diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 3d7eabb..7b46144 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -7,7 +7,6 @@
         <option name="testRunner" value="GRADLE" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleHome" value="$PROJECT_DIR$/../../../../gradle-5.4.1" />
         <option name="gradleJvm" value="11" />
         <option name="modules">
           <set>
diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
new file mode 100644
index 0000000..691ca64
--- /dev/null
+++ b/.idea/inspectionProfiles/Project_Default.xml
@@ -0,0 +1,5 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0" is_locked="false">
+    <option name="myName" value="Project Default" />
+  </profile>
+</component>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 3d8a7b5..920a89a 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -5,11 +5,7 @@
       <map>
         <entry key="..\:/Users/Nitta/AndroidStudioProjects/IrisClient/app/src/main/res/layout/activity_main.xml" value="0.20969202898550723" />
         <entry key="..\:/Users/Nitta/StudioProjects/IrisClient/app/src/main/res/layout/activity_main.xml" value="0.266304347826087" />
-        <entry key="..\:/Users/Student/StudioProjects/IrisClient/app/src/main/res/drawable-v24/ic_launcher_foreground.xml" value="0.2685" />
-        <entry key="..\:/Users/Student/StudioProjects/IrisClient/app/src/main/res/layout-land/activity_owner_room.xml" value="0.335" />
-        <entry key="..\:/Users/Student/StudioProjects/IrisClient/app/src/main/res/layout/activity_main.xml" value="0.2635416666666667" />
-        <entry key="..\:/Users/Student/StudioProjects/IrisClient/app/src/main/res/layout/activity_owner_room.xml" value="0.2635416666666667" />
-        <entry key="..\:/Users/Student/StudioProjects/IrisClient/app/src/main/res/layout/recycler_view_item.xml" value="0.2635416666666667" />
+        <entry key="..\:/Users/student/StudioProjects/IrisClient/app/src/main/res/layout/activity_main.xml" value="0.25" />
       </map>
     </option>
   </component>
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 4f8c7b0..a2d6765 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -11,6 +11,7 @@
         android:theme="@style/Theme.IrisClient">
         <activity
             android:name=".MainActivity"
+            android:screenOrientation="landscape"
             android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
diff --git a/app/src/main/java/org/ntlab/irisclient/MainActivity.java b/app/src/main/java/org/ntlab/irisclient/MainActivity.java
index 65ba731..9a29cff 100644
--- a/app/src/main/java/org/ntlab/irisclient/MainActivity.java
+++ b/app/src/main/java/org/ntlab/irisclient/MainActivity.java
@@ -1,5 +1,6 @@
 package org.ntlab.irisclient;
 
+import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
 
 import android.os.Bundle;
@@ -10,5 +11,7 @@
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
+
+        
     }
 }
\ 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 4fc2444..20424f1 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -6,13 +6,27 @@
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-    <TextView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Hello World!"
+    <Button
+        android:id="@+id/create_room"
+        android:layout_width="315dp"
+        android:layout_height="77dp"
+        android:text="ルームの作成"
+        android:textSize="24sp"
         app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintLeft_toLeftOf="parent"
-        app:layout_constraintRight_toRightOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.26" />
 
+    <Button
+        android:id="@+id/entry_room"
+        android:layout_width="315dp"
+        android:layout_height="77dp"
+        android:text="ルームに入る"
+        android:textSize="24sp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/create_room"
+        app:layout_constraintVertical_bias="0.513" />
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file