diff --git a/packages/client/src/components/global/MkTime.vue b/packages/client/src/components/global/MkTime.vue
index 5d9295433f..72a51f10d6 100644
--- a/packages/client/src/components/global/MkTime.vue
+++ b/packages/client/src/components/global/MkTime.vue
@@ -1,21 +1,23 @@
 <template>
 	<time :title="absolute">
-		<template v-if="mode === 'relative'">{{ relative }}</template>
+		<template v-if="invalid">{{ i18n.ts._ago.invalid }}</template>
+		<template v-else-if="mode === 'relative'">{{ relative }}</template>
 		<template v-else-if="mode === 'absolute'">{{ absolute }}</template>
 		<template v-else-if="mode === 'detail'"
 			>{{ absolute }} ({{ relative }})</template
 		>
-		<slot></slot>
 	</time>
 </template>
 
 <script lang="ts" setup>
-import { onUnmounted } from "vue";
+import { onMounted, onUnmounted } from "vue";
 import { i18n } from "@/i18n";
+import { dateTimeFormat } from "@/scripts/intl-const";
 
 const props = withDefaults(
 	defineProps<{
-		time: Date | string;
+		time: Date | string | number | null;
+		origin?: Date | null;
 		mode?: "relative" | "absolute" | "detail";
 	}>(),
 	{
@@ -24,12 +26,23 @@ const props = withDefaults(
 );
 
 const _time =
-	typeof props.time === "string" ? new Date(props.time) : props.time;
-const absolute = _time.toLocaleString();
+	props.time == null
+		? NaN
+		: typeof props.time === "number"
+		? props.time
+		: (props.time instanceof Date
+				? props.time
+				: new Date(props.time)
+		  ).getTime();
+const invalid = Number.isNaN(_time);
+const absolute = !invalid ? dateTimeFormat.format(_time) : i18n.ts._ago.invalid;
 
-let now = $shallowRef(new Date());
-const relative = $computed(() => {
-	const ago = (now.getTime() - _time.getTime()) / 1000; /*ms*/
+let now = $ref((props.origin ?? new Date()).getTime());
+const relative = $computed<string>(() => {
+	if (props.mode === "absolute") return ""; // absoluteではrelativeを使わないので計算しない
+	if (invalid) return i18n.ts._ago.invalid;
+
+	const ago = (now - _time) / 1000; /*ms*/
 	return ago >= 31536000
 		? i18n.t("_ago.yearsAgo", { n: Math.round(ago / 31536000).toString() })
 		: ago >= 2592000
@@ -49,22 +62,36 @@ const relative = $computed(() => {
 		: i18n.ts._ago.future;
 });
 
-function tick() {
-	// TODO: パフォーマンス向上のため、このコンポーネントが画面内に表示されている場合のみ更新する
-	now = new Date();
-
-	tickId = window.setTimeout(() => {
-		window.requestAnimationFrame(tick);
-	}, 10000);
-}
-
 let tickId: number;
 
-if (props.mode === "relative" || props.mode === "detail") {
-	tickId = window.requestAnimationFrame(tick);
+function tick() {
+	const _now = new Date().getTime();
+	const agoPrev = (now - _time) / 1000; /*ms*/ // 現状のinterval
 
+	now = _now;
+
+	const ago = (now - _time) / 1000; /*ms*/ // 次のinterval
+	const prev = agoPrev < 60 ? 10000 : agoPrev < 3600 ? 60000 : 180000;
+	const next = ago < 60 ? 10000 : ago < 3600 ? 60000 : 180000;
+
+	if (!tickId) {
+		tickId = window.setInterval(tick, next);
+	} else if (prev < next) {
+		window.clearInterval(tickId);
+		tickId = window.setInterval(tick, next);
+	}
+}
+
+if (
+	!invalid &&
+	props.origin === null &&
+	(props.mode === "relative" || props.mode === "detail")
+) {
+	onMounted(() => {
+		tick();
+	});
 	onUnmounted(() => {
-		window.cancelAnimationFrame(tickId);
+		if (tickId) window.clearInterval(tickId);
 	});
 }
 </script>
diff --git a/packages/client/src/scripts/intl-const.ts b/packages/client/src/scripts/intl-const.ts
new file mode 100644
index 0000000000..ac73723717
--- /dev/null
+++ b/packages/client/src/scripts/intl-const.ts
@@ -0,0 +1,12 @@
+import { lang } from "@/config";
+
+export const versatileLang = (lang ?? "ja-JP").replace("ja-KS", "ja-JP");
+export const dateTimeFormat = new Intl.DateTimeFormat(versatileLang, {
+	year: "numeric",
+	month: "numeric",
+	day: "numeric",
+	hour: "numeric",
+	minute: "numeric",
+	second: "numeric",
+});
+export const numberFormat = new Intl.NumberFormat(versatileLang);