diff --git a/server/src/score-import/framework/calculated-data/calculated-data.test.ts b/server/src/score-import/framework/calculated-data/calculated-data.test.ts
index cfe482643..2101f57a1 100644
--- a/server/src/score-import/framework/calculated-data/calculated-data.test.ts
+++ b/server/src/score-import/framework/calculated-data/calculated-data.test.ts
@@ -17,7 +17,7 @@ import { GetDefaultTierlist } from "../../../core/tierlist-core";
 const mockLogger = CreateLogCtx("calculated-data.test.ts");
 
 t.test("#CreateCalculatedData", async (t) => {
-    let res = await CreateCalculatedData(TestingIIDXSPDryScore, Testing511SPA, mockLogger);
+    let res = await CreateCalculatedData(TestingIIDXSPDryScore, Testing511SPA, 30, mockLogger);
 
     prAssert(
         res,
@@ -36,6 +36,7 @@ t.test("#CreateCalculatedData", async (t) => {
     let gitadoraRes = await CreateCalculatedData(
         TestingGITADORADoraDryScore,
         TestingDoraChart,
+        30,
         mockLogger
     );
 
diff --git a/server/src/score-import/framework/calculated-data/calculated-data.ts b/server/src/score-import/framework/calculated-data/calculated-data.ts
index 65d2680b1..003c02a8f 100644
--- a/server/src/score-import/framework/calculated-data/calculated-data.ts
+++ b/server/src/score-import/framework/calculated-data/calculated-data.ts
@@ -12,6 +12,7 @@ import { CalculateCHUNITHMRating, CalculateGITADORARating } from "./game-specifi
 export async function CreateCalculatedData(
     dryScore: DryScore,
     chart: AnyChartDocument,
+    esd: number | null,
     logger: KtLogger
 ): Promise<ScoreDocument["calculatedData"]> {
     const game = dryScore.game;
@@ -23,7 +24,7 @@ export async function CreateCalculatedData(
     const [rating, lampRating, gameSpecific] = await Promise.all([
         CalculateRating(dryScore, game, playtype, chart, logger, defaultTierlistID),
         CalculateLampRating(dryScore, game, playtype, chart, defaultTierlistID),
-        CreateGameSpecific(game, playtype, chart, dryScore, logger),
+        CreateGameSpecific(game, playtype, chart, dryScore, esd, logger),
     ]);
 
     return {
diff --git a/server/src/score-import/framework/calculated-data/game-specific.test.ts b/server/src/score-import/framework/calculated-data/game-specific.test.ts
index f31e4331b..c71e9572f 100644
--- a/server/src/score-import/framework/calculated-data/game-specific.test.ts
+++ b/server/src/score-import/framework/calculated-data/game-specific.test.ts
@@ -21,6 +21,7 @@ t.test("#CreateGameSpecific", (t) => {
             "SP",
             Testing511SPA,
             TestingIIDXSPDryScore,
+            30,
             logger
         );
 
@@ -43,6 +44,7 @@ t.test("#CreateGameSpecific", (t) => {
             "DP",
             Testing511SPA,
             TestingIIDXSPDryScore, // fake! this is an SP score. but we're testing
+            30,
             logger
         );
 
@@ -64,6 +66,7 @@ t.test("#CreateGameSpecific", (t) => {
             "Single",
             Testing511SPA,
             TestingSDVXSingleDryScore,
+            null,
             logger
         );
 
@@ -85,6 +88,7 @@ t.test("#CreateGameSpecific", (t) => {
             "SP",
             Testing511SPA,
             TestingIIDXSPDryScore, // fake! this is an iidx score. but we're testing
+            null,
             logger
         );
 
@@ -105,6 +109,7 @@ t.test("#CreateGameSpecific", (t) => {
             "DP",
             Testing511SPA,
             TestingIIDXSPDryScore, // fake! this is an iidx score. but we're testing
+            null,
             logger
         );
 
diff --git a/server/src/score-import/framework/calculated-data/game-specific.ts b/server/src/score-import/framework/calculated-data/game-specific.ts
index ddd6c6a64..2bdc49eaa 100644
--- a/server/src/score-import/framework/calculated-data/game-specific.ts
+++ b/server/src/score-import/framework/calculated-data/game-specific.ts
@@ -16,6 +16,9 @@ export async function CreateGameSpecific<G extends Game>(
     playtype: Playtypes[G],
     chart: AnyChartDocument,
     dryScore: DryScore,
+    // ESD gets specially passed through because it's not part of the DryScore, but
+    // can be used for statistics anyway.
+    esd: number | null,
     logger: KtLogger
 ): Promise<Record<string, number | null>> {
     let gameSpecific: Record<string, number | null> = {};
@@ -34,10 +37,7 @@ export async function CreateGameSpecific<G extends Game>(
                 BPIData.coef
             );
 
-            gameSpecific.KESDC =
-                dryScore.scoreData.esd === null
-                    ? null
-                    : CalculateKESDC(BPIData.kesd, dryScore.scoreData.esd);
+            gameSpecific.KESDC = esd === null ? null : CalculateKESDC(BPIData.kesd, esd);
         } else {
             gameSpecific.BPI = null;
             gameSpecific.KESDC = null;
diff --git a/server/src/score-import/framework/score-importing/hydrate-score.ts b/server/src/score-import/framework/score-importing/hydrate-score.ts
index e0bd6bfea..6c95e9fc1 100644
--- a/server/src/score-import/framework/score-importing/hydrate-score.ts
+++ b/server/src/score-import/framework/score-importing/hydrate-score.ts
@@ -22,7 +22,9 @@ export async function HydrateScore(
     scoreID: string,
     logger: KtLogger
 ): Promise<ScoreDocument> {
-    const calculatedData = await CreateCalculatedData(dryScore, chart, logger); // @todo
+    const esd = CalculateESDForGame(dryScore.game, dryScore.scoreData.percent / 100);
+
+    const calculatedData = await CreateCalculatedData(dryScore, chart, esd, logger); // @todo
 
     const { scoreData: dryScoreData, ...rest } = dryScore;
 
@@ -32,7 +34,7 @@ export async function HydrateScore(
             // @todo lamps may need to be separate upon game:playtype someday. Maybe. We need to check this out
             lampIndex: config.lamps[dryScore.game].indexOf(dryScore.scoreData.lamp as string),
             gradeIndex: config.grades[dryScore.game].indexOf(dryScore.scoreData.grade as string),
-            esd: CalculateESDForGame(dryScore.game, dryScore.scoreData.percent),
+            esd,
         },
         dryScoreData
     );
diff --git a/server/src/score-import/import-types/file/csv_eamusement-iidx/converter.test.ts b/server/src/score-import/import-types/file/csv_eamusement-iidx/converter.test.ts
index 755cd2d2e..bd3b67dc9 100644
--- a/server/src/score-import/import-types/file/csv_eamusement-iidx/converter.test.ts
+++ b/server/src/score-import/import-types/file/csv_eamusement-iidx/converter.test.ts
@@ -28,7 +28,6 @@ const DryScorePrudence = {
         grade: p.equalTo("F"),
         lamp: p.equalTo("HARD CLEAR"),
         score: p.equalTo(192),
-        esd: p.equalTo(162.5),
         percent: p.aprx(12.21),
         hitData: {
             pgreat: p.equalTo(75),
@@ -167,7 +166,6 @@ t.test("#EamScoreConverter", async (t) => {
                     scoreData: {
                         score: p.equalTo(1),
                         percent: p.aprx(0.063),
-                        esd: p.equalTo(200),
                         hitData: {
                             pgreat: p.equalTo(0),
                             great: p.equalTo(1),
diff --git a/server/src/test-utils/test-data/kamaitachi/iidx-dryscore.json b/server/src/test-utils/test-data/kamaitachi/iidx-dryscore.json
index b5f060be4..301f58b1b 100644
--- a/server/src/test-utils/test-data/kamaitachi/iidx-dryscore.json
+++ b/server/src/test-utils/test-data/kamaitachi/iidx-dryscore.json
@@ -6,7 +6,6 @@
         "lamp": "CLEAR",
         "percent": 50,
         "grade": "C",
-        "esd": 30,
         "hitData": {
             "pgreat": 50,
             "great": 10