diff --git a/src/locales/ja/battle-info.json b/src/locales/ja/battle-info.json
index 9e26dfeeb6e6..2959cdda3323 100644
--- a/src/locales/ja/battle-info.json
+++ b/src/locales/ja/battle-info.json
@@ -1 +1,3 @@
-{}
\ No newline at end of file
+{
+  "generation": "{{generation}}世代"
+}
diff --git a/src/locales/ja/game-stats-ui-handler.json b/src/locales/ja/game-stats-ui-handler.json
index 9e26dfeeb6e6..25bb21f701ab 100644
--- a/src/locales/ja/game-stats-ui-handler.json
+++ b/src/locales/ja/game-stats-ui-handler.json
@@ -1 +1,42 @@
-{}
\ No newline at end of file
+{
+  "stats": "統計",
+  "playTime": "プレー時間",
+  "totalBattles": "合計バトル数",
+  "starters": "スターター数",
+  "shinyStarters": "色違いスターター数",
+  "speciesSeen": "合計発見数",
+  "speciesCaught": "合計捕獲数",
+  "ribbonsOwned": "リボン数",
+  "classicRuns": "クラシックラン",
+  "classicWins": "クラシック勝利",
+  "dailyRunAttempts": "デイリーラン",
+  "dailyRunWins": "デイリーラン勝利",
+  "endlessRuns": "エンドレスラン",
+  "highestWaveEndless": "エンドレス最高ウェーブ",
+  "highestMoney": "最大貯金",
+  "highestDamage": "最大ダメージ",
+  "highestHPHealed": "最大HP回復",
+  "pokemonEncountered": "遭遇したポケモン",
+  "pokemonDefeated": "倒したポケモン",
+  "pokemonCaught": "捕まえたポケモン",
+  "eggsHatched": "ふかしたタマゴ",
+  "subLegendsSeen": "見つけた順伝説",
+  "subLegendsCaught": "捕まえた順伝説",
+  "subLegendsHatched": "ふかした順伝説",
+  "legendsSeen": "見つけた伝説",
+  "legendsCaught": "捕まえた伝説",
+  "legendsHatched": "ふかした伝説",
+  "mythicalsSeen": "見つけた幻ポケモン",
+  "mythicalsCaught": "捕まえた幻ポケモン",
+  "mythicalsHatched": "ふかした幻ポケモン",
+  "shiniesSeen": "見つけた色違い",
+  "shiniesCaught": "捕まえた色違い",
+  "shiniesHatched": "ふかした色違い",
+  "pokemonFused": "合体したポケモン",
+  "trainersDefeated": "倒したトレーナー",
+  "eggsPulled": "引いたタマゴ",
+  "rareEggsPulled": "引いたレアタマゴ",
+  "epicEggsPulled": "引いた超レアタマゴ",
+  "legendaryEggsPulled": "引いた伝説タマゴ",
+  "manaphyEggsPulled": "引いたマナフィタマゴ"
+}
\ No newline at end of file
diff --git a/src/locales/ja/menu-ui-handler.json b/src/locales/ja/menu-ui-handler.json
index e9bec2cf0ae4..257e0703c1bd 100644
--- a/src/locales/ja/menu-ui-handler.json
+++ b/src/locales/ja/menu-ui-handler.json
@@ -1,19 +1,27 @@
 {
-  "GAME_SETTINGS": "せってい",
-  "ACHIEVEMENTS": "じっせき",
-  "STATS": "とうけい",
-  "RUN_HISTORY":"ラン履歴",
+  "GAME_SETTINGS": "設定",
+  "ACHIEVEMENTS": "実績",
+  "STATS": "統計",
+  "VOUCHERS": "クーポン",
   "EGG_LIST": "タマゴリスト",
   "EGG_GACHA": "タマゴガチャ",
-  "MANAGE_DATA": "データかんり",
+  "MANAGE_DATA": "データ管理",
   "COMMUNITY": "コミュニティ",
+  "SAVE_AND_QUIT": "保存して終了",
   "LOG_OUT": "ログアウト",
   "slot": "スロット {{slotNumber}}",
   "importSession": "セッションのインポート",
+  "importSlotSelect": "インポート先の　スロットを　選んでください",
   "exportSession": "セッションのエクスポート",
-  "importRunHistory":"ラン履歴インポート",
-  "exportRunHistory":"ラン履歴エクスポート",
+  "exportSlotSelect": "エクスポート元の　スロットを　選んでください",
   "importData": "データのインポート",
   "exportData": "データのエクスポート",
-  "cancel": "キャンセル"
+  "consentPreferences": "同意設定",
+  "linkDiscord": "Discord連携",
+  "unlinkDiscord": "Discord連携解除",
+  "linkGoogle": "Google連携",
+  "unlinkGoogle": "Google連携解除",
+  "cancel": "キャンセル",
+  "losingProgressionWarning": "戦闘開始からの　データが　保存されません。\nよろしいですか？",
+  "noEggs": "現在　タマゴを　ふかしていません！"
 }
\ No newline at end of file
diff --git a/src/locales/ja/modifier-select-ui-handler.json b/src/locales/ja/modifier-select-ui-handler.json
index 9e26dfeeb6e6..9370f01491e3 100644
--- a/src/locales/ja/modifier-select-ui-handler.json
+++ b/src/locales/ja/modifier-select-ui-handler.json
@@ -1 +1,12 @@
-{}
\ No newline at end of file
+{
+  "transfer": "アイテム移行",
+  "reroll": "選択肢変更",
+  "lockRarities": "レア度の固定",
+  "checkTeam": "チームを確認",
+  "transferDesc": "ポケモンの　手持ちアイテムを　移行する",
+  "rerollDesc": "お金を　使って　アイテムの　選択肢を　変更する",
+  "lockRaritiesDesc": "選択肢を　変更するときの　レア度を　固定する\n（選択肢変更金額を影響する）",
+  "checkTeamDesc": "チームの　状態を　確認する\nフォルムチェンジアイテムを　有効・無効にする",
+  "rerollCost": "{{formattedMoney}}円",
+  "itemCost": "{{formattedMoney}}円"
+}
diff --git a/src/locales/ja/pokemon-form-battle.json b/src/locales/ja/pokemon-form-battle.json
index 9e26dfeeb6e6..adbc7b4b3da7 100644
--- a/src/locales/ja/pokemon-form-battle.json
+++ b/src/locales/ja/pokemon-form-battle.json
@@ -1 +1,14 @@
-{}
\ No newline at end of file
+{
+  "mega": "メガ{{pokemonName}}",
+  "mega-x": "メガ{{pokemonName}}X",
+  "mega-y": "メガ{{pokemonName}}Y",
+  "primal": "ゲンシ{{pokemonName}}",
+  "gigantamax": "キョダイ{{pokemonName}}",
+  "eternamax": "E・{{pokemonName}}",
+  "megaChange": "{{preName}}は\nメガ{{pokemonName}}に　メガシンカした！",
+  "gigantamaxChange": "{{preName}}は\nキョダイマックスした！",
+  "eternamaxChange": "{{preName}}は\nムゲンダイマックスした！",
+  "revertChange": "{{pokemonName}}は\n元の姿に　戻った！",
+  "formChange": "{{preName}}は\n姿を　変えた！",
+  "disguiseChange": "ばけのかわが　みがわりに　なった！"
+}
diff --git a/src/locales/ja/pokemon-form.json b/src/locales/ja/pokemon-form.json
index 9e26dfeeb6e6..761249044560 100644
--- a/src/locales/ja/pokemon-form.json
+++ b/src/locales/ja/pokemon-form.json
@@ -1 +1,170 @@
-{}
\ No newline at end of file
+{
+  "pikachuCosplay": "コスプレ",
+  "pikachuCoolCosplay": "クールなコスプレ",
+  "pikachuBeautyCosplay": "きれいなコスプレ",
+  "pikachuCuteCosplay": "かわいいコスプレ",
+  "pikachuSmartCosplay": "かしこいコスプレ",
+  "pikachuToughCosplay": "パワフルなコスプレ",
+  "pikachuPartner": "パートナー",
+  "eeveePartner": "パートナー",
+  "pichuSpiky": "ギザみみ",
+  "unownA": "A",
+  "unownB": "B",
+  "unownC": "C",
+  "unownD": "D",
+  "unownE": "E",
+  "unownF": "F",
+  "unownG": "G",
+  "unownH": "H",
+  "unownI": "I",
+  "unownJ": "J",
+  "unownK": "K",
+  "unownL": "L",
+  "unownM": "M",
+  "unownN": "N",
+  "unownO": "O",
+  "unownP": "P",
+  "unownQ": "Q",
+  "unownR": "R",
+  "unownS": "S",
+  "unownT": "T",
+  "unownU": "U",
+  "unownV": "V",
+  "unownW": "W",
+  "unownX": "X",
+  "unownY": "Y",
+  "unownZ": "Z",
+  "unownExclamation": "!",
+  "unownQuestion": "?",
+  "castformSunny": "たいよう",
+  "castformRainy": "あまみず",
+  "castformSnowy": "ゆきぐも",
+  "deoxysNormal": "ノーマル",
+  "burmyPlant": "くさき",
+  "burmySandy": "すなち",
+  "burmyTrash": "ゴミ",
+  "shellosEast": "ひがし",
+  "shellosWest": "にし",
+  "rotomHeat": "ヒート",
+  "rotomWash": "ウォッシュ",
+  "rotomFrost": "フロスト",
+  "rotomFan": "スピン",
+  "rotomMow": "カット",
+  "giratinaAltered": "アナザー",
+  "shayminLand": "ランド",
+  "basculinRedStriped": "赤筋",
+  "basculinBlueStriped": "青筋",
+  "basculinWhiteStriped": "白筋",
+  "deerlingSpring": "春",
+  "deerlingSummer": "夏",
+  "deerlingAutumn": "秋",
+  "deerlingWinter": "冬",
+  "tornadusIncarnate": "けしん",
+  "thundurusIncarnate": "けしん",
+  "landorusIncarnate": "けしん",
+  "keldeoOrdinary": "いつも",
+  "meloettaAria": "ボイス",
+  "meloettaPirouette": "ステップ",
+  "froakieBattleBond": "きずなへんげ",
+  "scatterbugMeadow": "はなぞの",
+  "scatterbugIcySnow": "ひょうせつ",
+  "scatterbugPolar": "ゆきぐに",
+  "scatterbugTundra": "せつげん",
+  "scatterbugContinental": "たいりく",
+  "scatterbugGarden": "ていえん",
+  "scatterbugElegant": "みやび",
+  "scatterbugModern": "モダン",
+  "scatterbugMarine": "マリン",
+  "scatterbugArchipelago": "ぐんとう",
+  "scatterbugHighPlains": "こうや",
+  "scatterbugSandstorm": "さじん",
+  "scatterbugRiver": "たいが",
+  "scatterbugMonsoon": "スコール",
+  "scatterbugSavanna": "サバンナ",
+  "scatterbugSun": "たいよう",
+  "scatterbugOcean": "オーシャン",
+  "scatterbugJungle": "ジャングル",
+  "scatterbugFancy": "ファンシー",
+  "scatterbugPokeBall": "ボール",
+  "flabebeRed": "赤",
+  "flabebeYellow": "黄",
+  "flabebeOrange": "オレンジ",
+  "flabebeBlue": "青",
+  "flabebeWhite": "白",
+  "furfrouHeart": "ハート",
+  "furfrouStar": "スター",
+  "furfrouDiamond": "ダイア",
+  "furfrouDebutante": "レディ",
+  "furfrouMatron": "マダム",
+  "furfrouDandy": "ジェントル",
+  "furfrouLaReine": "クイーン",
+  "furfrouKabuki": "カブキ",
+  "furfrouPharaoh": "キングダム",
+  "pumpkabooSmall": "ちいさい",
+  "pumpkabooLarge": "おおきい",
+  "pumpkabooSuper": "とくだい",
+  "xerneasNeutral": "リラックス",
+  "xerneasActive": "アクティブ",
+  "zygarde50": "50%フォルム",
+  "zygarde10": "10%フォルム",
+  "zygarde50Pc": "50%フォルム　スワームチェンジ",
+  "zygarde10Pc": "10%フォルム　スワームチェンジ",
+  "zygardeComplete": "パーフェクトフォルム",
+  "oricorioBaile": "めらめら",
+  "oricorioPompom": "ぱちぱち",
+  "oricorioPau": "ふらふら",
+  "oricorioSensu": "まいまい",
+  "rockruffOwnTempo": "マイペース",
+  "miniorRedMeteor": "赤　りゅうせい",
+  "miniorOrangeMeteor": "オレンジ　りゅうせい",
+  "miniorYellowMeteor": "黄　りゅうせい",
+  "miniorGreenMeteor": "緑　りゅうせい",
+  "miniorBlueMeteor": "水色　りゅうせい",
+  "miniorIndigoMeteor": "青 りゅうせい",
+  "miniorVioletMeteor": "紫 りゅうせい",
+  "miniorRed": "赤",
+  "miniorOrange": "オレンジ",
+  "miniorYellow": "黄",
+  "miniorGreen": "緑",
+  "miniorBlue": "水色",
+  "miniorIndigo": "青",
+  "miniorViolet": "紫",
+  "mimikyuDisguised": "ばけたすがた",
+  "mimikyuBusted": "ばれたすがた",
+  "magearnaOriginal": "500ねんまえ",
+  "marshadowZenith": "Zパワー",
+  "sinisteaPhony": "がんさく",
+  "sinisteaAntique": "しんさく",
+  "eiscueNoIce": "ナイスなし",
+  "indeedeeMale": "オス",
+  "indeedeeFemale": "メス",
+  "morpekoFullBelly": "まんぷく",
+  "zacianHeroOfManyBattles": "れきせんのゆうしゃ",
+  "zamazentaHeroOfManyBattles": "れきせんのゆうしゃ",
+  "zarudeDada": "とうちゃん",
+  "enamorusIncarnate": "けしん",
+  "squawkabillyGreenPlumage": "グリーンフェザー",
+  "squawkabillyBluePlumage": "ブルーフェザー",
+  "squawkabillyYellowPlumage": "イエローフェザー",
+  "squawkabillyWhitePlumage": "ホワイトフェザー",
+  "tatsugiriCurly": "そったすがた",
+  "tatsugiriDroopy": "たれたすがた",
+  "tatsugiriStretchy": "のびたすがた",
+  "gimmighoulChest": "はこ",
+  "gimmighoulRoaming": "とほ",
+  "koraidonApexBuild": "かんぜんけいたい",
+  "koraidonLimitedBuild":"せいげんけいたい",
+  "koraidonSprintingBuild":"しっそうけいたい",
+  "koraidonSwimmingBuild":"ゆうえいけいたい",
+  "koraidonGlidingBuild":"かっくうけいたい",
+  "miraidonUltimateMode":"コンプリートモード",
+  "miraidonLowPowerMode":"リミテッドモード",
+  "miraidonDriveMode":"ドライブモード",
+  "miraidonAquaticMode":"フロートモード",
+  "miraidonGlideMode":"グライドモード",
+  "poltchageistCounterfeit": "マガイモノ",
+  "poltchageistArtisan": "タカイモノ",
+  "paldeaTaurosCombat": "コンバット",
+  "paldeaTaurosBlaze": "ブレイズ",
+  "paldeaTaurosAqua": "ウォーター"
+}
\ No newline at end of file