diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 27609ef527..3f70c8dbbf 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -423,6 +423,18 @@ hideThisNote: "このノートを非表示"
 showFeaturedNotesInTimeline: "タイムラインにおすすめのノートを表示する"
 objectStorage: "オブジェクトストレージ"
 useObjectStorage: "オブジェクトストレージを使用"
+objectStorageBaseUrl: "Base URL"
+objectStorageBaseUrlDesc: "参照に使用するURL。CDNやProxyを使用している場合はそのURL、S3: 'https://<bucket>.s3.amazonaws.com'、GCS等: 'https://storage.googleapis.com/<bucket>'。"
+objectStorageBucket: "Bucket"
+objectStorageBucketDesc: "使用サービスのbucket名を指定してください。"
+objectStoragePrefix: "Prefix"
+objectStoragePrefixDesc: "このprefixのディレクトリ下に格納されます。"
+objectStorageEndpoint: "Endpoint"
+objectStorageEndpointDesc: "S3の場合は空、それ以外の場合は各サービスのendpointを指定してください。'<host>'または'<host>:<port>'のように指定します。"
+objectStorageRegion: "Region"
+objectStorageRegionDesc: "'xx-east-1'のようなregionを指定してください。使用サービスにregionの概念がない場合は、空または'us-east-1'にしてください。"
+objectStorageUseSSL: "SSLを使用する"
+objectStorageUseSSLDesc: "API接続にhttpsを使用しない場合はオフにしてください"
 serverLogs: "サーバーログ"
 deleteAll: "全て削除"
 showFixedPostForm: "タイムライン上部に投稿フォームを表示する"
diff --git a/src/client/pages/instance/settings.vue b/src/client/pages/instance/settings.vue
index 7572108718..d11f840d8f 100644
--- a/src/client/pages/instance/settings.vue
+++ b/src/client/pages/instance/settings.vue
@@ -102,21 +102,20 @@
 		<div class="_content">
 			<mk-switch v-model="useObjectStorage">{{ $t('useObjectStorage') }}</mk-switch>
 			<template v-if="useObjectStorage">
-				<mk-input v-model="objectStorageBaseUrl" :disabled="!useObjectStorage">URL</mk-input>
+				<mk-input v-model="objectStorageBaseUrl" :disabled="!useObjectStorage">{{ $t('objectStorageBaseUrl') }}<template #desc>{{ $t('objectStorageBaseUrlDesc') }}</template></mk-input>
 				<div class="_inputs">
-					<mk-input v-model="objectStorageBucket" :disabled="!useObjectStorage">Bucket</mk-input>
-					<mk-input v-model="objectStoragePrefix" :disabled="!useObjectStorage">Prefix</mk-input>
+					<mk-input v-model="objectStorageBucket" :disabled="!useObjectStorage">{{ $t('objectStorageBucket') }}<template #desc>{{ $t('objectStorageBucketDesc') }}</template></mk-input>
+					<mk-input v-model="objectStoragePrefix" :disabled="!useObjectStorage">{{ $t('objectStoragePrefix') }}<template #desc>{{ $t('objectStoragePrefixDesc') }}</template></mk-input>
 				</div>
-				<mk-input v-model="objectStorageEndpoint" :disabled="!useObjectStorage">Endpoint</mk-input>
+				<mk-input v-model="objectStorageEndpoint" :disabled="!useObjectStorage">{{ $t('objectStorageEndpoint') }}<template #desc>{{ $t('objectStorageEndpointDesc') }}</template></mk-input>
 				<div class="_inputs">
-					<mk-input v-model="objectStorageRegion" :disabled="!useObjectStorage">Region</mk-input>
-					<mk-input v-model="objectStoragePort" type="number" :disabled="!useObjectStorage">Port</mk-input>
+					<mk-input v-model="objectStorageRegion" :disabled="!useObjectStorage">{{ $t('objectStorageRegion') }}<template #desc>{{ $t('objectStorageRegionDesc') }}</template></mk-input>
 				</div>
 				<div class="_inputs">
 					<mk-input v-model="objectStorageAccessKey" :disabled="!useObjectStorage"><template #icon><fa :icon="faKey"/></template>Access key</mk-input>
 					<mk-input v-model="objectStorageSecretKey" :disabled="!useObjectStorage"><template #icon><fa :icon="faKey"/></template>Secret key</mk-input>
 				</div>
-				<mk-switch v-model="objectStorageUseSSL" :disabled="!useObjectStorage">SSL</mk-switch>
+				<mk-switch v-model="objectStorageUseSSL" :disabled="!useObjectStorage">{{ $t('objectStorageUseSSL') }}<template #desc>{{ $t('objectStorageUseSSLDesc') }}</template></mk-switch>
 			</template>
 		</div>
 		<div class="_footer">
diff --git a/src/remote/activitypub/request.ts b/src/remote/activitypub/request.ts
index dc777a3c5d..0f87381a44 100644
--- a/src/remote/activitypub/request.ts
+++ b/src/remote/activitypub/request.ts
@@ -7,10 +7,10 @@ import config from '../../config';
 import { ILocalUser } from '../../models/entities/user';
 import { UserKeypairs } from '../../models';
 import { ensure } from '../../prelude/ensure';
-import * as httpsProxyAgent from 'https-proxy-agent';
+import { HttpsProxyAgent } from 'https-proxy-agent';
 
 const agent = config.proxy
-	? new httpsProxyAgent(config.proxy)
+	? new HttpsProxyAgent(config.proxy)
 	: new https.Agent({
 			lookup: cache.lookup,
 		});
diff --git a/src/services/drive/add-file.ts b/src/services/drive/add-file.ts
index 2931de6dc0..cf0951ebad 100644
--- a/src/services/drive/add-file.ts
+++ b/src/services/drive/add-file.ts
@@ -217,7 +217,8 @@ async function upload(key: string, stream: fs.ReadStream | Buffer, type: string,
 
 	const upload = s3.upload(params);
 
-	await upload.promise();
+	const result = await upload.promise();
+	if (result) logger.debug(`Uploaded: ${result.Bucket}/${result.Key} => ${result.Location}`);
 }
 
 async function deleteOldFile(user: IRemoteUser) {
diff --git a/src/services/drive/s3.ts b/src/services/drive/s3.ts
index 95243d5901..d136bb2694 100644
--- a/src/services/drive/s3.ts
+++ b/src/services/drive/s3.ts
@@ -1,23 +1,23 @@
 import * as S3 from 'aws-sdk/clients/s3';
 import config from '../../config';
 import { Meta } from '../../models/entities/meta';
-import * as httpsProxyAgent from 'https-proxy-agent';
+import { HttpsProxyAgent } from 'https-proxy-agent';
 import * as agentkeepalive from 'agentkeepalive';
 
 const httpsAgent = config.proxy
-	? new httpsProxyAgent(config.proxy)
+	? new HttpsProxyAgent(config.proxy)
 	: new agentkeepalive.HttpsAgent({
 			freeSocketTimeout: 30 * 1000
 		});
 
 export function getS3(meta: Meta) {
 	const conf = {
-		endpoint: meta.objectStorageEndpoint,
+		endpoint: meta.objectStorageEndpoint || undefined,
 		accessKeyId: meta.objectStorageAccessKey,
 		secretAccessKey: meta.objectStorageSecretKey,
-		region: meta.objectStorageRegion,
+		region: meta.objectStorageRegion || undefined,
 		sslEnabled: meta.objectStorageUseSSL,
-		s3ForcePathStyle: true,
+		s3ForcePathStyle: !!meta.objectStorageEndpoint,
 		httpOptions: {
 		}
 	} as S3.ClientConfiguration;