diff --git a/app/src/app/api/minio/route.ts b/app/src/app/api/minio/route.ts
index 573c84e..07ffd1e 100644
--- a/app/src/app/api/minio/route.ts
+++ b/app/src/app/api/minio/route.ts
@@ -111,7 +111,7 @@ export async function POST(req: NextRequest) {
 		userId: user?.id || 0,
 	};
 
-	const score = await scoreRegister(scoreData);
+	const score = await scoreRegister(scoreData, assignmentId);
 
 	const response: ScoreResponse = {
 		text: caption || "",
diff --git a/app/src/functions/scoreRegister.ts b/app/src/functions/scoreRegister.ts
index ab604a4..928fd29 100644
--- a/app/src/functions/scoreRegister.ts
+++ b/app/src/functions/scoreRegister.ts
@@ -1,8 +1,9 @@
 import { prisma } from "@/lib/prisma";
 import type { Score, ScoreData } from "@/types";
 
-const assignmentDate = async function GET() {
+const assignmentDate = async function GET(assignmentId: number) {
 	const assignment = await prisma.assignment.findFirst({
+		where: { id: assignmentId },
 		select: { date: true },
 	});
 	const date = assignment?.date ?? null;
@@ -13,7 +14,10 @@ const assignmentDate = async function GET() {
 	});
 };
 
-export const scoreRegister = async (scoreData: ScoreData) => {
+export const scoreRegister = async (
+	scoreData: ScoreData,
+	assignmentId: number,
+) => {
 	// 必須データの存在確認
 	if (
 		scoreData.similarity == null ||
@@ -22,23 +26,25 @@ export const scoreRegister = async (scoreData: ScoreData) => {
 		scoreData.assignmentId == null ||
 		scoreData.userId == null
 	) {
-		return
+		return;
 	}
 
 	// ポイントの計算
 	const minTime = 60;
 	const maxTime = 3600;
 
-	const response = await assignmentDate();
+	const response = await assignmentDate(assignmentId);
 	const assignmentDateValue = await response.json();
 
 	const answerIntervalTime =
 		new Date(scoreData.answerTime).getTime() -
 		new Date(assignmentDateValue.date).getTime();
+
 	const normalizedTime = Math.max(
 		0,
 		Math.min(1, (answerIntervalTime / 1000 - minTime) / (maxTime - minTime)),
 	);
+
 	const point = scoreData.similarity * 70 + (1 - normalizedTime) * 30;
 
 	const score: Score = await prisma.score.create({