diff --git a/Plugin/abci/Importer/aiContext.cpp b/Plugin/abci/Importer/aiContext.cpp
index 19fdc3cb9..2ffb0b049 100644
--- a/Plugin/abci/Importer/aiContext.cpp
+++ b/Plugin/abci/Importer/aiContext.cpp
@@ -5,6 +5,42 @@
 #include "aiAsync.h"
 
 
+static std::wstring L(const std::string& s)
+{
+    return std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>>().from_bytes(s);
+}
+
+static std::string S(const std::wstring& w)
+{
+    return std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>>().to_bytes(w);
+}
+
+static std::string NormalizePath(const char *in_path)
+{
+    std::wstring path;
+
+    if (in_path != nullptr) {
+        path = L(in_path);
+
+#ifdef _WIN32
+        size_t n = path.length();
+        for (size_t i = 0; i < n; ++i) {
+            auto c = path[i];
+            if (c == L'\\') {
+                path[i] = L'/';
+            }
+            else if (c >= L'A' && c <= L'Z') {
+                path[i] = L'a' + (c - L'A');
+            }
+        }
+#endif
+    }
+
+    return S(path);
+}
+
+
+
 aiContextManager aiContextManager::s_instance;
 
 aiContext* aiContextManager::getContext(int uid)
@@ -32,7 +68,7 @@ void aiContextManager::destroyContext(int uid)
 
 void aiContextManager::destroyContextsWithPath(const char* asset_path)
 {
-    auto path = aiContext::normalizePath(asset_path);
+    auto path = NormalizePath(asset_path);
     for (auto it = s_instance.m_contexts.begin(); it != s_instance.m_contexts.end();) {
         if (it->second->getPath() == path) {
             DebugLog("Unregister context for gameObject with ID %s", it->second->getPath().c_str());
@@ -53,31 +89,6 @@ aiContextManager::~aiContextManager()
 }
 
 
-std::string aiContext::normalizePath(const char *in_path)
-{
-    std::string path;
-
-    if (in_path != nullptr) {
-        path = in_path;
-
-#ifdef _WIN32
-        size_t n = path.length();
-        for (size_t i = 0; i < n; ++i) {
-            char c = path[i];
-            if (c == '\\') {
-                path[i] = '/';
-            }
-            else if (c >= 'A' && c <= 'Z') {
-                path[i] = 'a' + (c - 'A');
-            }
-        }
-#endif
-    }
-
-    return path;
-}
-
-
 aiContext::aiContext(int uid)
     : m_uid(uid)
 {
@@ -176,13 +187,17 @@ void aiContext::reset()
     m_top_node.reset();
     m_timesamplings.clear();
     m_archive.reset();
-    m_path = "";
+
+    m_path.clear();
+    for (auto s : m_streams) { delete s; }
+    m_streams.clear();
+
     // m_config is not reset intentionally
 }
 
 bool aiContext::load(const char *in_path)
 {
-    std::string path = normalizePath(in_path);
+    auto path = NormalizePath(in_path);
 
     DebugLog("aiContext::load: '%s'", path.c_str());
     if (path == m_path && m_archive) {
@@ -205,10 +220,23 @@ bool aiContext::load(const char *in_path)
 
         try {
             DebugLog("Trying to open AbcCoreOgawa::ReadArchive...");
-            m_archive = Abc::IArchive(AbcCoreOgawa::ReadArchive(std::thread::hardware_concurrency()), path);
+
+            // open archive with wstring path and pass it to Abc::IArchive (Abc::IArchive can not use wstring path...)
+            auto wpath = L(path);
+            auto ifs = new std::ifstream(wpath.c_str(), std::ios::in | std::ios::binary);
+            m_streams.push_back(ifs);
+
+            Alembic::AbcCoreOgawa::ReadArchive archive_reader(m_streams);
+            m_archive = Abc::IArchive(archive_reader(m_path), Abc::kWrapExisting, Abc::ErrorHandler::kThrowPolicy);
         }
         catch (Alembic::Util::Exception e) {
             DebugLog("Failed (%s)", e.what());
+
+            // hdf5 archive can not use external stream
+            // (that means if path contains wide characters, we can't open it. I couldn't find solution..)
+            for (auto s : m_streams) { delete s; }
+            m_streams.clear();
+
             try {
                 DebugLog("Trying to open AbcCoreHDF5::ReadArchive...");
                 m_archive = Abc::IArchive(AbcCoreHDF5::ReadArchive(), path);
diff --git a/Plugin/abci/Importer/aiContext.h b/Plugin/abci/Importer/aiContext.h
index 12b862623..523d6d68e 100644
--- a/Plugin/abci/Importer/aiContext.h
+++ b/Plugin/abci/Importer/aiContext.h
@@ -48,9 +48,6 @@ class aiContextManager
 
 class aiContext
 {
-public:
-    static std::string normalizePath(const char *path);
-
 public:
     explicit aiContext(int uid=-1);
     ~aiContext();
@@ -85,6 +82,8 @@ class aiContext
     void reset();
 
     std::string m_path;
+    std::vector<std::istream*> m_streams;
+
     Abc::IArchive m_archive;
     std::unique_ptr<aiObject> m_top_node;
     std::vector<aiTimeSamplingPtr> m_timesamplings;
diff --git a/Plugin/abci/pch.h b/Plugin/abci/pch.h
index 8c0a17cba..691000def 100644
--- a/Plugin/abci/pch.h
+++ b/Plugin/abci/pch.h
@@ -12,7 +12,10 @@
 #include <functional>
 #include <limits>
 #include <sstream>
+#include <fstream>
 #include <type_traits>
+#include <locale>
+#include <codecvt>
 #include <Alembic/AbcCoreAbstract/All.h>
 #include <Alembic/AbcCoreHDF5/All.h>
 #include <Alembic/AbcCoreOgawa/All.h>