diff --git a/packages/backend/src/server/web/boot.js b/packages/backend/src/server/web/boot.js
index fd7f54da54..825f02e835 100644
--- a/packages/backend/src/server/web/boot.js
+++ b/packages/backend/src/server/web/boot.js
@@ -160,37 +160,41 @@
 				<path d="M12 9v2m0 4v.01"></path>
 				<path d="M5 19h14a2 2 0 0 0 1.84 -2.75l-7.1 -12.25a2 2 0 0 0 -3.5 0l-7.1 12.25a2 2 0 0 0 1.75 2.75"></path>
 			</svg>
-			<h1>An error has occurred!</h1>
-			<button class="button-big" onclick="location.reload();">
-				<span class="button-label-big">Refresh</span>
+			<h1>Failed to load<br>読み込みに失敗しました</h1>
+			<button class="button-big" onclick="location.reload(true);">
+				<span class="button-label-big">Reload / リロード</span>
 			</button>
-			<p class="dont-worry">Don't worry, it's (probably) not your fault.</p>
-			<p>If the problem persists after refreshing, please contact your instance's administrator.<br>You may also try the following options:</p>
-			<p>Update your os and browser.</p>
-			<p>Disable an adblocker.</p>
-			<a href="/flush">
-				<button class="button-small">
-					<span class="button-label-small">Clear preferences and cache</span>
-				</button>
-			</a>
-			<br>
-			<a href="/cli">
-				<button class="button-small">
-					<span class="button-label-small">Start the simple client</span>
-				</button>
-			</a>
-			<br>
-			<a href="/bios">
-				<button class="button-small">
-					<span class="button-label-small">Start the repair tool</span>
-				</button>
-			</a>
+			<p><b>The following actions may solve the problem. / 以下を行うと解決する可能性があります。</b></p>
+			<p>Clear the browser cache / ブラウザのキャッシュをクリアする</p>
+			<p>Update your os and browser / ブラウザおよびOSを最新バージョンに更新する</p>
+			<p>Disable an adblocker / アドブロッカーを無効にする</p>
+			<details style="color: #86b300;">
+				<summary>Other options / その他のオプション</summary>
+				<a href="/flush">
+					<button class="button-small">
+						<span class="button-label-small">Clear preferences and cache</span>
+					</button>
+				</a>
+				<br>
+				<a href="/cli">
+					<button class="button-small">
+						<span class="button-label-small">Start the simple client</span>
+					</button>
+				</a>
+				<br>
+				<a href="/bios">
+					<button class="button-small">
+						<span class="button-label-small">Start the repair tool</span>
+					</button>
+				</a>
+			</details>
 			<br>
 			<div id="errors"></div>
 			`;
 			errorsElement = document.getElementById('errors');
 		}
 		const detailsElement = document.createElement('details');
+		detailsElement.id = 'errorInfo';
 		detailsElement.innerHTML = `
 		<br>
 		<summary>
@@ -247,7 +251,7 @@
 		.button-label-big {
 			color: #222;
 			font-weight: bold;
-			font-size: 20px;
+			font-size: 1.2em;
 			padding: 12px;
 		}
 
@@ -267,11 +271,6 @@
 			font-size: 16px;
 		}
 
-		.dont-worry,
-		#msg {
-			font-size: 18px;
-		}
-
 		.icon-warning {
 			color: #dec340;
 			height: 4rem;
@@ -279,14 +278,15 @@
 		}
 
 		h1 {
-			font-size: 32px;
+			font-size: 1.5em;
+			margin: 1em;
 		}
 
 		code {
 			font-family: Fira, FiraCode, monospace;
 		}
 
-		details {
+		#errorInfo {
 			background: #333;
 			margin-bottom: 2rem;
 			padding: 0.5rem 1rem;
@@ -296,16 +296,16 @@
 			margin: auto;
 		}
 
-		summary {
+		#errorInfo summary {
 			cursor: pointer;
 		}
 
-		summary > * {
+		#errorInfo summary > * {
 			display: inline;
 		}
 
 		@media screen and (max-width: 500px) {
-			details {
+			#errorInfo {
 				width: 50%;
 			}
 		`)