diff --git a/src/main/java/org/ntlab/nemophila/models/accounts/Account.java b/src/main/java/org/ntlab/nemophila/models/accounts/Account.java
index fc90081..8e9a2fd 100644
--- a/src/main/java/org/ntlab/nemophila/models/accounts/Account.java
+++ b/src/main/java/org/ntlab/nemophila/models/accounts/Account.java
@@ -108,7 +108,7 @@
 
     private String confirmDate() {
         Date date = new Date();
-        SimpleDateFormat f = new SimpleDateFormat("yy/MM/dd");
+        SimpleDateFormat f = new SimpleDateFormat("yyyy/MM/dd");
 
         String time = f.format(date);
         return time;
diff --git a/src/main/java/org/ntlab/nemophila/resources/accounts/AccountPostsRest.java b/src/main/java/org/ntlab/nemophila/resources/accounts/AccountPostsRest.java
index 3345ac4..5f259a5 100644
--- a/src/main/java/org/ntlab/nemophila/resources/accounts/AccountPostsRest.java
+++ b/src/main/java/org/ntlab/nemophila/resources/accounts/AccountPostsRest.java
@@ -9,6 +9,7 @@
 
 import javax.ws.rs.*;
 import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
 import java.util.Collection;
 
 @Component
@@ -53,15 +54,12 @@
         AccountManager am = AccountManager.getInstance();
         Account account = am.getAccount(uid);
 
-        /*
-         （対象のアカウントインスタンスが）
-         存在する場合：全投稿の情報を取得し、それらを返す
-         存在しない場合：何も返さない
-        */
         if (account != null) {
             return account.getPosts();
+        } else {
+            var response = Response.status(Response.Status.NO_CONTENT);
+            response.status(404).entity("アカウントが存在しません");
+            throw new WebApplicationException(response.build());
         }
-
-        return null;
     }
 }
diff --git a/src/main/java/org/ntlab/nemophila/resources/accounts/LoginRest.java b/src/main/java/org/ntlab/nemophila/resources/accounts/LoginRest.java
index 8f06844..11f0628 100644
--- a/src/main/java/org/ntlab/nemophila/resources/accounts/LoginRest.java
+++ b/src/main/java/org/ntlab/nemophila/resources/accounts/LoginRest.java
@@ -6,6 +6,7 @@
 
 import javax.ws.rs.*;
 import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
 
 @Component
 @Path("/accounts")
@@ -20,10 +21,12 @@
 
         if (ac.getPw().equals(pw)) {
             ac = am.updateAccount(uid);
+            return ac;
         } else {
             System.out.println("Error : Miss match pw");
+            var response = Response.status(Response.Status.NO_CONTENT);
+            response.status(401).entity("pwが違います");
+            throw new WebApplicationException(response.build());
         }
-
-        return ac;
     }
 }
diff --git a/src/main/java/org/ntlab/nemophila/resources/accounts/RequestedRest.java b/src/main/java/org/ntlab/nemophila/resources/accounts/RequestedRest.java
index a4e5e80..4438b22 100644
--- a/src/main/java/org/ntlab/nemophila/resources/accounts/RequestedRest.java
+++ b/src/main/java/org/ntlab/nemophila/resources/accounts/RequestedRest.java
@@ -51,7 +51,7 @@
             fm.removeRequested(acFrom);
             fmFrom.removeRequesting(ac);
             fmFrom.removeRequested(ac);
-        }else{
+        } else {
             var response = Response.status(Response.Status.NO_CONTENT);
             response.status(401).entity("認証に失敗しました");
             throw new WebApplicationException(response.build());
diff --git a/src/main/java/org/ntlab/nemophila/resources/accounts/RequestingRest.java b/src/main/java/org/ntlab/nemophila/resources/accounts/RequestingRest.java
index cbea99a..d8dfb44 100644
--- a/src/main/java/org/ntlab/nemophila/resources/accounts/RequestingRest.java
+++ b/src/main/java/org/ntlab/nemophila/resources/accounts/RequestingRest.java
@@ -92,7 +92,7 @@
         if(token.equals(acToken)) {
             fm.removeRequesting(acTo);
             fmTo.removeRequested(ac);
-        }else{
+        } else {
             var response = Response.status(Response.Status.NO_CONTENT);
             response.status(401).entity("認証に失敗しました");
             throw new WebApplicationException(response.build());