diff --git a/CHANGES b/CHANGES
index 359c02d64c9..bad68225c94 100644
--- a/CHANGES
+++ b/CHANGES
@@ -7,6 +7,9 @@ Dependencies
 Incompatible changes
 --------------------
 
+* #11359: Remove long-deprecated aliases for ``MecabSplitter`` and
+  ``DefaultSplitter`` in ``sphinx.search.ja``.
+
 Deprecated
 ----------
 
diff --git a/sphinx/search/ja.py b/sphinx/search/ja.py
index c35126a0b29..88c5061989b 100644
--- a/sphinx/search/ja.py
+++ b/sphinx/search/ja.py
@@ -111,8 +111,6 @@ def __del__(self) -> None:
         if self.ctypes_libmecab:
             self.ctypes_libmecab.mecab_destroy(self.ctypes_mecab)
 
-MeCabBinder = MecabSplitter  # keep backward compatibility until Sphinx-1.6
-
 
 class JanomeSplitter(BaseSplitter):
     def __init__(self, options: dict) -> None:
@@ -507,9 +505,6 @@ def split(self, input: str) -> list[str]:
         return result
 
 
-TinySegmenter = DefaultSplitter  # keep backward compatibility until Sphinx-1.6
-
-
 class SearchJapanese(SearchLanguage):
     """
     Japanese search implementation: uses no stemmer, but word splitting is quite