diff --git a/spacy/lang/ja/__init__.py b/spacy/lang/ja/__init__.py
index 371cc0f98..a7ad0846e 100644
--- a/spacy/lang/ja/__init__.py
+++ b/spacy/lang/ja/__init__.py
@@ -46,7 +46,10 @@ def try_sudachi_import(split_mode="A"):
         return tok
     except ImportError:
         raise ImportError(
-            "Japanese support requires SudachiPy: " "https://github.com/WorksApplications/SudachiPy"
+            "Japanese support requires SudachiPy and SudachiDict-core "
+            "(https://github.com/WorksApplications/SudachiPy). "
+            "Install with `pip install sudachipy sudachidict_core` or "
+            "install spaCy with `pip install spacy[ja]`."
         )