diff --git a/packages/client/src/components/chart-tooltip.vue b/packages/client/src/components/chart-tooltip.vue
new file mode 100644
index 0000000000..b080eaf2b4
--- /dev/null
+++ b/packages/client/src/components/chart-tooltip.vue
@@ -0,0 +1,51 @@
+<template>
+<MkTooltip ref="tooltip" :showing="showing" :x="x" :y="y" :max-width="340" @closed="emit('closed')">
+	<div v-if="title" class="qpcyisrl">
+		<div class="title">{{ title }}</div>
+		<div v-for="x in series" class="series">
+			<span class="color" :style="{ background: x.backgroundColor, borderColor: x.borderColor }"></span>
+			<span>{{ x.text }}</span>
+		</div>
+	</div>
+</MkTooltip>
+</template>
+
+<script lang="ts" setup>
+import {  } from 'vue';
+import MkTooltip from './ui/tooltip.vue';
+
+const props = defineProps<{
+	showing: boolean;
+	x: number;
+	y: number;
+	title: string;
+	series: {
+		backgroundColor: string;
+		borderColor: string;
+		text: string;
+	}[];
+}>();
+
+const emit = defineEmits<{
+	(ev: 'closed'): void;
+}>();
+</script>
+
+<style lang="scss" scoped>
+.qpcyisrl {
+	> .title {
+		margin-bottom: 4px;
+	}
+
+	> .series {
+		> .color {
+			display: inline-block;
+			width: 8px;
+			height: 8px;
+			border-width: 1px;
+			border-style: solid;
+			margin-right: 8px;
+		}
+	}
+}
+</style>
diff --git a/packages/client/src/components/chart.vue b/packages/client/src/components/chart.vue
index d17c0c9f3e..3e46c51b47 100644
--- a/packages/client/src/components/chart.vue
+++ b/packages/client/src/components/chart.vue
@@ -8,7 +8,7 @@
 </template>
 
 <script lang="ts">
-import { defineComponent, onMounted, ref, watch, PropType } from 'vue';
+import { defineComponent, onMounted, ref, watch, PropType, onUnmounted, shallowRef } from 'vue';
 import {
 	Chart,
 	ArcElement,
@@ -31,6 +31,7 @@ import { enUS } from 'date-fns/locale';
 import zoomPlugin from 'chartjs-plugin-zoom';
 import * as os from '@/os';
 import { defaultStore } from '@/store';
+import MkChartTooltip from '@/components/chart-tooltip.vue';
 
 Chart.register(
 	ArcElement,
@@ -137,6 +138,43 @@ export default defineComponent({
 			}));
 		};
 
+		const tooltipShowing = ref(false);
+		const tooltipX = ref(0);
+		const tooltipY = ref(0);
+		const tooltipTitle = ref(null);
+		const tooltipSeries = ref(null);
+		let disposeTooltipComponent;
+
+		os.popup(MkChartTooltip, {
+			showing: tooltipShowing,
+			x: tooltipX,
+			y: tooltipY,
+			title: tooltipTitle,
+			series: tooltipSeries,
+		}, {}).then(({ dispose }) => {
+			disposeTooltipComponent = dispose;
+		});
+
+		function externalTooltipHandler(context) {
+			if (context.tooltip.opacity === 0) {
+				tooltipShowing.value = false;
+				return;
+			}
+
+			tooltipTitle.value = context.tooltip.title[0];
+			tooltipSeries.value = context.tooltip.body.map((b, i) => ({
+				backgroundColor: context.tooltip.labelColors[i].backgroundColor,
+				borderColor: context.tooltip.labelColors[i].borderColor,
+				text: b.lines[0],
+			}));
+
+			const rect = context.chart.canvas.getBoundingClientRect();
+
+			tooltipShowing.value = true;
+			tooltipX.value = rect.left + window.pageXOffset + context.tooltip.caretX;
+			tooltipY.value = rect.top + window.pageYOffset + context.tooltip.caretY;
+		}
+
 		const render = () => {
 			if (chartInstance) {
 				chartInstance.destroy();
@@ -222,10 +260,12 @@ export default defineComponent({
 							},
 						},
 						tooltip: {
+							enabled: false,
 							mode: 'index',
 							animation: {
 								duration: 0,
 							},
+							external: externalTooltipHandler,
 						},
 						zoom: {
 							pan: {
@@ -684,6 +724,10 @@ export default defineComponent({
 			fetchAndRender();
 		});
 
+		onUnmounted(() => {
+			if (disposeTooltipComponent) disposeTooltipComponent();
+		});
+
 		return {
 			chartEl,
 			fetching,
diff --git a/packages/client/src/components/form/range.vue b/packages/client/src/components/form/range.vue
index 3e02cacb9b..a82348d317 100644
--- a/packages/client/src/components/form/range.vue
+++ b/packages/client/src/components/form/range.vue
@@ -117,7 +117,7 @@ export default defineComponent({
 				text: computed(() => {
 					return props.textConverter(finalValue.value);
 				}),
-				source: thumbEl,
+				targetElement: thumbEl,
 			}, {}, 'closed');
 
 			const style = document.createElement('style');
diff --git a/packages/client/src/components/notification.vue b/packages/client/src/components/notification.vue
index 5659c899be..d855f81f8a 100644
--- a/packages/client/src/components/notification.vue
+++ b/packages/client/src/components/notification.vue
@@ -153,7 +153,7 @@ export default defineComponent({
 				showing,
 				reaction: props.notification.reaction ? props.notification.reaction.replace(/^:(\w+):$/, ':$1@.:') : props.notification.reaction,
 				emojis: props.notification.note.emojis,
-				source: reactionRef.value.$el,
+				targetElement: reactionRef.value.$el,
 			}, {}, 'closed');
 		});
 
diff --git a/packages/client/src/components/reaction-tooltip.vue b/packages/client/src/components/reaction-tooltip.vue
index 1b2a024e21..b53061df48 100644
--- a/packages/client/src/components/reaction-tooltip.vue
+++ b/packages/client/src/components/reaction-tooltip.vue
@@ -1,5 +1,5 @@
 <template>
-<MkTooltip ref="tooltip" :source="source" :max-width="340" @closed="emit('closed')">
+<MkTooltip ref="tooltip" :target-element="targetElement" :max-width="340" @closed="emit('closed')">
 	<div class="beeadbfb">
 		<XReactionIcon :reaction="reaction" :custom-emojis="emojis" class="icon" :no-style="true"/>
 		<div class="name">{{ reaction.replace('@.', '') }}</div>
@@ -15,11 +15,11 @@ import XReactionIcon from './reaction-icon.vue';
 const props = defineProps<{
 	reaction: string;
 	emojis: any[]; // TODO
-	source: any; // TODO
+	targetElement: HTMLElement;
 }>();
 
 const emit = defineEmits<{
-	(e: 'closed'): void;
+	(ev: 'closed'): void;
 }>();
 </script>
 
diff --git a/packages/client/src/components/reactions-viewer.details.vue b/packages/client/src/components/reactions-viewer.details.vue
index 8cec8dfa2f..eb889c4888 100644
--- a/packages/client/src/components/reactions-viewer.details.vue
+++ b/packages/client/src/components/reactions-viewer.details.vue
@@ -1,5 +1,5 @@
 <template>
-<MkTooltip ref="tooltip" :source="source" :max-width="340" @closed="emit('closed')">
+<MkTooltip ref="tooltip" :target-element="targetElement" :max-width="340" @closed="emit('closed')">
 	<div class="bqxuuuey">
 		<div class="reaction">
 			<XReactionIcon :reaction="reaction" :custom-emojis="emojis" class="icon" :no-style="true"/>
@@ -26,11 +26,11 @@ const props = defineProps<{
 	users: any[]; // TODO
 	count: number;
 	emojis: any[]; // TODO
-	source: any; // TODO
+	targetElement: HTMLElement;
 }>();
 
 const emit = defineEmits<{
-	(e: 'closed'): void;
+	(ev: 'closed'): void;
 }>();
 </script>
 
diff --git a/packages/client/src/components/renote.details.vue b/packages/client/src/components/renote.details.vue
index cdbc71bdce..2df19bcd3f 100644
--- a/packages/client/src/components/renote.details.vue
+++ b/packages/client/src/components/renote.details.vue
@@ -1,5 +1,5 @@
 <template>
-<MkTooltip ref="tooltip" :source="source" :max-width="250" @closed="emit('closed')">
+<MkTooltip ref="tooltip" :target-element="targetElement" :max-width="250" @closed="emit('closed')">
 	<div class="beaffaef">
 		<div v-for="u in users" :key="u.id" class="user">
 			<MkAvatar class="avatar" :user="u"/>
@@ -17,11 +17,11 @@ import MkTooltip from './ui/tooltip.vue';
 const props = defineProps<{
 	users: any[]; // TODO
 	count: number;
-	source: any; // TODO
+	targetElement: HTMLElement;
 }>();
 
 const emit = defineEmits<{
-	(e: 'closed'): void;
+	(ev: 'closed'): void;
 }>();
 </script>
 
diff --git a/packages/client/src/components/ui/tooltip.vue b/packages/client/src/components/ui/tooltip.vue
index e2721ed69a..1892877cc1 100644
--- a/packages/client/src/components/ui/tooltip.vue
+++ b/packages/client/src/components/ui/tooltip.vue
@@ -12,9 +12,11 @@ import * as os from '@/os';
 
 const props = withDefaults(defineProps<{
 	showing: boolean;
-	source: HTMLElement;
+	targetElement?: HTMLElement;
+	x?: number;
+	y?: number;
 	text?: string;
-	maxWidth?; number;
+	maxWidth?: number;
 }>(), {
 	maxWidth: 250,
 });
@@ -29,13 +31,25 @@ const zIndex = os.claimZIndex('high');
 const setPosition = () => {
 	if (el.value == null) return;
 
-	const rect = props.source.getBoundingClientRect();
-
 	const contentWidth = el.value.offsetWidth;
 	const contentHeight = el.value.offsetHeight;
 
-	let left = rect.left + window.pageXOffset + (props.source.offsetWidth / 2);
-	let top = rect.top + window.pageYOffset - contentHeight;
+	let left: number;
+	let top: number;
+
+	let rect: DOMRect;
+
+	if (props.targetElement) {
+		rect = props.targetElement.getBoundingClientRect();
+
+		left = rect.left + window.pageXOffset + (props.targetElement.offsetWidth / 2);
+		top = rect.top + window.pageYOffset - contentHeight;
+
+		el.value.style.transformOrigin = 'center bottom';
+	} else {
+		left = props.x;
+		top = props.y - contentHeight;
+	}
 
 	left -= (el.value.offsetWidth / 2);
 
@@ -43,9 +57,14 @@ const setPosition = () => {
 		left = window.innerWidth - contentWidth + window.pageXOffset - 1;
 	}
 
+	// ツールチップを上に向かって表示するスペースがなければ下に向かって出す
 	if (top - window.pageYOffset < 0) {
-		top = rect.top + window.pageYOffset + props.source.offsetHeight;
-		el.value.style.transformOrigin = 'center top';
+		if (props.targetElement) {
+			top = rect.top + window.pageYOffset + props.targetElement.offsetHeight;
+			el.value.style.transformOrigin = 'center top';
+		} else {
+			top = props.y;
+		}
 	}
 
 	el.value.style.left = left + 'px';
@@ -54,11 +73,6 @@ const setPosition = () => {
 
 onMounted(() => {
 	nextTick(() => {
-		if (props.source == null) {
-			emit('closed');
-			return;
-		}
-
 		setPosition();
 
 		let loopHandler;
@@ -101,6 +115,6 @@ onMounted(() => {
 	border-radius: 4px;
 	border: solid 0.5px var(--divider);
 	pointer-events: none;
-	transform-origin: center bottom;
+	transform-origin: center center;
 }
 </style>
diff --git a/packages/client/src/directives/tooltip.ts b/packages/client/src/directives/tooltip.ts
index fffde14874..dd715227a4 100644
--- a/packages/client/src/directives/tooltip.ts
+++ b/packages/client/src/directives/tooltip.ts
@@ -48,7 +48,7 @@ export default {
 			popup(import('@/components/ui/tooltip.vue'), {
 				showing,
 				text: self.text,
-				source: el
+				targetElement: el,
 			}, {}, 'closed');
 
 			self._close = () => {
@@ -56,8 +56,8 @@ export default {
 			};
 		};
 
-		el.addEventListener('selectstart', e => {
-			e.preventDefault();
+		el.addEventListener('selectstart', ev => {
+			ev.preventDefault();
 		});
 
 		el.addEventListener(start, () => {