diff --git a/app/src/main/java/one/nem/lacerta/AppBlankFragment.java b/app/src/main/java/one/nem/lacerta/AppBlankFragment.java
deleted file mode 100644
index 5a9ba291..00000000
--- a/app/src/main/java/one/nem/lacerta/AppBlankFragment.java
+++ /dev/null
@@ -1,64 +0,0 @@
-package one.nem.lacerta;
-
-import android.os.Bundle;
-
-import androidx.fragment.app.Fragment;
-
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-
-/**
- * A simple {@link Fragment} subclass.
- * Use the {@link AppBlankFragment#newInstance} factory method to
- * create an instance of this fragment.
- */
-public class AppBlankFragment extends Fragment {
-
-    // TODO: Rename parameter arguments, choose names that match
-    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
-    private static final String ARG_PARAM1 = "param1";
-    private static final String ARG_PARAM2 = "param2";
-
-    // TODO: Rename and change types of parameters
-    private String mParam1;
-    private String mParam2;
-
-    public AppBlankFragment() {
-        // Required empty public constructor
-    }
-
-    /**
-     * Use this factory method to create a new instance of
-     * this fragment using the provided parameters.
-     *
-     * @param param1 Parameter 1.
-     * @param param2 Parameter 2.
-     * @return A new instance of fragment AppBlankFragment.
-     */
-    // TODO: Rename and change types and number of parameters
-    public static AppBlankFragment newInstance(String param1, String param2) {
-        AppBlankFragment fragment = new AppBlankFragment();
-        Bundle args = new Bundle();
-        args.putString(ARG_PARAM1, param1);
-        args.putString(ARG_PARAM2, param2);
-        fragment.setArguments(args);
-        return fragment;
-    }
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        if (getArguments() != null) {
-            mParam1 = getArguments().getString(ARG_PARAM1);
-            mParam2 = getArguments().getString(ARG_PARAM2);
-        }
-    }
-
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
-                             Bundle savedInstanceState) {
-        // Inflate the layout for this fragment
-        return inflater.inflate(R.layout.app_fragment_blank, container, false);
-    }
-}
\ No newline at end of file
diff --git a/app/src/main/java/one/nem/lacerta/MainActivity.java b/app/src/main/java/one/nem/lacerta/MainActivity.java
index c6e95e23..1e990f71 100644
--- a/app/src/main/java/one/nem/lacerta/MainActivity.java
+++ b/app/src/main/java/one/nem/lacerta/MainActivity.java
@@ -1,32 +1,14 @@
 package one.nem.lacerta;
 
 import androidx.appcompat.app.AppCompatActivity;
-import androidx.fragment.app.FragmentManager;
-import androidx.navigation.NavController;
-import androidx.navigation.fragment.NavHostFragment;
-import androidx.navigation.ui.NavigationUI;
 
 import android.os.Bundle;
 
-import com.google.android.material.bottomnavigation.BottomNavigationView;
-
 public class MainActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
-
-        // デバッグ
-        FragmentManager supportFragmentManager = getSupportFragmentManager();
-        NavHostFragment navHostFragment =
-                (NavHostFragment) supportFragmentManager.findFragmentById(R.id.nav_host_fragment);
-        NavController navController = navHostFragment.getNavController();
-        BottomNavigationView bottomNav = findViewById(R.id.nav_view);
-
-        NavigationUI.setupWithNavController(bottomNav, navController);
-
-        // デバッグ
-
     }
 }
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index ccf4c200..6f43c270 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -8,26 +8,21 @@
 
 
     <androidx.fragment.app.FragmentContainerView
-        android:id="@+id/nav_host_fragment"
+        android:id="@+id/fragmentContainerView2"
         android:name="androidx.navigation.fragment.NavHostFragment"
         android:layout_width="match_parent"
-        android:layout_height="0dp"
-        app:defaultNavHost="true"
-        app:layout_constraintBottom_toTopOf="@id/nav_view"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-
-        app:layout_constraintTop_toTopOf="parent"
-        app:navGraph="@navigation/app_nav_graph" />
-
-    <com.google.android.material.bottomnavigation.BottomNavigationView
-        android:id="@+id/nav_view"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
+        android:layout_height="match_parent"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:menu="@menu/bottom_menu">
+        app:layout_constraintTop_toTopOf="parent"
+
+        app:defaultNavHost="true"
+        app:navGraph="@navigation/app_nav_graph"/>
+
+    <com.google.android.material.bottomnavigation.BottomNavigationView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" >
 
 
     </com.google.android.material.bottomnavigation.BottomNavigationView>
diff --git a/app/src/main/res/layout/app_fragment_blank.xml b/app/src/main/res/layout/app_fragment_blank.xml
deleted file mode 100644
index f397bdba..00000000
--- a/app/src/main/res/layout/app_fragment_blank.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context=".AppBlankFragment">
-
-    <!-- TODO: Update blank fragment layout -->
-    <TextView
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:text="@string/hello_blank_fragment" />
-
-</FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/menu/bottom_menu.xml b/app/src/main/res/menu/bottom_menu.xml
index b22aa058..dac74b82 100644
--- a/app/src/main/res/menu/bottom_menu.xml
+++ b/app/src/main/res/menu/bottom_menu.xml
@@ -2,11 +2,7 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
 
     <item
-        android:id="@id/ui_home_nav_graph"
-        android:title="HomeTestUi"/>
-
-    <item
-        android:id="@id/appBlankFragment"
-        android:title="app_fragment_blank"/>
+        android:id="@+id/homeTestUi"
+        android:title="HomeTestUi" />
 
 </menu>
\ No newline at end of file
diff --git a/app/src/main/res/navigation/app_nav_graph.xml b/app/src/main/res/navigation/app_nav_graph.xml
index e1fa1c2f..8941863b 100644
--- a/app/src/main/res/navigation/app_nav_graph.xml
+++ b/app/src/main/res/navigation/app_nav_graph.xml
@@ -1,23 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <navigation xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/app_nav_graph"
-    app:startDestination="@id/appBlankFragment">
+    app:startDestination="@id/placeholder">
 
     <include app:graph="@navigation/ui_home_nav_graph" />
-    <fragment
-        android:id="@+id/homeTestUi2"
-        android:name="one.nem.ui.home.HomeTestUi"
-        android:label="HomeTestUi" />
-    <fragment
-        android:id="@+id/appBlankFragment"
-        android:name="one.nem.lacerta.AppBlankFragment"
-        android:label="app_fragment_blank"
-        tools:layout="@layout/app_fragment_blank" >
+    <fragment android:id="@+id/placeholder" >
         <action
-            android:id="@+id/action_appBlankFragment_to_homeTestUi22"
-            app:destination="@id/homeTestUi2" />
+            android:id="@+id/action_placeholder_to_ui_home_nav_graph"
+            app:destination="@id/ui_home_nav_graph" />
     </fragment>
 
 
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index b23abf1a..b3b9e87e 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,5 +1,3 @@
 <resources>
     <string name="app_name">Lacerta</string>
-    <!-- TODO: Remove or change this placeholder text -->
-    <string name="hello_blank_fragment">Hello blank fragment</string>
 </resources>
\ No newline at end of file
diff --git a/ui/home/build.gradle b/ui/home/build.gradle
index cd929f1f..def6ac92 100644
--- a/ui/home/build.gradle
+++ b/ui/home/build.gradle
@@ -3,7 +3,7 @@ plugins {
 }
 
 android {
-    namespace 'one.nem.ui.home'
+    namespace 'one.nem.lacerta.ui.home'
     compileSdk 33
 
     defaultConfig {
diff --git a/ui/home/src/main/res/layout/fragment_home_test_ui.xml b/ui/home/src/main/res/layout/fragment_home_test_ui.xml
index d1e581e5..09d8de78 100644
--- a/ui/home/src/main/res/layout/fragment_home_test_ui.xml
+++ b/ui/home/src/main/res/layout/fragment_home_test_ui.xml
@@ -11,10 +11,4 @@
         android:layout_height="match_parent"
         android:text="@string/hello_blank_fragment" />
 
-    <Button
-        android:id="@+id/button"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Button" />
-
 </FrameLayout>
\ No newline at end of file