diff --git a/material/.overrides/hooks/translations.py b/material/.overrides/hooks/translations.py
index 6ed4e68c9..b2f635707 100644
--- a/material/.overrides/hooks/translations.py
+++ b/material/.overrides/hooks/translations.py
@@ -51,7 +51,7 @@ def on_page_markdown(markdown: str, *, page: Page, config: MkDocsConfig, files):
             # Map names and available translations
             names[code] = name
             known[code] = dict(re.findall(
-                r"^  \"([^\"]+)\": \"([^\"]+)\"(?:,|$)?", data,
+                r"^  \"([^\"]+)\": \"([^\"]*)\"(?:,|$)?", data,
                 re.MULTILINE
             ))
 
diff --git a/material/partials/languages/ja.html b/material/partials/languages/ja.html
index 3da47ab9c..4c866d12e 100644
--- a/material/partials/languages/ja.html
+++ b/material/partials/languages/ja.html
@@ -9,7 +9,7 @@
   "announce.dismiss": "非表示にします",
   "blog.archive": "過去の投稿",
   "blog.categories": "カテゴリー",
-  "blog.categories.in": " ",
+  "blog.categories.in": "",
   "blog.continue": "続きを読む",
   "blog.draft": "下書き",
   "blog.index": "ブログトップへ戻る",
diff --git a/src/.overrides/hooks/translations.py b/src/.overrides/hooks/translations.py
index 6ed4e68c9..b2f635707 100644
--- a/src/.overrides/hooks/translations.py
+++ b/src/.overrides/hooks/translations.py
@@ -51,7 +51,7 @@ def on_page_markdown(markdown: str, *, page: Page, config: MkDocsConfig, files):
             # Map names and available translations
             names[code] = name
             known[code] = dict(re.findall(
-                r"^  \"([^\"]+)\": \"([^\"]+)\"(?:,|$)?", data,
+                r"^  \"([^\"]+)\": \"([^\"]*)\"(?:,|$)?", data,
                 re.MULTILINE
             ))
 
diff --git a/src/partials/languages/ja.html b/src/partials/languages/ja.html
index fc38b6803..cce48ec7c 100644
--- a/src/partials/languages/ja.html
+++ b/src/partials/languages/ja.html
@@ -29,7 +29,7 @@
   "announce.dismiss": "非表示にします",
   "blog.archive": "過去の投稿",
   "blog.categories": "カテゴリー",
-  "blog.categories.in": " ",
+  "blog.categories.in": "",
   "blog.continue": "続きを読む",
   "blog.draft": "下書き",
   "blog.index": "ブログトップへ戻る",