diff --git a/lang/ja.json b/lang/ja.json
index 478c538..30c9061 100644
--- a/lang/ja.json
+++ b/lang/ja.json
@@ -1,92 +1,93 @@
 {
-    "category:administrative": "",
+    "category:administrative": "行政界",
     "category:agriculture": "農業",
     "category:alternative_amenities": "生活環境",
     "category:alternative_routes": "ルート",
-    "category:buildings": "",
-    "category:buildings-entrances": "",
+    "category:buildings": "建物",
+    "category:buildings-entrances": "エントランス",
     "category:buildings-figure-ground": "",
-    "category:buildings-height": "",
-    "category:buildings-start_date": "",
-    "category:buildings-type": "",
+    "category:buildings-height": "建物の高さ",
+    "category:buildings-start_date": "築年数",
+    "category:buildings-type": "建物の種類",
     "category:car_amenities": "生活環境",
     "category:car_furniture": "街路設置公共物",
-    "category:car_maxspeed": "",
-    "category:car_routes": "",
-    "category:children": "",
-    "category:coal": "",
+    "category:car_maxspeed": "最高速度",
+    "category:car_routes": "車のルート",
+    "category:children": "子ども用施設",
+    "category:coal": "石炭",
     "category:communication": "交流",
     "category:construction": "工事中",
-    "category:craft": "",
+    "category:craft": "職人",
     "category:culture": "文化",
     "category:culture_religion": "文化",
-    "category:cycle_amenities": "",
-    "category:cycle_routes": "",
+    "category:cycle_amenities": "アメニティ",
+    "category:cycle_routes": "自転車ルート",
     "category:education": "教育サービス",
     "category:electric_power": "電力",
     "category:emergency": "緊急サービス",
-    "category:energy": "",
+    "category:energy": "エネルギー",
     "category:financial": "金融",
     "category:gastro": "食べ物",
-    "category:gastro-smoking": "",
+    "category:gastro-smoking": "禁煙の飲食店",
     "category:health": "健康",
-    "category:hiking_routes": "",
-    "category:historic": "記念",
+    "category:hiking_routes": "ハイキングルート",
+    "category:historic": "歴史",
     "category:index": "",
-    "category:infrastructure": "",
+    "category:infrastructure": "インフラ",
     "category:internet": "インターネット接続",
-    "category:law": "",
+    "category:law": "法令",
     "category:leisure": "レジャー",
     "category:leisure_sport_shopping": "レジャー",
-    "category:memorial": "",
+    "category:memorial": "記念碑",
     "category:military": "軍事",
-    "category:mtb-routes": "",
+    "category:mtb-routes": "マウンテンバイクのルート",
     "category:natural": "自然地層",
-    "category:office": "",
-    "category:oil_gas": "",
-    "category:organisations": "",
+    "category:office": "オフィス",
+    "category:oil_gas": "石油と天然ガス",
+    "category:organisations": "組織",
     "category:other": "その他",
-    "category:outdoor": "",
+    "category:outdoor": "アウトドア活動",
     "category:phone": "電話",
     "category:places": "場所",
     "category:places_geo": "場所",
-    "category:playgrounds": "",
+    "category:playgrounds": "遊び場",
     "category:post": "郵便",
-    "category:power_routes": "",
-    "category:pt": "",
-    "category:pt:routes": "",
+    "category:power_routes": "電線のルート",
+    "category:pt": "公共交通地図",
+    "category:pt:routes": "ルート",
     "category:pt:stops": "停留所と駅",
     "category:pt_amenities": "生活環境",
     "category:public": "公共サービス",
     "category:railway": "鉄道",
-    "category:railway-electrification": "",
-    "category:railway-infrastructure": "",
-    "category:railway-maxspeed": "",
-    "category:railway-routes": "",
+    "category:railway-electrification": "鉄道の電力",
+    "category:railway-infrastructure": "鉄道インフラ",
+    "category:railway-maxspeed": "鉄道の最高速度",
+    "category:railway-routes": "鉄道ルート",
     "category:religion": "宗教",
     "category:renewables": "",
     "category:residential": "住居エリア",
     "category:resources": "",
     "category:services": "サービス",
     "category:shop": "ショッピング",
-    "category:special": "",
+    "category:special": "特別",
     "category:sport": "スポーツ",
-    "category:swimming_bathing": "",
+    "category:swimming_bathing": "水泳と入浴",
     "category:tourism_attractions": "観光",
     "category:tourism_services": "観光",
     "category:transport": "輸送",
     "category:transport_alternative": "その他交通 (サイクリング、ハイキング、...)",
     "category:transport_car": "個人輸送機関",
-    "category:transport_cycle": "",
+    "category:transport_cycle": "サイクリング",
     "category:transport_pt": "公共輸送",
-    "category:transport_walk": "",
-    "category:walk_amenities": "",
+    "category:transport_walk": "ウォーキング",
+    "category:walk_amenities": "アメニティ",
     "category:waste": "処理場",
     "category:water": "",
-    "category:wikipedia": "",
+    "category:wikipedia": "ウィキペディア",
     "category:works": "工場",
-    "category:xmas": "",
+    "category:xmas": "クリスマス",
     "date format not understood": "",
     "outdated feature": "",
-    "xmas:outdated-warning": ""
+    "xmas:outdated-warning": "今のシーズンは地物が更新されていません! チェックして現在の日付に'xmas:lastcheck' タグをセットしてください。",
+    "Objects with diet information": "食事制限情報のあるオブジェクト"
 }