diff --git a/database-seeds/collections/charts-iidx.json b/database-seeds/collections/charts-iidx.json
index a90a44371..d7a1cb268 100644
--- a/database-seeds/collections/charts-iidx.json
+++ b/database-seeds/collections/charts-iidx.json
@@ -462481,7 +462481,18 @@
 		"playtype": "SP",
 		"rgcID": null,
 		"songID": 708,
-		"tierlistInfo": {},
+		"tierlistInfo": {
+			"kt-HC": {
+				"individualDifference": false,
+				"text": "12A+",
+				"value": 13
+			},
+			"kt-NC": {
+				"individualDifference": false,
+				"text": "12A+",
+				"value": 13
+			}
+		},
 		"versions": [
 			"27-omni",
 			"26-omni",
@@ -528362,7 +528373,18 @@
 		"playtype": "DP",
 		"rgcID": null,
 		"songID": 801,
-		"tierlistInfo": {},
+		"tierlistInfo": {
+			"kt-HC": {
+				"individualDifference": true,
+				"text": "12B",
+				"value": 12.6
+			},
+			"kt-NC": {
+				"individualDifference": true,
+				"text": "12B",
+				"value": 12.6
+			}
+		},
 		"versions": [
 			"27-omni",
 			"26-omni",
@@ -1016608,7 +1016630,18 @@
 		"playtype": "SP",
 		"rgcID": null,
 		"songID": 1565,
-		"tierlistInfo": {},
+		"tierlistInfo": {
+			"kt-HC": {
+				"individualDifference": true,
+				"text": "12S+",
+				"value": 13.2
+			},
+			"kt-NC": {
+				"individualDifference": true,
+				"text": "12S+",
+				"value": 13.2
+			}
+		},
 		"versions": [
 			"28",
 			"28-omni",
@@ -1295492,7 +1295525,18 @@
 		"playtype": "SP",
 		"rgcID": null,
 		"songID": 2003,
-		"tierlistInfo": {},
+		"tierlistInfo": {
+			"kt-HC": {
+				"individualDifference": false,
+				"text": "12A+",
+				"value": 13
+			},
+			"kt-NC": {
+				"individualDifference": false,
+				"text": "12A",
+				"value": 12.9
+			}
+		},
 		"versions": [
 			"28",
 			"28-omni",
@@ -1297890,7 +1297934,18 @@
 		"playtype": "SP",
 		"rgcID": null,
 		"songID": 2007,
-		"tierlistInfo": {},
+		"tierlistInfo": {
+			"kt-HC": {
+				"individualDifference": false,
+				"text": "12E",
+				"value": 12
+			},
+			"kt-NC": {
+				"individualDifference": false,
+				"text": "12E",
+				"value": 12
+			}
+		},
 		"versions": [
 			"28",
 			"28-omni",
@@ -1298484,7 +1298539,18 @@
 		"playtype": "SP",
 		"rgcID": null,
 		"songID": 2008,
-		"tierlistInfo": {},
+		"tierlistInfo": {
+			"kt-HC": {
+				"individualDifference": false,
+				"text": "12A",
+				"value": 12.8
+			},
+			"kt-NC": {
+				"individualDifference": false,
+				"text": "12A",
+				"value": 12.8
+			}
+		},
 		"versions": [
 			"28",
 			"28-omni",
@@ -1309786,7 +1309852,18 @@
 		"playtype": "SP",
 		"rgcID": null,
 		"songID": 2027,
-		"tierlistInfo": {},
+		"tierlistInfo": {
+			"kt-HC": {
+				"individualDifference": false,
+				"text": "12S",
+				"value": 13.1
+			},
+			"kt-NC": {
+				"individualDifference": false,
+				"text": "12A+",
+				"value": 13
+			}
+		},
 		"versions": [
 			"28",
 			"28-omni",
@@ -1313372,7 +1313449,18 @@
 		"playtype": "SP",
 		"rgcID": null,
 		"songID": 2033,
-		"tierlistInfo": {},
+		"tierlistInfo": {
+			"kt-HC": {
+				"individualDifference": true,
+				"text": "12S",
+				"value": 13.1
+			},
+			"kt-NC": {
+				"individualDifference": true,
+				"text": "12A+",
+				"value": 13
+			}
+		},
 		"versions": [
 			"28",
 			"28-omni",
@@ -1317564,7 +1317652,18 @@
 		"playtype": "SP",
 		"rgcID": null,
 		"songID": 2041,
-		"tierlistInfo": {},
+		"tierlistInfo": {
+			"kt-HC": {
+				"individualDifference": false,
+				"text": "12B",
+				"value": 12.6
+			},
+			"kt-NC": {
+				"individualDifference": false,
+				"text": "12B+",
+				"value": 12.8
+			}
+		},
 		"versions": [
 			"28",
 			"28-omni",