diff --git a/packages/frontend/.storybook/generate.tsx b/packages/frontend/.storybook/generate.tsx
index dd40bac2cc..3e9c048fae 100644
--- a/packages/frontend/.storybook/generate.tsx
+++ b/packages/frontend/.storybook/generate.tsx
@@ -397,6 +397,8 @@ function toStories(component: string): string {
 // glob('src/{components,pages,ui,widgets}/**/*.vue')
 Promise.all([
 	glob('src/components/global/*.vue'),
+	glob('src/components/MkAnalogClock.vue'),
+	glob('src/components/MkDigitalClock.vue'),
 	glob('src/components/MkGalleryPostPreview.vue'),
 	glob('src/pages/user/home.vue'),
 ])
diff --git a/packages/frontend/src/components/MkAnalogClock.stories.impl.ts b/packages/frontend/src/components/MkAnalogClock.stories.impl.ts
index 05190aa268..7552db90d9 100644
--- a/packages/frontend/src/components/MkAnalogClock.stories.impl.ts
+++ b/packages/frontend/src/components/MkAnalogClock.stories.impl.ts
@@ -1,5 +1,6 @@
 /* eslint-disable @typescript-eslint/explicit-function-return-type */
 import { StoryObj } from '@storybook/vue3';
+import isChromatic from 'chromatic';
 import MkAnalogClock from './MkAnalogClock.vue';
 export const Default = {
 	render(args) {
@@ -22,6 +23,14 @@ export const Default = {
 			template: '<MkAnalogClock v-bind="props" />',
 		};
 	},
+	args: {
+		now: isChromatic() ? () => new Date('2023-01-01T10:10:30') : undefined,
+	},
+	decorators: [
+		() => ({
+			template: '<div style="container-type:inline-size;height:100%"><div style="height:100cqmin;margin:auto;width:100cqmin"><story/></div></div>',
+		}),
+	],
 	parameters: {
 		layout: 'fullscreen',
 	},
diff --git a/packages/frontend/src/components/MkAnalogClock.vue b/packages/frontend/src/components/MkAnalogClock.vue
index 1218202616..7a5b4bec08 100644
--- a/packages/frontend/src/components/MkAnalogClock.vue
+++ b/packages/frontend/src/components/MkAnalogClock.vue
@@ -39,6 +39,7 @@
 	-->
 
 	<line
+		ref="sLine"
 		:class="[$style.s, { [$style.animate]: !disableSAnimate && sAnimation !== 'none', [$style.elastic]: sAnimation === 'elastic', [$style.easeOut]: sAnimation === 'easeOut' }]"
 		:x1="5 - (0 * (sHandLengthRatio * handsTailLength))"
 		:y1="5 + (1 * (sHandLengthRatio * handsTailLength))"
@@ -73,9 +74,10 @@
 </template>
 
 <script lang="ts" setup>
-import { computed, onMounted, onBeforeUnmount } from 'vue';
+import { computed, onMounted, onBeforeUnmount, ref } from 'vue';
 import tinycolor from 'tinycolor2';
 import { globalEvents } from '@/events.js';
+import { defaultIdleRender } from '@/scripts/idle-render.js';
 
 // https://stackoverflow.com/questions/1878907/how-can-i-find-the-difference-between-two-angles
 const angleDiff = (a: number, b: number) => {
@@ -99,6 +101,7 @@ const props = withDefaults(defineProps<{
 	graduations?: 'none' | 'dots' | 'numbers';
 	fadeGraduations?: boolean;
 	sAnimation?: 'none' | 'elastic' | 'easeOut';
+	now?: () => Date;
 }>(), {
 	numbers: false,
 	thickness: 0.1,
@@ -107,6 +110,7 @@ const props = withDefaults(defineProps<{
 	graduations: 'dots',
 	fadeGraduations: true,
 	sAnimation: 'elastic',
+	now: () => new Date(),
 });
 
 const graduationsMajor = computed(() => {
@@ -143,26 +147,37 @@ let mAngle = $ref<number>(0);
 let sAngle = $ref<number>(0);
 let disableSAnimate = $ref(false);
 let sOneRound = false;
+const sLine = ref<SVGPathElement>();
 
 function tick() {
-	const now = new Date();
-	now.setMinutes(now.getMinutes() + (new Date().getTimezoneOffset() + props.offset));
+	const now = props.now();
+	now.setMinutes(now.getMinutes() + now.getTimezoneOffset() + props.offset);
+	const previousS = s;
+	const previousM = m;
+	const previousH = h;
 	s = now.getSeconds();
 	m = now.getMinutes();
 	h = now.getHours();
+	if (previousS === s && previousM === m && previousH === h) {
+		return;
+	}
 	hAngle = Math.PI * (h % (props.twentyfour ? 24 : 12) + (m + s / 60) / 60) / (props.twentyfour ? 12 : 6);
 	mAngle = Math.PI * (m + s / 60) / 30;
-	if (sOneRound) { // 秒針が一周した際のアニメーションをよしなに処理する(これが無いと秒が59->0になったときに期待したアニメーションにならない)
+	if (sOneRound && sLine.value) { // 秒針が一周した際のアニメーションをよしなに処理する(これが無いと秒が59->0になったときに期待したアニメーションにならない)
 		sAngle = Math.PI * 60 / 30;
-		window.setTimeout(() => {
+		defaultIdleRender.delete(tick);
+		sLine.value.addEventListener('transitionend', () => {
 			disableSAnimate = true;
-			window.setTimeout(() => {
+			requestAnimationFrame(() => {
 				sAngle = 0;
-				window.setTimeout(() => {
+				requestAnimationFrame(() => {
 					disableSAnimate = false;
-				}, 100);
-			}, 100);
-		}, 700);
+					if (enabled) {
+						defaultIdleRender.add(tick);
+					}
+				});
+			});
+		}, { once: true });
 	} else {
 		sAngle = Math.PI * s / 30;
 	}
@@ -186,20 +201,13 @@ function calcColors() {
 calcColors();
 
 onMounted(() => {
-	const update = () => {
-		if (enabled) {
-			tick();
-			window.setTimeout(update, 1000);
-		}
-	};
-	update();
-
+	defaultIdleRender.add(tick);
 	globalEvents.on('themeChanged', calcColors);
 });
 
 onBeforeUnmount(() => {
 	enabled = false;
-
+	defaultIdleRender.delete(tick);
 	globalEvents.off('themeChanged', calcColors);
 });
 </script>
diff --git a/packages/frontend/src/components/MkDigitalClock.vue b/packages/frontend/src/components/MkDigitalClock.vue
index 278dc8a5e7..f5b717c442 100644
--- a/packages/frontend/src/components/MkDigitalClock.vue
+++ b/packages/frontend/src/components/MkDigitalClock.vue
@@ -11,7 +11,8 @@
 </template>
 
 <script lang="ts" setup>
-import { onUnmounted, ref, watch } from 'vue';
+import { onMounted, onUnmounted, ref, watch } from 'vue';
+import { defaultIdleRender } from '@/scripts/idle-render.js';
 
 const props = withDefaults(defineProps<{
 	showS?: boolean;
@@ -23,7 +24,6 @@ const props = withDefaults(defineProps<{
 	offset: 0 - new Date().getTimezoneOffset(),
 });
 
-let intervalId;
 const hh = ref('');
 const mm = ref('');
 const ss = ref('');
@@ -52,13 +52,12 @@ const tick = () => {
 
 tick();
 
-watch(() => props.showMs, () => {
-	if (intervalId) window.clearInterval(intervalId);
-	intervalId = window.setInterval(tick, props.showMs ? 10 : 1000);
-}, { immediate: true });
+onMounted(() => {
+	defaultIdleRender.add(tick);
+});
 
 onUnmounted(() => {
-	window.clearInterval(intervalId);
+	defaultIdleRender.remove(tick);
 });
 </script>
 
diff --git a/packages/frontend/src/components/global/MkTime.vue b/packages/frontend/src/components/global/MkTime.vue
index 99169512db..b1fad81aba 100644
--- a/packages/frontend/src/components/global/MkTime.vue
+++ b/packages/frontend/src/components/global/MkTime.vue
@@ -11,6 +11,7 @@
 import { onUnmounted } from 'vue';
 import { i18n } from '@/i18n';
 import { dateTimeFormat } from '@/scripts/intl-const';
+import { defaultIdleRender } from '@/scripts/idle-render.js';
 
 const props = withDefaults(defineProps<{
 	time: Date | string | number | null;
@@ -45,21 +46,16 @@ const relative = $computed<string>(() => {
 		i18n.ts._ago.future);
 });
 
-let tickId: number;
-
-function tick() {
+function tick(): void {
 	now = props.origin ?? (new Date()).getTime();
-	const ago = (now - _time) / 1000/*ms*/;
-	const next = ago < 60 ? 10000 : ago < 3600 ? 60000 : 180000;
-
-	tickId = window.setTimeout(tick, next);
 }
 
 if (props.mode === 'relative' || props.mode === 'detail') {
 	tick();
+	defaultIdleRender.add(tick);
 
 	onUnmounted(() => {
-		window.clearTimeout(tickId);
+		defaultIdleRender.delete(tick);
 	});
 }
 </script>
diff --git a/packages/frontend/src/scripts/idle-render.ts b/packages/frontend/src/scripts/idle-render.ts
new file mode 100644
index 0000000000..09a14cc68c
--- /dev/null
+++ b/packages/frontend/src/scripts/idle-render.ts
@@ -0,0 +1,41 @@
+// eslint-disable-next-line import/no-default-export
+export default class IdleRender {
+	#renderers: Set<FrameRequestCallback>;
+	#budget: number;
+	#rafId: number;
+	#ricId: number;
+
+	constructor(budget = 0) {
+		this.#renderers = new Set();
+		this.#budget = budget;
+		this.#rafId = 0;
+		this.#ricId = requestIdleCallback((deadline) => this.#render(deadline));
+	}
+
+	#render(deadline: IdleDeadline): void {
+		if (deadline.timeRemaining() > this.#budget) {
+			this.#rafId = requestAnimationFrame((time) => {
+				for (const renderer of this.#renderers) {
+					renderer(time);
+				}
+			});
+		}
+		this.#ricId = requestIdleCallback((arg) => this.#render(arg));
+	}
+
+	add(renderer: FrameRequestCallback): void {
+		this.#renderers.add(renderer);
+	}
+
+	delete(renderer: FrameRequestCallback): void {
+		this.#renderers.delete(renderer);
+	}
+
+	dispose(): void {
+		this.#renderers.clear();
+		cancelAnimationFrame(this.#rafId);
+		cancelIdleCallback(this.#ricId);
+	}
+}
+
+export const defaultIdleRender = new IdleRender();