diff --git a/src/wave/file.cc b/src/wave/file.cc
index f8003f4..4c7518c 100644
--- a/src/wave/file.cc
+++ b/src/wave/file.cc
@@ -195,6 +195,28 @@ Error File::Open(const std::string& path, OpenMode mode) {
   return impl_->ReadHeader(&headers);
 }
 
+Error File::Open(const std::wstring& path, OpenMode mode) {
+  if (mode == OpenMode::kOut)
+  {
+    impl_->ostream.open(path, std::ios::binary | std::ios::trunc);
+    if (!impl_->ostream.is_open()) {
+      return Error::kFailedToOpen;
+    }
+    return impl_->WriteHeader(0);
+  }
+
+  impl_->istream.open(path, std::ios::binary);
+  if (!impl_->istream.is_open()) {
+    return Error::kFailedToOpen;
+  }
+  HeaderList headers;
+  auto error = headers.Init(path);
+  if (error != kNoError) {
+    return error;
+  }
+  return impl_->ReadHeader(&headers);
+}
+
 uint16_t File::channel_number() const { return impl_->header.fmt.num_channel; }
 void File::set_channel_number(uint16_t channel_number) {
   impl_->header.fmt.num_channel = channel_number;
diff --git a/src/wave/file.h b/src/wave/file.h
index 68f7328..d9f2085 100644
--- a/src/wave/file.h
+++ b/src/wave/file.h
@@ -27,6 +27,7 @@ class File {
    * @brief Open wave file at given path
    */
   Error Open(const std::string& path, OpenMode mode);
+  Error Open(const std::wstring& path, OpenMode mode);
 
   /**
    * @brief Read the entire content of file.
diff --git a/src/wave/header_list.cc b/src/wave/header_list.cc
index 1fe6393..b3a4ef3 100644
--- a/src/wave/header_list.cc
+++ b/src/wave/header_list.cc
@@ -41,6 +41,14 @@ Error HeaderList::Init(const std::string& path) {
   return Error::kNoError;
 }
 
+Error HeaderList::Init(const std::wstring& path) {
+  stream_.open(path, std::ios::binary);
+  if (!stream_.is_open()) {
+    return Error::kFailedToOpen;
+  }
+  return Error::kNoError;
+}
+
 HeaderList::Iterator HeaderList::begin() {
   return HeaderList::Iterator(&stream_, 0);
 }
diff --git a/src/wave/header_list.h b/src/wave/header_list.h
index 70e4fe5..aaf49ac 100644
--- a/src/wave/header_list.h
+++ b/src/wave/header_list.h
@@ -24,6 +24,7 @@ class HeaderList {
   };
 
   Error Init(const std::string& path);
+  Error Init(const std::wstring& path);
   Iterator begin();
   Iterator end();