diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 526b4c2..7b46144 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -7,13 +7,13 @@
         <option name="testRunner" value="GRADLE" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="11" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
             <option value="$PROJECT_DIR$/app" />
           </set>
         </option>
-        <option name="resolveModulePerSourceSet" value="false" />
       </GradleProjectSettings>
     </option>
   </component>
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 eb65b6b..920a89a 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -5,10 +5,11 @@
       <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/layout/activity_main.xml" value="0.25" />
       </map>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 69232cd..9156e1a 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
diff --git a/build.gradle b/build.gradle
index 7cbb664..ad7dc46 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@
         mavenCentral()
     }
     dependencies {
-        classpath "com.android.tools.build:gradle:7.0.3"
+        classpath 'com.android.tools.build:gradle:7.2.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 6fba98d..5285427 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 #Tue Jun 14 13:21:09 JST 2022
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.3-bin.zip
 distributionPath=wrapper/dists
 zipStorePath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME