diff --git a/MonitorControl.xcodeproj/project.pbxproj b/MonitorControl.xcodeproj/project.pbxproj
index 4c6b3b0..6583f34 100644
--- a/MonitorControl.xcodeproj/project.pbxproj
+++ b/MonitorControl.xcodeproj/project.pbxproj
@@ -110,6 +110,9 @@
 		28D1DE0F227FD006004CB494 /* MediaKeyTap.framework.dSYM */ = {isa = PBXFileReference; lastKnownFileType = wrapper.dsym; name = MediaKeyTap.framework.dSYM; path = Carthage/Build/Mac/MediaKeyTap.framework.dSYM; sourceTree = "<group>"; };
 		28D1DE10227FD006004CB494 /* AMCoreAudio.framework.dSYM */ = {isa = PBXFileReference; lastKnownFileType = wrapper.dsym; name = AMCoreAudio.framework.dSYM; path = Carthage/Build/Mac/AMCoreAudio.framework.dSYM; sourceTree = "<group>"; };
 		28D1DE11227FD006004CB494 /* DDC.framework.dSYM */ = {isa = PBXFileReference; lastKnownFileType = wrapper.dsym; name = DDC.framework.dSYM; path = Carthage/Build/Mac/DDC.framework.dSYM; sourceTree = "<group>"; };
+		3CCA5F952442EFF800B4DB84 /* ja */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = ja; path = ja.lproj/Main.strings; sourceTree = "<group>"; };
+		3CCA5F962442EFF800B4DB84 /* ja */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = ja; path = ja.lproj/MainMenu.strings; sourceTree = "<group>"; };
+		3CCA5F972442EFF800B4DB84 /* ja */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = ja; path = ja.lproj/Localizable.strings; sourceTree = "<group>"; };
 		47A9F59F22ACAFBE00F649BB /* zh-Hans */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = "zh-Hans"; path = "zh-Hans.lproj/Main.strings"; sourceTree = "<group>"; };
 		47A9F5A022ACAFBE00F649BB /* zh-Hans */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = "zh-Hans"; path = "zh-Hans.lproj/MainMenu.strings"; sourceTree = "<group>"; };
 		47A9F5A122ACAFBE00F649BB /* zh-Hans */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = "zh-Hans"; path = "zh-Hans.lproj/Localizable.strings"; sourceTree = "<group>"; };
@@ -405,6 +408,7 @@
 				"zh-Hans",
 				ru,
 				it,
+				ja,
 			);
 			mainGroup = 56754EA21D9A4016007BCDC5;
 			productRefGroup = 56754EAC1D9A4016007BCDC5 /* Products */;
@@ -563,6 +567,7 @@
 				47A9F5A122ACAFBE00F649BB /* zh-Hans */,
 				B0C4810623357CE500053F91 /* ru */,
 				6CAD135023624CC1009BD53F /* it */,
+				3CCA5F972442EFF800B4DB84 /* ja */,
 			);
 			name = Localizable.strings;
 			sourceTree = "<group>";
@@ -578,6 +583,7 @@
 				47A9F59F22ACAFBE00F649BB /* zh-Hans */,
 				B0C4810723357CE500053F91 /* ru */,
 				6CAD134E23624CC1009BD53F /* it */,
+				3CCA5F952442EFF800B4DB84 /* ja */,
 			);
 			name = Main.storyboard;
 			sourceTree = "<group>";
@@ -593,6 +599,7 @@
 				47A9F5A022ACAFBE00F649BB /* zh-Hans */,
 				B0C4810823357CE500053F91 /* ru */,
 				6CAD134F23624CC1009BD53F /* it */,
+				3CCA5F962442EFF800B4DB84 /* ja */,
 			);
 			name = MainMenu.xib;
 			sourceTree = "<group>";
diff --git a/MonitorControl/Support/ja.lproj/Localizable.strings b/MonitorControl/Support/ja.lproj/Localizable.strings
new file mode 100644
index 0000000..4feee1e
--- /dev/null
+++ b/MonitorControl/Support/ja.lproj/Localizable.strings
@@ -0,0 +1,53 @@
+
+/* Sown in menu */
+"Brightness" = "画面輝度";
+
+/* Build */
+"Build" = "ビルド";
+
+/* Shown in menu */
+"Contrast" = "コントラスト";
+
+/* Shown in menu */
+"Default" = "デフォルト";
+
+/* No comment provided by engineer. */
+"Display" = "ディスプレイ";
+
+/* Shown in the main prefs window */
+"General" = "一般";
+
+/* Shown in the main prefs window */
+"Keys" = "キー";
+
+/* Shown in the main prefs window  */
+"Advanced" = "詳細設定";
+
+/* Shown in menu */
+"No supported display found" = "サポートされていないディスプレイが検知されました";
+
+/* Shown in the alert dialog */
+"Ok" = "OK";
+
+/* Shown in Preferences window */
+"Preferences" = "環境設定";
+
+/* Shown in menu */
+"Set as default" = "デフォルトとして設定";
+
+/* Shown in the alert dialog */
+"Shortcuts not available" = "ショートカットキーを使用できません";
+
+/* Unknown display name
+ Unknown model
+ Unknown vendor */
+"Unknown" = "不明";
+
+/* Version */
+"Version" = "バージョン";
+
+/* Shown in menu */
+"Volume" = "音量";
+
+/* Shown in the alert dialog */
+"You need to enable MonitorControl in System Preferences > Security and Privacy > Accessibility for the keyboard shortcuts to work" = "ショートカットキーを使用するには、 環境設定 > セキュリティとプライバシー > アクセリビリティ からMonitorControlを有効にしてください。";
diff --git a/MonitorControl/UI/ja.lproj/Main.strings b/MonitorControl/UI/ja.lproj/Main.strings
new file mode 100644
index 0000000..c220e28
--- /dev/null
+++ b/MonitorControl/UI/ja.lproj/Main.strings
@@ -0,0 +1,150 @@
+
+/* Class = "NSButtonCell"; title = "Change Brightness/Volume for all screens"; ObjectID = "0Z7-PQ-Bl8"; */
+"0Z7-PQ-Bl8.title" = "すべての画面の画面輝度と音量を変更する";
+
+/* Class = "NSTextFieldCell"; title = "Text Cell"; ObjectID = "2gr-xG-Byx"; */
+"2gr-xG-Byx.title" = "Text Cell";
+
+/* Class = "NSButtonCell"; title = "Reset Preferences"; ObjectID = "4Pj-3t-PJr"; */
+"4Pj-3t-PJr.title" = "初期設定に戻す";
+
+/* Class = "NSTextFieldCell"; title = "Table View Cell"; ObjectID = "4or-hS-WeW"; */
+"4or-hS-WeW.title" = "Table View Cell";
+
+/* Class = "NSTextFieldCell"; title = "Advanced"; ObjectID = "5wk-Dy-0fG"; */
+"5wk-Dy-0fG.title" = "詳細設定";
+
+/* Class = "NSTextFieldCell"; title = "Table View Cell"; ObjectID = "5xu-ja-W21"; */
+"5xu-ja-W21.title" = "Table View Cell";
+
+/* Class = "NSTableColumn"; headerCell.title = "Enabled"; ObjectID = "8U8-ec-Zbv"; */
+"8U8-ec-Zbv.headerCell.title" = "有効";
+
+/* Class = "NSTableColumn"; headerCell.title = "Name"; ObjectID = "CHc-s5-4MN"; */
+"CHc-s5-4MN.headerCell.title" = "名称";
+
+/* Class = "NSMenuItem"; title = "Custom"; ObjectID = "Cle-DD-vR7"; */
+"Cle-DD-vR7.title" = "カスタム";
+
+/* Class = "NSTextFieldCell"; title = "Table View Cell"; ObjectID = "DGv-iu-Jg1"; */
+"DGv-iu-Jg1.title" = "Table View Cell";
+
+/* Class = "NSTextFieldCell"; title = "Keys"; ObjectID = "Dcz-GG-1li"; */
+"Dcz-GG-1li.title" = "キー";
+
+/* Class = "NSTextFieldCell"; title = "General"; ObjectID = "ENU-js-huy"; */
+"ENU-js-huy.title" = "一般";
+
+/* Class = "NSMenuItem"; title = "Minimal"; ObjectID = "Eq3-z9-yIo"; */
+"Eq3-z9-yIo.title" = "低頻度";
+
+/* Class = "NSTextFieldCell"; title = "Table View Cell"; ObjectID = "Euj-aT-PWW"; */
+"Euj-aT-PWW.title" = "Table View Cell";
+
+/* Class = "NSTextFieldCell"; title = "Display"; ObjectID = "ExD-7P-6XI"; */
+"ExD-7P-6XI.title" = "ディスプレイ";
+
+/* Class = "NSMenuItem"; title = "None"; ObjectID = "FoA-yh-Yx3"; */
+"FoA-yh-Yx3.title" = "設定しない";
+
+/* Class = "NSTextFieldCell"; title = "Text Cell"; ObjectID = "H4a-c9-LcB"; */
+"H4a-c9-LcB.title" = "Text Cell";
+
+/* Class = "NSTableColumn"; headerCell.title = "ID"; ObjectID = "JKW-oY-bSb"; */
+"JKW-oY-bSb.headerCell.title" = "ID";
+
+/* Class = "NSTableColumn"; headerCell.title = "Vendor"; ObjectID = "LRJ-fb-Z9E"; */
+"LRJ-fb-Z9E.headerCell.title" = "ベンダー";
+
+/* Class = "NSTextFieldCell"; title = "Table View Cell"; ObjectID = "LZ8-Tj-mCs"; */
+"LZ8-Tj-mCs.title" = "Table View Cell";
+
+/* Class = "NSTableColumn"; headerCell.title = "Hide OSD"; ObjectID = "MPF-Mr-zVU"; */
+"MPF-Mr-zVU.headerCell.title" = "OSDを隠す";
+
+/* Class = "NSMenuItem"; title = "Volume only"; ObjectID = "NLP-dU-Dam"; */
+"NLP-dU-Dam.title" = "音量のみ";
+
+/* Class = "NSTableColumn"; headerCell.title = "Model"; ObjectID = "Nvp-hI-w4x"; */
+"Nvp-hI-w4x.headerCell.title" = "モデル";
+
+/* Class = "NSTextFieldCell"; title = "Text Cell"; ObjectID = "PZ9-0Z-K6J"; */
+"PZ9-0Z-K6J.title" = "Text Cell";
+
+/* Class = "NSTextFieldCell"; title = "Table View Cell"; ObjectID = "Pkk-Ce-Y6Q"; */
+"Pkk-Ce-Y6Q.title" = "Table View Cell";
+
+/* Class = "NSMenuItem"; title = "Normal"; ObjectID = "Riq-uM-bTs"; */
+"Riq-uM-bTs.title" = "普通";
+
+/* Class = "NSTextFieldCell"; title = "Text Cell"; ObjectID = "UBV-gO-AZz"; */
+"UBV-gO-AZz.title" = "Text Cell";
+
+/* Class = "NSTextFieldCell"; title = "Text Cell"; ObjectID = "VPD-MR-IXg"; */
+"VPD-MR-IXg.title" = "Text Cell";
+
+/* Class = "NSTextFieldCell"; title = "Listen for"; ObjectID = "Vh8-06-U3K"; */
+"Vh8-06-U3K.title" = "操作対象:";
+
+/* Class = "NSMenuItem"; title = "Both Brightness & Volume"; ObjectID = "Vr4-xb-B4o"; */
+"Vr4-xb-B4o.title" = "画面輝度と音量";
+
+/* Class = "NSTextFieldCell"; title = "Table View Cell"; ObjectID = "aSw-3H-uNa"; */
+"aSw-3H-uNa.title" = "Table View Cell";
+
+/* Class = "NSTextFieldCell"; title = "Text Cell"; ObjectID = "afl-95-ZJl"; */
+"afl-95-ZJl.title" = "Text Cell";
+
+/* Class = "NSTextFieldCell"; title = "Text Cell"; ObjectID = "as0-t3-Aub"; */
+"as0-t3-Aub.title" = "Text Cell";
+
+/* Class = "NSTextFieldCell"; title = "Table View Cell"; ObjectID = "cnb-Li-1lE"; */
+"cnb-Li-1lE.title" = "Table View Cell";
+
+/* Class = "NSTableColumn"; headerCell.title = "Display Name"; ObjectID = "dNl-I0-hcg"; */
+"dNl-I0-hcg.headerCell.title" = "ディスプレイの名称";
+
+/* Class = "NSTableColumn"; headerCell.title = "ID"; ObjectID = "dgp-q7-cBK"; */
+"dgp-q7-cBK.headerCell.title" = "ID";
+
+/* Class = "NSButtonCell"; title = "Lower Contrast after Brightness"; ObjectID = "fhy-Er-0aI"; */
+"fhy-Er-0aI.title" = "画面輝度変更後、コントラストを下げる";
+
+/* Class = "NSTextFieldCell"; title = "Warning ⚠️\nChanging some of these setting may cause system freezes or unexpected behaviour. "; ObjectID = "frw-j2-tE1"; */
+"frw-j2-tE1.title" = "⚠️ 注意 ⚠️\n下の設定を変更するとMacがフリーズしたり予期せぬ挙動になる場合があります。";
+
+/* Class = "NSTableColumn"; headerCell.title = "Longer Delay"; ObjectID = "grO-Kr-l4d"; */
+"grO-Kr-l4d.headerCell.title" = "遅延を長くする";
+
+/* Class = "NSTableColumn"; headerCell.title = "Polling Mode"; ObjectID = "gxn-NH-Qhb"; */
+"gxn-NH-Qhb.headerCell.title" = "ポーリングモード";
+
+/* Class = "NSMenuItem"; title = "Brightness only"; ObjectID = "hjz-0c-rvK"; */
+"hjz-0c-rvK.title" = "画面輝度のみ";
+
+/* Class = "NSButtonCell"; title = "Start MonitorControl at Login"; ObjectID = "j72-NF-zsW"; */
+"j72-NF-zsW.title" = "ログイン時にMonitorCoontrolを起動する";
+
+/* Class = "NSButton"; ibShadowedToolTip = "More Info"; ObjectID = "kqn-gU-mZX"; */
+"kqn-gU-mZX.ibShadowedToolTip" = "More Info";
+
+/* Class = "NSTextFieldCell"; title = "Version 0.0.0 (Build 0)"; ObjectID = "mBs-6m-13Q"; */
+"mBs-6m-13Q.title" = "バージョン 0.0.0 (ビルド 0)";
+
+/* Class = "NSTableColumn"; headerCell.title = "Friendly Name"; ObjectID = "uoI-1J-RdD"; */
+"uoI-1J-RdD.headerCell.title" = "表示名 (クリックして変更)";
+
+/* Class = "NSMenuItem"; title = "Heavy"; ObjectID = "vik-vN-bJe"; */
+"vik-vN-bJe.title" = "高頻度";
+
+/* Class = "NSTextFieldCell"; title = "Text Cell"; ObjectID = "vkG-RF-Yne"; */
+"vkG-RF-Yne.title" = "Text Cell";
+
+/* Class = "NSTableColumn"; headerCell.title = "DDC"; ObjectID = "xFw-if-3FU"; */
+"xFw-if-3FU.headerCell.title" = "DDC";
+
+/* Class = "NSButtonCell"; title = "Show a slider for contrast"; ObjectID = "xSI-8W-Xd0"; */
+"xSI-8W-Xd0.title" = "コントラスト変更用のスライダーをメニューに表示する";
+
+/* Class = "NSTableColumn"; headerCell.title = "Polling Count"; ObjectID = "ytT-up-Dhs"; */
+"ytT-up-Dhs.headerCell.title" = "ポーリングカウント";
diff --git a/MonitorControl/UI/ja.lproj/MainMenu.strings b/MonitorControl/UI/ja.lproj/MainMenu.strings
new file mode 100644
index 0000000..b43f3c2
--- /dev/null
+++ b/MonitorControl/UI/ja.lproj/MainMenu.strings
@@ -0,0 +1,6 @@
+
+/* Class = "NSMenuItem"; title = "Quit"; ObjectID = "JTa-2I-AsI"; */
+"JTa-2I-AsI.title" = "MonitorControl を終了";
+
+/* Class = "NSMenuItem"; title = "Preferences..."; ObjectID = "SOS-eZ-uU5"; */
+"SOS-eZ-uU5.title" = "環境設定...";
diff --git a/README.md b/README.md
index c304d39..a4c42f3 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ Control your external monitor brightness, contrast or volume directly from a men
 
 <!-- Language emoji -->
 <div align="center">
-    <p>Translations: :uk: :fr: :de: :it: :ru: 🇺🇦 </p>
+    <p>Translations: :uk: :fr: :de: :it: :ru: :ukraine: :jp:</p>
 </div>
 
 <br/>