diff --git a/Dotnet/LogWatcher.cs b/Dotnet/LogWatcher.cs
index 5934ea7f..ad94e0af 100644
--- a/Dotnet/LogWatcher.cs
+++ b/Dotnet/LogWatcher.cs
@@ -455,6 +455,8 @@ namespace VRCX
             // 2021.12.12 11:47:22 Log        -  [Behaviour] OnPlayerJoined:Unnamed
             // 2021.12.12 11:53:14 Log        -  [Behaviour] OnPlayerLeftRoom
 
+            // Future logs will be formatted like this: [Behaviour] OnPlayerJoined Natsumi-sama (usr_032383a7-748c-4fb2-94e4-bcb928e5de6b)
+
             if (line.Contains("[Behaviour] OnPlayerJoined") && !line.Contains("] OnPlayerJoined:"))
             {
                 var lineOffset = line.LastIndexOf("] OnPlayerJoined");
@@ -464,14 +466,15 @@ namespace VRCX
                 if (lineOffset > line.Length)
                     return true;
 
-                var userDisplayName = line.Substring(lineOffset);
+                var userInfo = ParseUserInfo(line.Substring(lineOffset));
 
                 AppendLog(new[]
                 {
                     fileInfo.Name,
                     ConvertLogTimeToISO8601(line),
                     "player-joined",
-                    userDisplayName
+                    userInfo.DisplayName,
+                    userInfo.UserId
                 });
 
                 return true;
@@ -486,14 +489,15 @@ namespace VRCX
                 if (lineOffset > line.Length)
                     return true;
 
-                var userDisplayName = line.Substring(lineOffset);
+                var userInfo = ParseUserInfo(line.Substring(lineOffset));
 
                 AppendLog(new[]
                 {
                     fileInfo.Name,
                     ConvertLogTimeToISO8601(line),
                     "player-left",
-                    userDisplayName
+                    userInfo.DisplayName,
+                    userInfo.UserId
                 });
 
                 return true;
@@ -1285,6 +1289,26 @@ namespace VRCX
             return new string[][] { };
         }
 
+        private static (string DisplayName, string UserId) ParseUserInfo(string userInfo)
+        {
+            string userDisplayName;
+            string userId;
+
+            int pos = userInfo.LastIndexOf(" (");
+            if (pos >= 0)
+            {
+                userDisplayName = userInfo.Substring(0, pos);
+                userId = userInfo.Substring(pos + 2, userInfo.LastIndexOf(')') - (pos + 3));
+            }
+            else
+            {
+                userDisplayName = userInfo;
+                userId = null;
+            }
+
+            return (userDisplayName, userId);
+        }
+
         private class LogContext
         {
             public bool AudioDeviceChanged;
diff --git a/html/src/app.js b/html/src/app.js
index 71844dd9..4a919854 100644
--- a/html/src/app.js
+++ b/html/src/app.js
@@ -11245,7 +11245,7 @@ speechSynthesis.getVoices();
                 var joinTime = Date.parse(gameLog.dt);
                 var userMap = {
                     displayName: gameLog.displayName,
-                    userId,
+                    userId : gameLog.userId,
                     joinTime,
                     lastAvatar: ''
                 };
diff --git a/html/src/service/gamelog.js b/html/src/service/gamelog.js
index ea964525..66f15753 100644
--- a/html/src/service/gamelog.js
+++ b/html/src/service/gamelog.js
@@ -19,10 +19,12 @@ class GameLogService {
 
             case 'player-joined':
                 gameLog.displayName = args[0];
+                gameLog.userId = args[1];
                 break;
 
             case 'player-left':
                 gameLog.displayName = args[0];
+                gameLog.userId = args[1];
                 break;
 
             case 'notification':