diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index b7692a6..996e5aa 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -28,7 +28,8 @@
             android:name=".MapsActivity"
             android:exported="true"
             android:label="Map"
-            android:windowSoftInputMode="adjustPan">
+            android:windowSoftInputMode="adjustPan"
+            android:screenOrientation="portrait">
 
 <!--             <intent-filter>-->
 <!--             <action android:name="android.intent.action.MAIN" />-->
@@ -39,7 +40,8 @@
         <activity
             android:name=".ShopCreateActivity"
             android:exported="true"
-            android:label="@string/app_name">
+            android:label="@string/app_name"
+            android:screenOrientation="portrait">
             <!-- <intent-filter> -->
             <!-- <action android:name="android.intent.action.MAIN" /> -->
 
@@ -50,7 +52,8 @@
         <activity
             android:name=".GpsActivity"
             android:exported="true"
-            android:label="@string/app_name">
+            android:label="@string/app_name"
+            android:screenOrientation="portrait">
             <!-- <intent-filter> -->
             <!-- <action android:name="android.intent.action.MAIN" /> -->
 
@@ -61,7 +64,8 @@
         <activity
             android:name=".SignUpActivity"
             android:exported="true"
-            android:label="@string/app_name">
+            android:label="@string/app_name"
+            android:screenOrientation="portrait">
 
              <intent-filter>
              <action android:name="android.intent.action.MAIN" />
@@ -73,7 +77,8 @@
         <activity
             android:name=".LoginActivity"
             android:exported="true"
-            android:label="@string/app_name">
+            android:label="@string/app_name"
+            android:screenOrientation="portrait">
 <!--             <intent-filter>-->
 <!--             <action android:name="android.intent.action.MAIN" />-->
 
@@ -85,7 +90,8 @@
         <activity
             android:name=".RequestedActivity"
             android:exported="true"
-            android:label="@string/title_activity_requested">
+            android:label="@string/title_activity_requested"
+            android:screenOrientation="portrait">
 <!--                <intent-filter>-->
 <!--                    <action android:name="android.intent.action.MAIN" />-->
 <!--                    <category android:name="android.intent.category.LAUNCHER" />-->
@@ -93,11 +99,13 @@
         </activity>
         <activity
             android:name=".MyPageEditorActivity"
-            android:exported="false" />
+            android:exported="false"
+            android:screenOrientation="portrait"/>
         <activity
             android:name=".FriendActivity"
             android:exported="false"
-            android:windowSoftInputMode="adjustPan"/>
+            android:windowSoftInputMode="adjustPan"
+            android:screenOrientation="portrait"/>
 <!--        <activity-->
 <!--            android:name=".RequestingActivity"-->
 <!--            android:exported="true"-->
@@ -111,7 +119,8 @@
         <activity
             android:name=".MyPageActivity"
             android:exported="true"
-            android:label="@string/title_activity_my_page">
+            android:label="@string/title_activity_my_page"
+            android:screenOrientation="portrait">
 
 <!--             <intent-filter>-->
 <!--             <action android:name="android.intent.action.MAIN" />-->
@@ -136,7 +145,8 @@
         <activity
             android:name=".TestActivity"
             android:exported="true"
-            android:label="@string/title_activity_test">
+            android:label="@string/title_activity_test"
+            android:screenOrientation="portrait">
 
             <!-- <intent-filter> -->
             <!-- <action android:name="android.intent.action.MAIN" /> -->
@@ -148,7 +158,8 @@
         <activity
             android:name=".PostActivity"
             android:exported="true"
-            android:label="@string/title_activity_post">
+            android:label="@string/title_activity_post"
+            android:screenOrientation="portrait">
 
             <!-- <intent-filter> -->
             <!-- <action android:name="android.intent.action.MAIN" /> -->
@@ -160,7 +171,8 @@
         <activity
             android:name=".ShopActivity"
             android:exported="true"
-            android:label="@string/title_activity_shop">
+            android:label="@string/title_activity_shop"
+            android:screenOrientation="portrait">
 
             <!-- <intent-filter> -->
             <!-- <action android:name="android.intent.action.MAIN" /> -->
diff --git a/app/src/main/java/com/example/nemophila/LoginActivity.java b/app/src/main/java/com/example/nemophila/LoginActivity.java
index c724040..ead2d5e 100644
--- a/app/src/main/java/com/example/nemophila/LoginActivity.java
+++ b/app/src/main/java/com/example/nemophila/LoginActivity.java
@@ -3,16 +3,23 @@
 import androidx.appcompat.app.AppCompatActivity;
 
 import android.content.Intent;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.EditText;
 import android.widget.TextView;
 
-import com.example.nemophila.entities.Account;
 import com.example.nemophila.entities.AccountJson;
 import com.example.nemophila.resources.AccountsRest;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
@@ -21,6 +28,7 @@
 
 @JsonIgnoreProperties(ignoreUnknown=true)
 public class LoginActivity extends AppCompatActivity {
+    private final ExecutorService executor = Executors.newSingleThreadExecutor();
 
     private Retrofit retrofit;
     private AccountsRest AccountsRest;
@@ -38,13 +46,6 @@
 
         //Nemophilaと連携
         nemophila = (Nemophila) this.getApplication();
-        //Nemophilaにtokenとuidがある場合ログイン画面をスキップ
-        if ((nemophila.getUid() != null) && (nemophila.getToken() != null)){
-
-            Intent intent = new Intent(LoginActivity.this,MapsActivity.class);
-            startActivity(intent);
-            return;
-        }
 
         //通信の初期化
         this.retrofit = new Retrofit.Builder()
@@ -83,8 +84,7 @@
                             nemophila.setZoom(defaultZoom);
 
                             //mainに画面遷移
-                            Intent intent = new Intent(LoginActivity.this,MapsActivity.class);
-                            startActivity(intent);
+                            getIcon("http://nitta-lab-www.is.konan-u.ac.jp/nemophila-data/icon" + nemophila.getUid() + ".jpg", false);
                         } else {
                             System.out.println("通信可能：changeBelongsAndMaster: " + response.code());
                                 if (response.code() == 500){
@@ -120,4 +120,29 @@
             }
         });
     }
+
+    private void getIcon(String urlString, boolean isDefault){
+        executor.execute(() -> {
+            try{
+                URL url = new URL(urlString);
+                HttpURLConnection con = (HttpURLConnection) url.openConnection();
+                con.connect();
+
+                InputStream is = con.getInputStream();
+                Bitmap bitmap = BitmapFactory.decodeStream(is);
+                nemophila.setIcon(bitmap);
+
+                Intent intent = new Intent(LoginActivity.this,MapsActivity.class);
+                startActivity(intent);
+            } catch (Exception e){
+                e.printStackTrace();
+                if(!isDefault) {
+                    getIcon("http://nitta-lab-www.is.konan-u.ac.jp/nemophila-data/test01.jpg", true);
+                } else {
+                    Intent intent = new Intent(LoginActivity.this,MapsActivity.class);
+                    startActivity(intent);
+                }
+            }
+        });
+    }
 }
diff --git a/app/src/main/java/com/example/nemophila/SignUpActivity.java b/app/src/main/java/com/example/nemophila/SignUpActivity.java
index 0cba923..ccabe0c 100644
--- a/app/src/main/java/com/example/nemophila/SignUpActivity.java
+++ b/app/src/main/java/com/example/nemophila/SignUpActivity.java
@@ -3,16 +3,23 @@
 import androidx.appcompat.app.AppCompatActivity;
 
 import android.content.Intent;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.EditText;
 import android.widget.TextView;
 
-import com.example.nemophila.entities.Account;
 import com.example.nemophila.entities.AccountJson;
 import com.example.nemophila.resources.AccountsRest;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
@@ -21,6 +28,7 @@
 
 @JsonIgnoreProperties(ignoreUnknown=true)
 public class SignUpActivity extends AppCompatActivity{
+    private final ExecutorService executor = Executors.newSingleThreadExecutor();
 
     private Retrofit retrofit;
     private AccountsRest AccountsRest;
@@ -41,9 +49,7 @@
 
         //Nemophilaにtokenとuidがある場合サインアップ画面をスキップ
         if ((nemophila.getUid() != null) && (nemophila.getToken() != null)){
-
-            Intent intent = new Intent(SignUpActivity.this,MapsActivity.class);
-            startActivity(intent);
+            getIcon("http://nitta-lab-www.is.konan-u.ac.jp/nemophila-data/icon" + nemophila.getUid() + ".jpg", false);
             System.out.println("サインアップ処理をスキップ");
             return;
         }
@@ -86,8 +92,7 @@
                                 nemophila.setZoom(defaultZoom);
 
                                 //mainに画面遷移
-                                Intent intent = new Intent(SignUpActivity.this, MapsActivity.class);
-                                startActivity(intent);
+                                getIcon("http://nitta-lab-www.is.konan-u.ac.jp/nemophila-data/test01.jpg", true);
                             } else {
                                 System.out.println("通信可能：changeBelongsAndMaster: " + response.code());
                                 if (response.code() == 500) {
@@ -116,4 +121,29 @@
             }
         });
     }
+
+    private void getIcon(String urlString, boolean isDefault){
+        executor.execute(() -> {
+            try{
+                URL url = new URL(urlString);
+                HttpURLConnection con = (HttpURLConnection) url.openConnection();
+                con.connect();
+
+                InputStream is = con.getInputStream();
+                Bitmap bitmap = BitmapFactory.decodeStream(is);
+                nemophila.setIcon(bitmap);
+
+                Intent intent = new Intent(SignUpActivity.this,MapsActivity.class);
+                startActivity(intent);
+            } catch (Exception e){
+                e.printStackTrace();
+                if(!isDefault) {
+                    getIcon("http://nitta-lab-www.is.konan-u.ac.jp/nemophila-data/test01.jpg", true);
+                } else {
+                    Intent intent = new Intent(SignUpActivity.this,MapsActivity.class);
+                    startActivity(intent);
+                }
+            }
+        });
+    }
 }
\ No newline at end of file