diff --git a/whisperx/transcribe.py b/whisperx/transcribe.py
index 6a2dcb6..fa400a3 100644
--- a/whisperx/transcribe.py
+++ b/whisperx/transcribe.py
@@ -213,6 +213,7 @@ def cli():
             results.append((result, input_audio_path))
     # >> Write
     for result, audio_path in results:
+        result["language"] = align_language
         writer(result, audio_path, writer_args)
 
 if __name__ == "__main__":
diff --git a/whisperx/utils.py b/whisperx/utils.py
index 86beea4..37792d3 100644
--- a/whisperx/utils.py
+++ b/whisperx/utils.py
@@ -123,6 +123,7 @@ TO_LANGUAGE_CODE = {
     "castilian": "es",
 }
 
+LANGUAGES_WITHOUT_SPACES = ["ja", "zh"]
 
 system_encoding = sys.getdefaultencoding()
 
@@ -283,7 +284,10 @@ class SubtitlesWriter(ResultWriter):
                 sstart, ssend, speaker = _[0]
                 subtitle_start = self.format_timestamp(sstart)
                 subtitle_end = self.format_timestamp(ssend)
-                subtitle_text = " ".join([word["word"] for word in subtitle])
+                if result["language"] in LANGUAGES_WITHOUT_SPACES:
+                    subtitle_text = "".join([word["word"] for word in subtitle])
+                else:
+                    subtitle_text = " ".join([word["word"] for word in subtitle])
                 has_timing = any(["start" in word for word in subtitle])
 
                 # add [$SPEAKER_ID]: to each subtitle if speaker is available