Add ja split (48008 rows, source: manifest-ja.jsonl)

README.md

@@ -36,7 +36,7 @@ dataset_info:
   - name: test
     num_bytes: 351272872
     num_examples: 4853
-  download_size: 2662193741
+  download_size: 2662230129
   dataset_size: 3109279383
 configs:
 - config_name: en