diff --git a/source/src/main/java/one/nem/lacerta/source/file/FileManager.java b/source/src/main/java/one/nem/lacerta/source/file/FileManager.java
index f620f239..dcc21e52 100644
--- a/source/src/main/java/one/nem/lacerta/source/file/FileManager.java
+++ b/source/src/main/java/one/nem/lacerta/source/file/FileManager.java
@@ -26,6 +26,9 @@ public interface FileManager {
     File getFile(String fileName);
     File getFile(Path path);
 
+    String loadText(String fileName);
+    String loadText(Path path);
+
     boolean isExist(Path path);
     boolean isExist(String fileName);
 
diff --git a/source/src/main/java/one/nem/lacerta/source/file/impl/FileManagerImpl.java b/source/src/main/java/one/nem/lacerta/source/file/impl/FileManagerImpl.java
index 7a25adef..92a4af70 100644
--- a/source/src/main/java/one/nem/lacerta/source/file/impl/FileManagerImpl.java
+++ b/source/src/main/java/one/nem/lacerta/source/file/impl/FileManagerImpl.java
@@ -3,6 +3,7 @@ package one.nem.lacerta.source.file.impl;
 import android.graphics.Bitmap;
 
 import java.io.File;
+import java.io.FileInputStream;
 import java.io.IOException;
 import java.nio.file.DirectoryStream;
 import java.nio.file.Files;
@@ -149,6 +150,30 @@ public class FileManagerImpl implements FileManager {
         return path.toFile();
     }
 
+    @Override
+    public String loadText(String fileName) {
+        try(FileInputStream fileInputStream = new FileInputStream(currentDir.resolve(fileName).toFile())) {
+            byte[] bytes = new byte[fileInputStream.available()];
+            fileInputStream.read(bytes); // TODO-rca: エラーハンドリング
+            return new String(bytes);
+        } catch (IOException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    @Override
+    public String loadText(Path path) {
+        try(FileInputStream fileInputStream = new FileInputStream(path.toFile())) {
+            byte[] bytes = new byte[fileInputStream.available()];
+            fileInputStream.read(bytes); // TODO-rca: エラーハンドリング
+            return new String(bytes);
+        } catch (IOException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
     @Override
     public boolean isExist(Path path) {
         logger.debug("isExist", "called");