diff --git a/src/locales/ja/trainer-titles.json b/src/locales/ja/trainer-titles.json
index 9e26dfeeb6e..b3829c701e5 100644
--- a/src/locales/ja/trainer-titles.json
+++ b/src/locales/ja/trainer-titles.json
@@ -1 +1,38 @@
-{}
\ No newline at end of file
+{
+  "elite_four": "四天王",
+  "elite_four_female": "四天王",
+  "gym_leader": "ジムリーダー",
+  "gym_leader_female": "ジムリーダー",
+  "gym_leader_double": "ジムリーダーコンビ",
+  "champion": "チャンピオン",
+  "champion_female": "チャンピオン",
+  "champion_double": "チャンピオンコンビ",
+  "rival": "ライバル",
+  "professor": "ポケモン博士",
+  "frontier_brain": "フロンティアブレーン",
+  "rocket_boss": "ロケット団ボス",
+  "magma_boss": "マグマ団リーダー",
+  "aqua_boss": "アクア団リーダー",
+  "galactic_boss": "ギンガ団ボス",
+  "plasma_boss": "プラズマ団ボス",
+  "flare_boss": "フレア団ボス",
+  "aether_boss": "エーテル代表",
+  "skull_boss": "スカル団ボス",
+  "macro_boss": "マクロコスモス社長",
+
+  "rocket_admin": "ロケット団幹部",
+  "rocket_admin_female": "ロケット団幹部",
+  "magma_admin": "マグマ団幹部",
+  "magma_admin_female": "マグマロケット団幹部",
+  "aqua_admin": "アクア団幹部",
+  "aqua_admin_female": "アクア団幹部",
+  "galactic_commander": "ギンガ団幹部",
+  "galactic_commander_female": "ギンガ団幹部",
+  "plasma_sage": "プラズマ団賢人",
+  "plasma_admin": "プラズマ団賢人",
+  "flare_admin": "フレア団幹部",
+  "flare_admin_female": "フレア団幹部",
+  "aether_admin": "エーテル支部長",
+  "skull_admin": "スカル団幹部",
+  "macro_admin": "マクロコスモス"
+}