diff --git a/packages/backend/src/config.ts b/packages/backend/src/config.ts
index f20093e802..9753b3c6b0 100644
--- a/packages/backend/src/config.ts
+++ b/packages/backend/src/config.ts
@@ -46,6 +46,7 @@ type Source = {
 		pass: string;
 	}[];
 	redis: RedisOptionsSource;
+	redisForDatabaseCache?: RedisOptionsSource;
 	redisForPubsub?: RedisOptionsSource;
 	redisForJobQueue?: RedisOptionsSource;
 	redisForSystemQueue?: RedisOptionsSource;
@@ -176,6 +177,7 @@ export type Config = {
 	externalMediaProxyEnabled: boolean;
 	videoThumbnailGenerator: string | null;
 	redis: RedisOptions & RedisOptionsSource;
+	redisForDatabaseCache: RedisOptions & RedisOptionsSource;
 	redisForPubsub: RedisOptions & RedisOptionsSource;
 	redisForSystemQueue: RedisOptions & RedisOptionsSource;
 	redisForEndedPollNotificationQueue: RedisOptions & RedisOptionsSource;
@@ -251,6 +253,7 @@ export function loadConfig(): Config {
 		dbSlaves: config.dbSlaves,
 		meilisearch: config.meilisearch,
 		redis,
+		redisForDatabaseCache: config.redisForDatabaseCache ? convertRedisOptions(config.redisForDatabaseCache, host) : redis,
 		redisForPubsub: config.redisForPubsub ? convertRedisOptions(config.redisForPubsub, host) : redis,
 		redisForSystemQueue: config.redisForSystemQueue ? convertRedisOptions(config.redisForSystemQueue, host) : redisForJobQueue,
 		redisForEndedPollNotificationQueue: config.redisForEndedPollNotificationQueue ? convertRedisOptions(config.redisForEndedPollNotificationQueue, host) : redisForJobQueue,
diff --git a/packages/backend/src/postgres.ts b/packages/backend/src/postgres.ts
index a60875cbaa..fa5ce55da3 100644
--- a/packages/backend/src/postgres.ts
+++ b/packages/backend/src/postgres.ts
@@ -230,12 +230,8 @@ export function createPostgresDataSource(config: Config) {
 		cache: !config.db.disableCache && process.env.NODE_ENV !== 'test' ? { // dbをcloseしても何故かredisのコネクションが内部的に残り続けるようで、テストの際に支障が出るため無効にする(キャッシュも含めてテストしたいため本当は有効にしたいが...)
 			type: 'ioredis',
 			options: {
-				host: config.redis.host,
-				port: config.redis.port,
-				family: config.redis.family ?? 0,
-				password: config.redis.pass,
-				keyPrefix: `${config.redis.prefix}:query:`,
-				db: config.redis.db ?? 0,
+				...config.redisForDatabaseCache,
+				keyPrefix: `${config.redisForDatabaseCache.prefix}:query:`,
 			},
 		} : false,
 		logging: log,