diff --git a/ja.json b/ja.json
index 4b313ad..87df61f 100644
--- a/ja.json
+++ b/ja.json
@@ -2026,6 +2026,14 @@
         "UI.TextDisplay.NormalText": "標準",
         "UI.TextDisplay.MonospaceText": "等幅",
 
+        "UI.DocumentDisplay.PageNumber": "{page_number}ページ",
+        "UI.DocumentDisplay.DocumentQuality": "品質",
+        "UI.DocumentDisplay.QualityLow": "低",
+        "UI.DocumentDisplay.QualityMedium": "中",
+        "UI.DocumentDisplay.QualityHigh": "高",
+        "UI.DocumentDisplay.Pages": "ページ数",
+        "UI.DocumentDisplay.ResetZoom": "拡大リセット",
+
         "UI.VideoPlayer.GlobalSettings": "グローバル<br>音量設定",
         "UI.VideoPlayer.LocalSettings": "ローカル<br>音量設定",
         "UI.VideoPlayer.SpatialAudio": "空間<br>音響",