImages) {
diff --git a/component/scanner/src/main/res/menu/scanner_result_toolbar.xml b/component/scanner/src/main/res/menu/scanner_result_toolbar.xml
index dc815d7b..9d957b4e 100644
--- a/component/scanner/src/main/res/menu/scanner_result_toolbar.xml
+++ b/component/scanner/src/main/res/menu/scanner_result_toolbar.xml
@@ -6,9 +6,9 @@
         android:icon="@drawable/save_24px"
         android:title="Save"
         app:showAsAction="ifRoom"/>
-<!--    <item-->
-<!--        android:id="@+id/action_insert_exist"-->
-<!--        android:icon="@drawable/description_24px"-->
-<!--        android:title="Insert"-->
-<!--        app:showAsAction="ifRoom"/>-->
+    <item
+        android:id="@+id/action_insert_exist"
+        android:icon="@drawable/description_24px"
+        android:title="Insert"
+        app:showAsAction="ifRoom"/>
 </menu>
\ No newline at end of file