diff --git a/.gitignore b/.gitignore
index 979e132..7f1f4b2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@ out
 android/.gradle
 android/app/.externalNativeBuild
 android/app/build
+android/app/src/main/assets
 android/build
 .ccls-cache
 .dir-locals.el
diff --git a/android/app/build.gradle b/android/app/build.gradle
index 4499d16..521982f 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -39,7 +39,6 @@ android {
     if (!project.hasProperty('EXCLUDE_NATIVE_LIBS')) {
         sourceSets.main {
             jniLibs.srcDir 'libs'
-            assets.srcDir '../../fonts'
         }
         aaptOptions {
             // Disable asset compression for fonts.
diff --git a/android/app/jni/CMakeLists.txt b/android/app/jni/CMakeLists.txt
index 4803f45..8e84ae4 100644
--- a/android/app/jni/CMakeLists.txt
+++ b/android/app/jni/CMakeLists.txt
@@ -1,6 +1,7 @@
 cmake_minimum_required(VERSION 3.13)
 
 project(GAME)
+set(PROJECT_ROOT_DIR ../../..)
 
 include(FetchContent)
 FetchContent_Declare(
@@ -46,4 +47,18 @@ if(NOT sdl_mixer_POPULATED)
 endif()
 
 # The main CMakeLists.txt of xsystem35
-add_subdirectory(../../.. xsystem35)
+add_subdirectory(${PROJECT_ROOT_DIR} xsystem35)
+
+# Copy asset files
+set(ASSETS_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../src/main/assets)
+file(MAKE_DIRECTORY ${ASSETS_DIR}/licenses)
+file(COPY_FILE ${PROJECT_ROOT_DIR}/fonts/MTLc3m.ttf ${ASSETS_DIR}/MTLc3m.ttf)
+file(COPY_FILE ${PROJECT_ROOT_DIR}/fonts/mincho.otf ${ASSETS_DIR}/mincho.otf)
+file(COPY_FILE ${PROJECT_ROOT_DIR}/COPYING ${ASSETS_DIR}/licenses/xsystem35)
+file(COPY_FILE ${PROJECT_ROOT_DIR}/fonts/MTLc3m.ttf.license ${ASSETS_DIR}/licenses/MTLc3m)
+file(COPY_FILE ${PROJECT_ROOT_DIR}/fonts/mincho.otf.license ${ASSETS_DIR}/licenses/mincho)
+file(COPY_FILE ${sdl_SOURCE_DIR}/LICENSE.txt ${ASSETS_DIR}/licenses/SDL)
+file(COPY_FILE ${sdl_ttf_SOURCE_DIR}/LICENSE.txt ${ASSETS_DIR}/licenses/SDL_ttf)
+file(COPY_FILE ${sdl_ttf_SOURCE_DIR}/external/freetype/docs/GPLv2.TXT ${ASSETS_DIR}/licenses/freetype)
+file(COPY_FILE ${sdl_ttf_SOURCE_DIR}/external/harfbuzz/COPYING ${ASSETS_DIR}/licenses/harfbuzz)
+file(COPY_FILE ${sdl_mixer_SOURCE_DIR}/LICENSE.txt ${ASSETS_DIR}/licenses/SDL_mixer)
diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index d13334b..50209af 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -94,6 +94,17 @@
             </intent-filter>
             -->
         </activity>
+
+        <activity android:name=".LicensesMenuActivity"
+            android:label="@string/action_licenses"
+            android:parentActivityName=".LauncherActivity"
+            android:exported="false">
+        </activity>
+
+        <activity android:name=".LicensesActivity"
+            android:parentActivityName=".LicensesMenuActivity"
+            android:exported="false">
+        </activity>
     </application>
 
 </manifest>
diff --git a/android/app/src/main/java/io/github/kichikuou/xsystem35/LauncherActivity.kt b/android/app/src/main/java/io/github/kichikuou/xsystem35/LauncherActivity.kt
index cf8ac49..3547c2e 100644
--- a/android/app/src/main/java/io/github/kichikuou/xsystem35/LauncherActivity.kt
+++ b/android/app/src/main/java/io/github/kichikuou/xsystem35/LauncherActivity.kt
@@ -106,6 +106,11 @@ class LauncherActivity : Activity(), LauncherObserver {
                                        SAVEDATA_IMPORT_REQUEST)
                 true
             }
+            R.id.licenses -> {
+                val intent = Intent(this, LicensesMenuActivity::class.java)
+                startActivity(intent)
+                true
+            }
             else -> super.onOptionsItemSelected(item)
         }
     }
diff --git a/android/app/src/main/java/io/github/kichikuou/xsystem35/LicensesActivity.kt b/android/app/src/main/java/io/github/kichikuou/xsystem35/LicensesActivity.kt
new file mode 100644
index 0000000..1a2556a
--- /dev/null
+++ b/android/app/src/main/java/io/github/kichikuou/xsystem35/LicensesActivity.kt
@@ -0,0 +1,23 @@
+package io.github.kichikuou.xsystem35
+
+import android.app.Activity
+import android.os.Bundle
+import android.widget.TextView
+import java.io.BufferedReader
+
+class LicensesActivity : Activity() {
+    companion object {
+        const val EXTRA_DISPLAY_NAME = "DISPLAY_NAME"
+        const val EXTRA_FILE_NAME = "FILE_NAME"
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_licenses)
+
+        actionBar?.title = intent.getStringExtra(EXTRA_DISPLAY_NAME)
+        val path = "licenses/" + intent.getStringExtra(EXTRA_FILE_NAME)
+        val text = assets.open(path).bufferedReader().use(BufferedReader::readText)
+        findViewById<TextView>(R.id.license_text).text = text
+    }
+}
\ No newline at end of file
diff --git a/android/app/src/main/java/io/github/kichikuou/xsystem35/LicensesMenuActivity.kt b/android/app/src/main/java/io/github/kichikuou/xsystem35/LicensesMenuActivity.kt
new file mode 100644
index 0000000..d5c7ded
--- /dev/null
+++ b/android/app/src/main/java/io/github/kichikuou/xsystem35/LicensesMenuActivity.kt
@@ -0,0 +1,38 @@
+package io.github.kichikuou.xsystem35
+
+import android.app.Activity
+import android.content.Intent
+import android.os.Bundle
+import android.widget.ListView
+import android.widget.SimpleAdapter
+
+class LicensesMenuActivity : Activity() {
+    class Entry(val displayName: String, val fileName: String, val url: String)
+    private val entries: ArrayList<Entry> = arrayListOf(
+        Entry("xsystem35-sdl2", "xsystem35", "https://github.com/kichikuou/xsystem35-sdl2"),
+        Entry("SDL", "SDL", "https://www.libsdl.org/"),
+        Entry("SDL_mixer", "SDL_mixer", "https://github.com/libsdl-org/SDL_mixer"),
+        Entry("SDL_ttf", "SDL_ttf", "https://github.com/libsdl-org/SDL_ttf"),
+        Entry("FreeType", "freetype", "https://freetype.org/"),
+        Entry("HarfBuzz", "harfbuzz", "https://harfbuzz.github.io/"),
+        Entry("MotoyaLCedar W3 mono", "MTLc3m", "https://github.com/aosp-mirror/platform_frameworks_base/tree/lollipop-release/data/fonts"),
+        Entry("Source Han Serif", "mincho", "https://github.com/adobe-fonts/source-han-serif/"),
+    )
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_licenses_menu)
+
+        val items = entries.map { mapOf("name" to it.displayName, "url" to it.url)}
+        val listView = findViewById<ListView>(R.id.list)
+        listView.adapter = SimpleAdapter(this, items, android.R.layout.simple_list_item_2,
+            arrayOf("name", "url"), intArrayOf(android.R.id.text1, android.R.id.text2))
+        listView.setOnItemClickListener { _, _, pos, _ ->
+            val intent = Intent(this, LicensesActivity::class.java).apply {
+                putExtra(LicensesActivity.EXTRA_DISPLAY_NAME, entries[pos].displayName)
+                putExtra(LicensesActivity.EXTRA_FILE_NAME, entries[pos].fileName)
+            }
+            startActivity(intent)
+        }
+    }
+}
\ No newline at end of file
diff --git a/android/app/src/main/res/layout/activity_licenses.xml b/android/app/src/main/res/layout/activity_licenses.xml
new file mode 100644
index 0000000..a4200f7
--- /dev/null
+++ b/android/app/src/main/res/layout/activity_licenses.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+    <TextView android:id="@+id/license_text"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        android:padding="20dp" />
+</ScrollView>
\ No newline at end of file
diff --git a/android/app/src/main/res/layout/activity_licenses_menu.xml b/android/app/src/main/res/layout/activity_licenses_menu.xml
new file mode 100644
index 0000000..df3ab57
--- /dev/null
+++ b/android/app/src/main/res/layout/activity_licenses_menu.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent">
+    <ListView android:id="@+id/list"
+        android:layout_width="fill_parent"
+        android:layout_height="fill_parent" />
+</LinearLayout>
\ No newline at end of file
diff --git a/android/app/src/main/res/menu/launcher_menu.xml b/android/app/src/main/res/menu/launcher_menu.xml
index d77b28b..194085b 100644
--- a/android/app/src/main/res/menu/launcher_menu.xml
+++ b/android/app/src/main/res/menu/launcher_menu.xml
@@ -6,4 +6,7 @@
     <item
         android:id="@+id/import_savedata"
         android:title="@string/action_import_save_data" />
+    <item
+        android:id="@+id/licenses"
+        android:title="@string/action_licenses" />
 </menu>
\ No newline at end of file
diff --git a/android/app/src/main/res/values-ja/strings.xml b/android/app/src/main/res/values-ja/strings.xml
index 1c597b8..ae22c52 100644
--- a/android/app/src/main/res/values-ja/strings.xml
+++ b/android/app/src/main/res/values-ja/strings.xml
@@ -3,6 +3,7 @@
     <string name="app_name">xsystem35</string>
     <string name="action_export_save_data">セーブデータをエクスポート</string>
     <string name="action_import_save_data">セーブデータをインポート</string>
+    <string name="action_licenses">オープンソースライセンス</string>
     <string name="cancel">キャンセル</string>
     <string name="cannot_find_ald">System 3.x のファイル (*.ald) が見つかりません。</string>
     <string name="choose_a_file">ファイルを選択</string>
diff --git a/android/app/src/main/res/values/strings.xml b/android/app/src/main/res/values/strings.xml
index 1e2c095..9113823 100644
--- a/android/app/src/main/res/values/strings.xml
+++ b/android/app/src/main/res/values/strings.xml
@@ -2,6 +2,7 @@
     <string name="app_name">xsystem35</string>
     <string name="action_export_save_data">Export Save Files</string>
     <string name="action_import_save_data">Import Save Files</string>
+    <string name="action_licenses">Open source licenses</string>
     <string name="cancel">Cancel</string>
     <string name="cannot_find_ald">Cannot find System 3.x game files (*.ald).</string>
     <string name="choose_a_file">Choose a file</string>