diff --git a/Siv3D/include/Siv3D/FontAsset.hpp b/Siv3D/include/Siv3D/FontAsset.hpp
index 092e2a0d8..468018d0a 100644
--- a/Siv3D/include/Siv3D/FontAsset.hpp
+++ b/Siv3D/include/Siv3D/FontAsset.hpp
@@ -56,9 +56,9 @@ namespace s3d
 		[[nodiscard]]
 		static bool IsRegistered(AssetNameView name);
 
-		static bool Load(AssetNameView name, const String& preloadText = U"");
+		static bool Load(AssetNameView name, StringView preloadText = U"");
 
-		static void LoadAsync(AssetNameView name, const String& preloadText = U"");
+		static void LoadAsync(AssetNameView name, StringView preloadText = U"");
 
 		/// @brief 指定したフォントアセットのロードが完了するまで待機します。
 		/// @param name フォントアセット名
diff --git a/Siv3D/src/Siv3D/Asset/CAsset.cpp b/Siv3D/src/Siv3D/Asset/CAsset.cpp
index fa9162f75..7c1a0f089 100644
--- a/Siv3D/src/Siv3D/Asset/CAsset.cpp
+++ b/Siv3D/src/Siv3D/Asset/CAsset.cpp
@@ -113,7 +113,7 @@ namespace s3d
 		return m_assetLists[FromEnum(assetType)].contains(name);
 	}
 
-	bool CAsset::load(const AssetType assetType, const AssetNameView name, const String& hint)
+	bool CAsset::load(const AssetType assetType, const AssetNameView name, const StringView hint)
 	{
 		auto& assetList = m_assetLists[FromEnum(assetType)];
 		const auto it = assetList.find(name);
@@ -124,10 +124,10 @@ namespace s3d
 			return false;
 		}
 
-		return it->second->load(hint);
+		return it->second->load(String{ hint });
 	}
 
-	void CAsset::loadAsync(const AssetType assetType, const AssetNameView name, const String& hint)
+	void CAsset::loadAsync(const AssetType assetType, const AssetNameView name, const StringView hint)
 	{
 		auto& assetList = m_assetLists[FromEnum(assetType)];
 		const auto it = assetList.find(name);
@@ -138,7 +138,7 @@ namespace s3d
 			return;
 		}
 
-		it->second->loadAsync(hint);
+		it->second->loadAsync(String{ hint });
 	}
 
 	void CAsset::wait(const AssetType assetType, const AssetNameView name)
diff --git a/Siv3D/src/Siv3D/Asset/CAsset.hpp b/Siv3D/src/Siv3D/Asset/CAsset.hpp
index 164a6139b..43cdd396e 100644
--- a/Siv3D/src/Siv3D/Asset/CAsset.hpp
+++ b/Siv3D/src/Siv3D/Asset/CAsset.hpp
@@ -32,9 +32,9 @@ namespace s3d
 
 		bool isRegistered(AssetType assetType, AssetNameView name) const override;
 
-		bool load(AssetType assetType, AssetNameView name, const String& hint) override;
+		bool load(AssetType assetType, AssetNameView name, StringView hint) override;
 
-		void loadAsync(AssetType assetType, AssetNameView name, const String& hint) override;
+		void loadAsync(AssetType assetType, AssetNameView name, StringView hint) override;
 
 		void wait(AssetType assetType, AssetNameView name) override;
 
diff --git a/Siv3D/src/Siv3D/Asset/IAsset.hpp b/Siv3D/src/Siv3D/Asset/IAsset.hpp
index 469541ea3..21ee902a2 100644
--- a/Siv3D/src/Siv3D/Asset/IAsset.hpp
+++ b/Siv3D/src/Siv3D/Asset/IAsset.hpp
@@ -45,9 +45,9 @@ namespace s3d
 
 		virtual bool isRegistered(AssetType assetType, AssetNameView name) const = 0;
 
-		virtual bool load(AssetType assetType, AssetNameView name, const String& hint) = 0;
+		virtual bool load(AssetType assetType, AssetNameView name, StringView hint) = 0;
 
-		virtual void loadAsync(AssetType assetType, AssetNameView name, const String& hint) = 0;
+		virtual void loadAsync(AssetType assetType, AssetNameView name, StringView hint) = 0;
 
 		virtual void wait(AssetType assetType, AssetNameView name) = 0;
 
diff --git a/Siv3D/src/Siv3D/FontAsset/SivFontAsset.cpp b/Siv3D/src/Siv3D/FontAsset/SivFontAsset.cpp
index 9bf282e49..9a285d356 100644
--- a/Siv3D/src/Siv3D/FontAsset/SivFontAsset.cpp
+++ b/Siv3D/src/Siv3D/FontAsset/SivFontAsset.cpp
@@ -134,12 +134,12 @@ namespace s3d
 		return SIV3D_ENGINE(Asset)->isRegistered(AssetType::Font, name);
 	}
 
-	bool FontAsset::Load(const AssetNameView name, const String& preloadText)
+	bool FontAsset::Load(const AssetNameView name, const StringView preloadText)
 	{
 		return SIV3D_ENGINE(Asset)->load(AssetType::Font, name, preloadText);
 	}
 
-	void FontAsset::LoadAsync(const AssetNameView name, const String& preloadText)
+	void FontAsset::LoadAsync(const AssetNameView name, const StringView preloadText)
 	{
 		SIV3D_ENGINE(Asset)->loadAsync(AssetType::Font, name, preloadText);
 	}