diff --git a/src/main/java/com/ntlab/irisserver/models/KeywordManager.java b/src/main/java/com/ntlab/irisserver/models/KeywordManager.java
index 2103fd6..c175210 100644
--- a/src/main/java/com/ntlab/irisserver/models/KeywordManager.java
+++ b/src/main/java/com/ntlab/irisserver/models/KeywordManager.java
@@ -1,54 +1,22 @@
 package com.ntlab.irisserver.models;
 
 import org.springframework.stereotype.Component;
-
-import java.io.*;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.List;
 import java.io.BufferedReader;
-import java.io.File;
 import java.io.FileReader;
 import java.io.IOException;
-import org.apache.catalina.core.ApplicationContext;
-import com.ntlab.irisserver.utils.Base64Decode;
-import org.apache.catalina.core.ApplicationContext;
-import org.springframework.context.ApplicationContextAware;
-import org.springframework.beans.BeansException;
-
 import javax.ws.rs.WebApplicationException;
 import javax.ws.rs.core.Response;
 
 
 @Component
 public class KeywordManager {
+
     private static KeywordManager theInstance = null;
     String[] keywords = {"0"};
-            /*= {"りんご",
-    "ごりら","らっぱ","ぱんつ","つみき",};*/
 
-    private List<String> FileRead(String path) {
-        List<String> ss = new ArrayList<String>();
-
-        try {
-            BufferedReader buffReader =
-                    new BufferedReader(new FileReader(path));
-            String s;
-
-            while ((s = buffReader.readLine()) != null) {
-                ss.add(s);
-            }
-            buffReader.close();
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-
-        return ss;
-
-    }
-    
+    //シングルトンパターンでインスタンス作成
     public static KeywordManager getInstance() {
         if(theInstance == null) {
             theInstance = new KeywordManager();
@@ -56,6 +24,8 @@
         return theInstance;
     }
 
+    //------------------------------------------------------------------------------
+    //読み込んだファイルのキーワードをStringの配列で返す
     public String[] getKeywords(String path){
         var response = Response.status(Response.Status.NO_CONTENT);
 
@@ -63,11 +33,34 @@
             response.status(400).entity("パスがありません");
             throw new WebApplicationException(response.build());
         } else if(FileRead(path).size() == 0){
-            response.status(400).entity(path+"に対応したファイルがありません");
+            response.status(404).entity(path+"に対応したファイルがありません");
             throw new WebApplicationException(response.build());
         } else {
             keywords = FileRead(path).toArray(new String[FileRead(path).size()]);
         }
+
         return keywords;
     }
+
+    //-----------------------------------------------------------------------------
+    //pathのファイルを読み込み
+    private List<String> FileRead(String path) {
+        List<String> ss = new ArrayList<String>();
+
+        try {
+            BufferedReader buffReader = new BufferedReader(new FileReader(path));
+            String s;
+            while ((s = buffReader.readLine()) != null) {
+                ss.add(s);
+            }
+
+            buffReader.close();
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return ss;
+    }
+
 }