diff --git a/Harmonia.WinUI/Assets/Fonts/Lexend-Black.ttf b/Harmonia.WinUI/Assets/Fonts/Lexend-Black.ttf
new file mode 100644
index 0000000..ff44480
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diff --git a/Harmonia.WinUI/Assets/Fonts/Lexend-Bold.ttf b/Harmonia.WinUI/Assets/Fonts/Lexend-Bold.ttf
new file mode 100644
index 0000000..97614b9
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diff --git a/Harmonia.WinUI/Assets/Fonts/Lexend-ExtraBold.ttf b/Harmonia.WinUI/Assets/Fonts/Lexend-ExtraBold.ttf
new file mode 100644
index 0000000..641ab9b
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diff --git a/Harmonia.WinUI/Assets/Fonts/Lexend-ExtraLight.ttf b/Harmonia.WinUI/Assets/Fonts/Lexend-ExtraLight.ttf
new file mode 100644
index 0000000..fececa0
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diff --git a/Harmonia.WinUI/Assets/Fonts/Lexend-Light.ttf b/Harmonia.WinUI/Assets/Fonts/Lexend-Light.ttf
new file mode 100644
index 0000000..1b67c78
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diff --git a/Harmonia.WinUI/Assets/Fonts/Lexend-Medium.ttf b/Harmonia.WinUI/Assets/Fonts/Lexend-Medium.ttf
new file mode 100644
index 0000000..a56f1e9
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diff --git a/Harmonia.WinUI/Assets/Fonts/Lexend-Regular.ttf b/Harmonia.WinUI/Assets/Fonts/Lexend-Regular.ttf
new file mode 100644
index 0000000..b869458
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diff --git a/Harmonia.WinUI/Assets/Fonts/Lexend-SemiBold.ttf b/Harmonia.WinUI/Assets/Fonts/Lexend-SemiBold.ttf
new file mode 100644
index 0000000..436b93b
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diff --git a/Harmonia.WinUI/Assets/Fonts/Lexend-Thin.ttf b/Harmonia.WinUI/Assets/Fonts/Lexend-Thin.ttf
new file mode 100644
index 0000000..3bd5c47
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diff --git a/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Black.ttf b/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Black.ttf
new file mode 100644
index 0000000..0e33dde
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diff --git a/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Bold.ttf b/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Bold.ttf
new file mode 100644
index 0000000..26a47bb
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diff --git a/Harmonia.WinUI/Assets/Fonts/NotoSansJP-ExtraBold.ttf b/Harmonia.WinUI/Assets/Fonts/NotoSansJP-ExtraBold.ttf
new file mode 100644
index 0000000..8435967
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diff --git a/Harmonia.WinUI/Assets/Fonts/NotoSansJP-ExtraLight.ttf b/Harmonia.WinUI/Assets/Fonts/NotoSansJP-ExtraLight.ttf
new file mode 100644
index 0000000..df421ba
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diff --git a/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Light.ttf b/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Light.ttf
new file mode 100644
index 0000000..7e8c292
Binary files /dev/null and b/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Light.ttf differ
diff --git a/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Medium.ttf b/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Medium.ttf
new file mode 100644
index 0000000..f107339
Binary files /dev/null and b/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Medium.ttf differ
diff --git a/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Regular.ttf b/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Regular.ttf
new file mode 100644
index 0000000..d13df30
Binary files /dev/null and b/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Regular.ttf differ
diff --git a/Harmonia.WinUI/Assets/Fonts/NotoSansJP-SemiBold.ttf b/Harmonia.WinUI/Assets/Fonts/NotoSansJP-SemiBold.ttf
new file mode 100644
index 0000000..2a24dc7
Binary files /dev/null and b/Harmonia.WinUI/Assets/Fonts/NotoSansJP-SemiBold.ttf differ
diff --git a/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Thin.ttf b/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Thin.ttf
new file mode 100644
index 0000000..b3d4cf4
Binary files /dev/null and b/Harmonia.WinUI/Assets/Fonts/NotoSansJP-Thin.ttf differ
diff --git a/Harmonia.WinUI/Harmonia.WinUI.csproj b/Harmonia.WinUI/Harmonia.WinUI.csproj
index 2a21b7a..193b79e 100644
--- a/Harmonia.WinUI/Harmonia.WinUI.csproj
+++ b/Harmonia.WinUI/Harmonia.WinUI.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 	<PropertyGroup>
 		<OutputType>WinExe</OutputType>
 		<TargetFramework>net10.0-windows10.0.26100.0</TargetFramework>
@@ -14,6 +14,7 @@
 		<WindowsAppSDKSelfContained>true</WindowsAppSDKSelfContained>
 		<Nullable>enable</Nullable>
 	</PropertyGroup>
+	
 	<ItemGroup>
 	  <None Remove="Resources\Styles.xaml" />
 	  <None Remove="Views\PlayerView.xaml" />
@@ -30,6 +31,10 @@
 		<Content Include="Assets\Wide310x150Logo.scale-200.png" />
 	</ItemGroup>
 
+	<ItemGroup>
+		<Content Include="Assets\Fonts\*.ttf" />
+	</ItemGroup>
+
 	<ItemGroup>
 		<Manifest Include="$(ApplicationManifest)" />
 	</ItemGroup>
diff --git a/Harmonia.WinUI/Resources/Styles.xaml b/Harmonia.WinUI/Resources/Styles.xaml
index f1254ea..637a811 100644
--- a/Harmonia.WinUI/Resources/Styles.xaml
+++ b/Harmonia.WinUI/Resources/Styles.xaml
@@ -4,29 +4,34 @@
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
 
     <!-- Global Font -->
+    <FontFamily x:Key="AppFontFamily">ms-appx:///Assets/Fonts/Lexend-Regular.ttf#Lexend, ms-appx:///Assets/Fonts/NotoSansJP-Regular.ttf#Noto Sans JP</FontFamily>
+    <FontFamily x:Key="AppFontFamilyMedium">ms-appx:///Assets/Fonts/Lexend-Medium.ttf#Lexend, ms-appx:///Assets/Fonts/NotoSansJP-Medium.ttf#Noto Sans JP</FontFamily>
+    <FontFamily x:Key="AppFontFamilySemiBold">ms-appx:///Assets/Fonts/Lexend-SemiBold.ttf#Lexend, ms-appx:///Assets/Fonts/NotoSansJP-SemiBold.ttf#Noto Sans JP</FontFamily>
+    <FontFamily x:Key="AppFontFamilyBold">ms-appx:///Assets/Fonts/Lexend-Bold.ttf#Lexend, ms-appx:///Assets/Fonts/NotoSansJP-Bold.ttf#Noto Sans JP</FontFamily>
+
     <Style TargetType="TextBlock">
-        <Setter Property="FontFamily" Value="Lexend,Noto Sans JP" />
+        <Setter Property="FontFamily" Value="{StaticResource AppFontFamily}" />
     </Style>
 
     <Style TargetType="TextBox" BasedOn="{StaticResource DefaultTextBoxStyle}">
-        <Setter Property="FontFamily" Value="Lexend,Noto Sans JP" />
+        <Setter Property="FontFamily" Value="{StaticResource AppFontFamily}" />
     </Style>
 
     <Style TargetType="MenuFlyoutItem" BasedOn="{StaticResource DefaultMenuFlyoutItemStyle}">
-        <Setter Property="FontFamily" Value="Lexend,Noto Sans JP" />
+        <Setter Property="FontFamily" Value="{StaticResource AppFontFamily}" />
     </Style>
 
     <Style TargetType="MenuFlyoutSubItem" BasedOn="{StaticResource DefaultMenuFlyoutSubItemStyle}">
-        <Setter Property="FontFamily" Value="Lexend,Noto Sans JP" />
+        <Setter Property="FontFamily" Value="{StaticResource AppFontFamily}" />
     </Style>
 
     <Style TargetType="ToggleMenuFlyoutItem" BasedOn="{StaticResource DefaultToggleMenuFlyoutItemStyle}">
-        <Setter Property="FontFamily" Value="Lexend,Noto Sans JP" />
+        <Setter Property="FontFamily" Value="{StaticResource AppFontFamily}" />
     </Style>
 
 
     <Style TargetType="ListViewItem" BasedOn="{StaticResource DefaultListViewItemStyle}">
-        <Setter Property="FontFamily" Value="Lexend,Noto Sans JP" />
+        <Setter Property="FontFamily" Value="{StaticResource AppFontFamily}" />
     </Style>
 
     <!-- Premium Palette (from Harmonia icon set) -->
@@ -92,7 +97,7 @@
         <Setter Property="Background" Value="{StaticResource PremiumTileGradient}"/>
         <Setter Property="Padding" Value="14,8"/>
         <Setter Property="CornerRadius" Value="12"/>
-        <Setter Property="FontFamily" Value="Lexend,Noto Sans JP"/>
+        <Setter Property="FontFamily" Value="{StaticResource AppFontFamily}"/>
         <Setter Property="HorizontalContentAlignment" Value="Center"/>
         <Setter Property="VerticalContentAlignment" Value="Center"/>
         <Setter Property="Template">
diff --git a/Harmonia.WinUI/Views/PlayerView.xaml b/Harmonia.WinUI/Views/PlayerView.xaml
index c4c449a..57c435b 100644
--- a/Harmonia.WinUI/Views/PlayerView.xaml
+++ b/Harmonia.WinUI/Views/PlayerView.xaml
@@ -52,6 +52,7 @@
         </Style>
         <Style x:Key="SongTitleTextBlock" TargetType="TextBlock">
             <Setter Property="FontSize" Value="16"/>
+            <Setter Property="FontFamily" Value="{StaticResource AppFontFamilySemiBold}"/>
             <Setter Property="FontWeight" Value="SemiBold"/>
             <Setter Property="TextTrimming" Value="CharacterEllipsis"/>
             <Setter Property="Foreground" Value="{StaticResource SongItemTitleBrush}"/>
@@ -137,7 +138,7 @@
                     <Canvas Background="#19000000"></Canvas>
                 </Grid>
                 <StackPanel VerticalAlignment="Center">
-                    <TextBlock Foreground="{StaticResource SongItemTitleBrush2}" FontWeight="SemiBold" FontSize="16" Text="{Binding Song, Converter={StaticResource SongTitle}}"></TextBlock>
+                    <TextBlock Foreground="{StaticResource SongItemTitleBrush2}" FontFamily="{StaticResource AppFontFamilySemiBold}" FontWeight="SemiBold" FontSize="16" Text="{Binding Song, Converter={StaticResource SongTitle}}"></TextBlock>
                     <TextBlock Foreground="{StaticResource SongItemSubtitleBrush2}" FontSize="14" Text="{Binding Song.Artists, Converter={StaticResource ArtistsToString}}"></TextBlock>
                     <TextBlock Foreground="{StaticResource SongItemSubtitleBrush2}" FontSize="14" Text="{Binding Song.Album}"></TextBlock>
                     <TextBlock Foreground="#777" FontSize="12"  Visibility="{Binding Song, Converter={StaticResource NullVisibility}}">
diff --git a/Harmonia.WinUI/Views/PlaylistDetailView.xaml b/Harmonia.WinUI/Views/PlaylistDetailView.xaml
index 33695b3..58d4952 100644
--- a/Harmonia.WinUI/Views/PlaylistDetailView.xaml
+++ b/Harmonia.WinUI/Views/PlaylistDetailView.xaml
@@ -43,6 +43,7 @@
         <!-- Song Item Title Text Block -->
         <Style x:Key="SongTitleTextBlock" TargetType="TextBlock">
             <Setter Property="Foreground" Value="{StaticResource SongItemTitleBrush}"/>
+            <Setter Property="FontFamily" Value="{StaticResource AppFontFamilyMedium}"/>
             <Setter Property="FontSize" Value="15"/>
             <Setter Property="FontWeight" Value="Medium"/>
             <Setter Property="LineStackingStrategy" Value="BlockLineHeight"/>
@@ -237,7 +238,7 @@
                             <Setter Property="Background" Value="Transparent"></Setter>
                         </Style>
                     </MenuFlyout.MenuFlyoutPresenterStyle>
-                    <MenuFlyoutItem Text="Play" FontWeight="SemiBold" Command="{Binding PlaySongCommand}">
+                    <MenuFlyoutItem Text="Play" FontFamily="{StaticResource AppFontFamilySemiBold}" FontWeight="SemiBold" Command="{Binding PlaySongCommand}">
                         <MenuFlyoutItem.Icon>
                             <PathIcon Data="{StaticResource PlayIcon}"></PathIcon>
                         </MenuFlyoutItem.Icon>
diff --git a/Harmonia.WinUI/Views/PlaylistsView.xaml b/Harmonia.WinUI/Views/PlaylistsView.xaml
index 5e015d5..3441400 100644
--- a/Harmonia.WinUI/Views/PlaylistsView.xaml
+++ b/Harmonia.WinUI/Views/PlaylistsView.xaml
@@ -60,6 +60,7 @@
 
         <Style x:Key="SelectedPlaylistTitleTextBlock" TargetType="TextBlock" BasedOn="{StaticResource PlaylistTitleTextBlock}">
             <Setter Property="Foreground" Value="{StaticResource AccentTextFillColorPrimaryBrush}"/>
+            <Setter Property="FontFamily" Value="{StaticResource AppFontFamilyMedium}"/>
             <Setter Property="FontWeight" Value="Medium"/>
         </Style>