diff --git a/src/main/java/org/ntlab/citrusserver/resources/FavoritedRest.java b/src/main/java/org/ntlab/citrusserver/resources/FavoritedRest.java
index 9c5714c..fbf2598 100644
--- a/src/main/java/org/ntlab/citrusserver/resources/FavoritedRest.java
+++ b/src/main/java/org/ntlab/citrusserver/resources/FavoritedRest.java
@@ -4,6 +4,7 @@
 import jakarta.ws.rs.core.MediaType;
 import jakarta.ws.rs.core.Response;
 import org.ntlab.citrusserver.repositories.AccountManager;
+import org.ntlab.citrusserver.repositories.BookManager;
 import org.ntlab.citrusserver.repositories.FavoriteManager;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
@@ -14,13 +15,16 @@
 @Component
 
 public class FavoritedRest {
+    private final BookManager bookManager;
     private FavoriteManager favoriteManager;
     private final AccountManager accountManager;
 
+
     @Autowired
-    public FavoritedRest(FavoriteManager favoriteManager, AccountManager accountManager){
+    public FavoritedRest(FavoriteManager favoriteManager, AccountManager accountManager, BookManager bookManager){
         this.favoriteManager = favoriteManager;
         this.accountManager = accountManager;
+        this.bookManager = bookManager;
     }
     @Path("/{account_id}/books/{book_id}/favorited")
     @GET
@@ -36,25 +40,38 @@
     @PUT
     @Produces(MediaType.APPLICATION_FORM_URLENCODED)
     public void putFavorited(@PathParam("account_id") String account_id, @PathParam("book_id") Integer book_id, @PathParam("other_account_id") String other_account_id, @FormParam("token") String token){
-        if(accountManager.checkToken(other_account_id,token)) {
-            favoriteManager.putFavorited(account_id, book_id, other_account_id);
-            favoriteManager.putFavorites(other_account_id, account_id, book_id);//変更点（要検討）
-        }else{
-            var response = Response.status(Response.Status.FORBIDDEN).entity("認証失敗");
-            throw new WebApplicationException(response.build());
+        if(accountManager.getAccount(account_id) != null) {
+            if(accountManager.getAccount(other_account_id) != null){
+                if (accountManager.checkToken(other_account_id, token)) {
+                    if (bookManager.getBook(account_id, book_id) != null) {
+                        favoriteManager.putFavorited(account_id, book_id, other_account_id);
+                        favoriteManager.putFavorites(other_account_id, account_id, book_id);//変更点（要検討）
+                    } else {
+                        var response = Response.status(Response.Status.FORBIDDEN).entity("認証失敗");
+                        throw new WebApplicationException(response.build());
+                    }
+                }
+            }
         }
+
     }
 
     @Path("/{account_id}/books/{book_id}/favorited/{other_account_id}")
     @DELETE
     @Produces(MediaType.APPLICATION_FORM_URLENCODED)
     public void removeFavorited(@PathParam("account_id") String account_id, @PathParam("book_id") Integer book_id, @PathParam("other_account_id") String other_account_id, @QueryParam("token") String token){
-        if(accountManager.checkToken(other_account_id,token)) {
-            favoriteManager.removeFavorited(account_id, book_id, other_account_id);
-            favoriteManager.removeFavorites(other_account_id, account_id, book_id);//変更点（要検討）
-        }else{
-            var response = Response.status(Response.Status.FORBIDDEN).entity("認証失敗");
-            throw new WebApplicationException(response.build());
+        if(accountManager.getAccount(account_id) != null){
+            if(accountManager.getAccount(other_account_id) != null){
+                if(accountManager.checkToken(other_account_id,token)) {
+                    if(bookManager.getBook(account_id,book_id) != null){
+                        favoriteManager.removeFavorited(account_id, book_id, other_account_id);
+                        favoriteManager.removeFavorites(other_account_id, account_id, book_id);//変更点（要検討）
+                    }else{
+                        var response = Response.status(Response.Status.FORBIDDEN).entity("認証失敗");
+                        throw new WebApplicationException(response.build());
+                    }
+                }
+            }
         }
     }
 }