diff --git a/src/main/java/org/codelibs/fess/app/web/admin/log/AdminLogAction.java b/src/main/java/org/codelibs/fess/app/web/admin/log/AdminLogAction.java
index 2418c9b54..ff3205ec1 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/log/AdminLogAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/log/AdminLogAction.java
@@ -32,6 +32,8 @@ import java.util.stream.Stream;
 import org.codelibs.core.lang.StringUtil;
 import org.codelibs.fess.app.web.base.FessAdminAction;
 import org.codelibs.fess.exception.FessSystemException;
+import org.codelibs.fess.helper.SystemHelper;
+import org.codelibs.fess.util.ComponentUtil;
 import org.codelibs.fess.util.RenderDataUtil;
 import org.lastaflute.di.exception.IORuntimeException;
 import org.lastaflute.web.Execute;
@@ -74,7 +76,8 @@ public class AdminLogAction extends FessAdminAction {
         return redirect(getClass()); // no-op
     }
 
-    private List<Map<String, Object>> getLogFileItems() {
+    public static List<Map<String, Object>> getLogFileItems() {
+        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
         final List<Map<String, Object>> logFileItems = new ArrayList<>();
         final String logFilePath = systemHelper.getLogFilePath();
         if (StringUtil.isNotBlank(logFilePath)) {
diff --git a/src/main/java/org/codelibs/fess/app/web/api/ApiResult.java b/src/main/java/org/codelibs/fess/app/web/api/ApiResult.java
index 5b1871d33..fedc9970a 100644
--- a/src/main/java/org/codelibs/fess/app/web/api/ApiResult.java
+++ b/src/main/java/org/codelibs/fess/app/web/api/ApiResult.java
@@ -17,6 +17,7 @@ package org.codelibs.fess.app.web.api;
 
 import java.util.List;
 import java.util.Locale;
+import java.util.Map;
 import java.util.stream.Collectors;
 
 import org.codelibs.fess.Constants;
@@ -148,6 +149,26 @@ public class ApiResult {
         }
     }
 
+    public static class ApiLogFilesResponse extends ApiResponse {
+        protected List<Map<String, Object>> logfiles;
+        protected long total = 0;
+
+        public ApiLogFilesResponse logfiles(final List<Map<String, Object>> logfiles) {
+            this.logfiles = logfiles;
+            return this;
+        }
+
+        public ApiLogFilesResponse total(final long total) {
+            this.total = total;
+            return this;
+        }
+
+        @Override
+        public ApiResult result() {
+            return new ApiResult(this);
+        }
+    }
+
     public static class ApiErrorResponse extends ApiResponse {
         protected String message;
 
diff --git a/src/main/java/org/codelibs/fess/app/web/api/admin/log/ApiAdminLogAction.java b/src/main/java/org/codelibs/fess/app/web/api/admin/log/ApiAdminLogAction.java
new file mode 100644
index 000000000..f019d4de1
--- /dev/null
+++ b/src/main/java/org/codelibs/fess/app/web/api/admin/log/ApiAdminLogAction.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2012-2017 CodeLibs Project and the Others.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+package org.codelibs.fess.app.web.api.admin.log;
+
+import static org.codelibs.fess.app.web.admin.log.AdminLogAction.getLogFileItems;
+
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Base64;
+import java.util.List;
+import java.util.Map;
+
+import org.codelibs.core.lang.StringUtil;
+import org.codelibs.fess.app.web.api.ApiResult;
+import org.codelibs.fess.app.web.api.admin.FessApiAdminAction;
+import org.lastaflute.web.Execute;
+import org.lastaflute.web.response.JsonResponse;
+import org.lastaflute.web.response.StreamResponse;
+
+/**
+ * @author Keiichi Watanabe
+ */
+public class ApiAdminLogAction extends FessApiAdminAction {
+
+    // ===================================================================================
+    //                                                                      Search Execute
+    //                                                                      ==============
+
+    // GET /api/admin/log/logfiles
+    @Execute
+    public JsonResponse<ApiResult> logfiles() {
+        List<Map<String, Object>> list = getLogFileItems();
+        return asJson(new ApiResult.ApiLogFilesResponse().logfiles(list).total(list.size()).status(ApiResult.Status.OK).result());
+    }
+
+    // GET /api/admin/log/logfile/{id}
+    @Execute
+    public StreamResponse get$logfile(final String id) {
+        final String filename = new String(Base64.getDecoder().decode(id), StandardCharsets.UTF_8).replace("..", "").replaceAll("\\s", "");
+        final String logFilePath = systemHelper.getLogFilePath();
+        if (StringUtil.isNotBlank(logFilePath)) {
+            final Path path = Paths.get(logFilePath, filename);
+            return asStream(filename).contentTypeOctetStream().stream(out -> {
+                try (InputStream in = Files.newInputStream(path)) {
+                    out.write(in);
+                }
+            });
+        }
+        return StreamResponse.asEmptyBody();
+    }
+}