diff --git a/frontend/lang/messages/ja-JP.json b/frontend/lang/messages/ja-JP.json
index 87e6c2500054..5f5d63e390db 100644
--- a/frontend/lang/messages/ja-JP.json
+++ b/frontend/lang/messages/ja-JP.json
@@ -10,7 +10,7 @@
     "default-group": "デフォルトグループ",
     "demo": "体験版",
     "demo-status": "体験版ステータス",
-    "development": "Development",
+    "development": "開発",
     "docs": "ドキュメント",
     "download-log": "ログをダウンロード",
     "download-recipe-json": "Last Scraped JSON",
@@ -42,8 +42,8 @@
     "category-deleted": "カテゴリを削除しました。",
     "category-deletion-failed": "カテゴリの削除に失敗しました。",
     "category-filter": "カテゴリフィルタ",
-    "category-update-failed": "Category update failed",
-    "category-updated": "Category updated",
+    "category-update-failed": "カテゴリの更新に失敗しました",
+    "category-updated": "カテゴリーを更新しました",
     "uncategorized-count": "カテゴリなし {count}",
     "create-a-category": "カテゴリを作成",
     "category-name": "カテゴリ名",
@@ -96,8 +96,8 @@
     "duplicate": "複製",
     "edit": "編集",
     "enabled": "有効",
-    "exception": "Exception",
-    "failed-count": "Failed: {count}",
+    "exception": "例外",
+    "failed-count": "失敗: {count}",
     "failure-uploading-file": "Failure uploading file",
     "favorites": "お気に入り",
     "field-required": "Field Required",
@@ -172,7 +172,7 @@
     "id": "Id",
     "owner": "Owner",
     "date-added": "追加日",
-    "none": "None",
+    "none": "なし",
     "run": "Run",
     "menu": "メニュー",
     "a-name-is-required": "名前は必須です。",
@@ -200,9 +200,9 @@
     "unsaved-changes": "You have unsaved changes. Do you want to save before leaving? Okay to save, Cancel to discard changes."
   },
   "group": {
-    "are-you-sure-you-want-to-delete-the-group": "Are you sure you want to delete <b>{groupName}<b/>?",
-    "cannot-delete-default-group": "Cannot delete default group",
-    "cannot-delete-group-with-users": "Cannot delete group with users",
+    "are-you-sure-you-want-to-delete-the-group": "<b>{groupName}<b/> を削除しますか？",
+    "cannot-delete-default-group": "デフォルトのルグループは削除できません",
+    "cannot-delete-group-with-users": "ユーザがあるグループを削除できません",
     "confirm-group-deletion": "Confirm Group Deletion",
     "create-group": "Create Group",
     "error-updating-group": "Error updating group",
@@ -237,7 +237,7 @@
     "allow-users-outside-of-your-group-to-see-your-recipes-description": "When enabled you can use a public share link to share specific recipes without authorizing the user. When disabled, you can only share recipes with users who are in your group or with a pre-generated private link",
     "show-nutrition-information": "Show nutrition information",
     "show-nutrition-information-description": "When enabled the nutrition information will be shown on the recipe if available. If there is no nutrition information available, the nutrition information will not be shown",
-    "show-recipe-assets": "Show recipe assets",
+    "show-recipe-assets": "レシピアセットを表示",
     "show-recipe-assets-description": "When enabled the recipe assets will be shown on the recipe if available",
     "default-to-landscape-view": "Default to landscape view",
     "default-to-landscape-view-description": "When enabled the recipe header section will be shown in landscape view",
@@ -263,16 +263,16 @@
     "end-date": "End Date",
     "group": "Group (Beta)",
     "main": "主菜",
-    "meal-planner": "　献立表",
+    "meal-planner": "献立表",
     "meal-plans": "献立",
     "mealplan-categories": "MEALPLAN CATEGORIES",
-    "mealplan-created": "Mealplan created",
-    "mealplan-creation-failed": "Mealplan creation failed",
-    "mealplan-deleted": "Mealplan Deleted",
-    "mealplan-deletion-failed": "Mealplan deletion failed",
+    "mealplan-created": "献立に作成しました",
+    "mealplan-creation-failed": "献立の作成に失敗しました",
+    "mealplan-deleted": "献立を削除しました",
+    "mealplan-deletion-failed": "献立の削除に失敗しました",
     "mealplan-settings": "献立設定",
-    "mealplan-update-failed": "Mealplan update failed",
-    "mealplan-updated": "Mealplan Updated",
+    "mealplan-update-failed": "献立の更新に失敗しました",
+    "mealplan-updated": "献立を更新しました",
     "no-meal-plan-defined-yet": "No meal plan defined yet",
     "no-meal-planned-for-today": "No meal planned for today",
     "only-recipes-with-these-categories-will-be-used-in-meal-plans": "Only recipes with these categories will be used in Meal Plans",