diff --git a/src/main/java/org/ntlab/citrusserver/repositories/AccountManager.java b/src/main/java/org/ntlab/citrusserver/repositories/AccountManager.java
index 04c0eba..4278aac 100644
--- a/src/main/java/org/ntlab/citrusserver/repositories/AccountManager.java
+++ b/src/main/java/org/ntlab/citrusserver/repositories/AccountManager.java
@@ -13,7 +13,7 @@
 
 @Repository
 public class AccountManager {
-    private HashMap<String, Account> accounts = new HashMap<String, Account>();
+    private HashMap<String, Account> accounts = new HashMap<String, Account>(); //keyにaccountId,valueにaccount
 
     private HashMap<String, String> accountToken = new HashMap<>(); //keyがaccountId,valueがtoken
 
@@ -26,9 +26,11 @@
     public String newAccount(String accountId, String password) {
         UUID str = UUID.randomUUID();
         String token = str.toString();
-        //accounts.setId(accountId);
-        //accounts.setPassword(password);
-        accountToken.put(accountId, token); //accountIDとtokenをHashMapに入れる
+        Account account = new Account(accountId, password);
+        if(!accounts.containsKey(accountId)) {
+            accounts.put(accountId, account);
+            accountToken.put(accountId, token); //accountIDとtokenをHashMapに入れる
+        }
         return token;
     }
 
@@ -43,18 +45,18 @@
     }
 
     // 指定されたIDの自己紹介を返す(GET)
-    public void AccountIntro() {
-
+    public String AccountIntro(String accountId) {
+        return accounts.get(accountId).getIntroduction();
     }
 
     // 指定されたＩＤのお気に入りの本のリストを返す(GET)
-    public void favoriteBook() {
-
+    public ArrayList<HashMap<String, String>> favoriteBook(String accountId, String token) {
+        return null;
     }
 
     // 指定されたＩＤのお気に入りの本のリストを返す(指定した人物) (GET)
-    public void FavoriteparBook() {
-
+    public ArrayList<Integer> FavoriteBook(String accountId, String otherAccountId, String token) {
+        return null;
     }
 
     // 指定されたIDのアカウントを変更する (PUT)