diff --git a/src/main/resources/assets/gcyr/lang/ja_jp.json b/src/main/resources/assets/gcyr/lang/ja_jp.json
index 944bdf0e..42ce2dcc 100644
--- a/src/main/resources/assets/gcyr/lang/ja_jp.json
+++ b/src/main/resources/assets/gcyr/lang/ja_jp.json
@@ -22,6 +22,7 @@
   "block.gcyr.mercury_rock": "水星の岩",
   "block.gcyr.moon_sand": "月の砂",
   "block.gcyr.moon_stone": "月の石",
+  "block.gcyr.prb_underground_mushroom": "地下マッシュルーム",
   "block.gcyr.rocket_scanner": "ロケットスキャナー",
   "block.gcyr.seat": "座席",
   "block.gcyr.space_elevator": "軌道エレベータ",
@@ -63,12 +64,11 @@
   "item.gcyr.space_helmet": "宇宙服のヘルメット",
   "item.gcyr.space_leggings": "宇宙服のレギンス",
   "item.gcyr.space_station_package": "宇宙ステーションパッケージ",
-  "itemGroup.gcyr.gcyr": "Gcyr",
   "key.categories.gcyr": "Gregicality Rocketry",
   "key.startRocket": "スタートロケットエンティティ",
   "material.gcyr.aminophenol": "アミノフェノール",
   "material.gcyr.bis_trichloromethyl_benzene": "ヘキサクロロキシレン",
-  "material.gcyr.bisalloy_400": "Bisalloy-400",
+  "material.gcyr.bisalloy_400": "バイサロイ-400(Bisalloy-400)",
   "material.gcyr.chromic_acid": "クロム酸",
   "material.gcyr.co_mn_br_catalyst": "Co-Mn-Br 触媒",
   "material.gcyr.cobalt_bromide": "臭化コバルト",