diff --git a/app/src/main/java/com/example/sprout/refactor/activity/RegistrationActivity.java b/app/src/main/java/com/example/sprout/refactor/activity/RegistrationActivity.java
index 2b82507..7bc1441 100644
--- a/app/src/main/java/com/example/sprout/refactor/activity/RegistrationActivity.java
+++ b/app/src/main/java/com/example/sprout/refactor/activity/RegistrationActivity.java
@@ -1,29 +1,21 @@
 package com.example.sprout.refactor.activity;
 
-import android.content.Intent;
 import android.databinding.DataBindingUtil;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.widget.Toast;
 
 import com.example.sprout.R;
 import com.example.sprout.databinding.RfActivityRegistrationBinding;
 import com.example.sprout.refactor.viewmodel.RegistrationViewModel;
 
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.schedulers.Schedulers;
-
 /**
  * アカウント登録のActivity
  *
  * @author matsumoto_k
  */
-public class RegistrationActivity extends AppCompatActivity {
+public class RegistrationActivity extends BaseActivity {
 
     private RfActivityRegistrationBinding binding = null;
     private RegistrationViewModel registrationViewModel = null;
-    private final CompositeDisposable subscriptions = new CompositeDisposable();
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -37,48 +29,12 @@
     @Override
     protected void onResume() {
         super.onResume();
-        subscribe();
+        addUiObserver(registrationViewModel);
     }
 
     @Override
     protected void onPause() {
         super.onPause();
-        dispose();
-    }
-
-    private void subscribe() {
-        // トーストの購読
-        subscriptions.add(
-                registrationViewModel.getToastMessanger()
-                        .observeOn(AndroidSchedulers.mainThread())
-                        .subscribe(toastMessage -> {
-                            switch (toastMessage.getLength()) {
-                                case SHORT:
-                                    Toast.makeText(this, toastMessage.getMessage(), Toast.LENGTH_SHORT).show();
-                                    break;
-                                case LONG:
-                                    Toast.makeText(this, toastMessage.getMessage(), Toast.LENGTH_LONG).show();
-                                    break;
-                            }
-                        })
-        );
-        // 画面遷移の購読
-        subscriptions.add(
-                registrationViewModel.getNavigationMessenger()
-                        .observeOn(Schedulers.computation())
-                        .subscribe(navigationMessage -> {
-                            switch (navigationMessage.getType()) {
-                                case Start:
-                                    startActivity(new Intent(RegistrationActivity.this, navigationMessage.getClazz()));
-                                    break;
-                                case Finsih:
-                                    finish();
-                            }
-                        })
-        );
-    }
-
-    private void dispose() {
-        subscriptions.dispose();
+        removeUiObserver();
     }
 }