diff --git a/src/client/components/note.vue b/src/client/components/note.vue
index 9bbf763494..fba812fc71 100644
--- a/src/client/components/note.vue
+++ b/src/client/components/note.vue
@@ -40,14 +40,14 @@
 			<x-note-header class="header" :note="appearNote" :mini="true"/>
 			<div class="body" ref="noteBody">
 				<p v-if="appearNote.cw != null" class="cw">
-				<mfm v-if="appearNote.cw != ''" class="text" :text="appearNote.cw" :author="appearNote.user" :i="$store.state.i" :custom-emojis="emojis" v-once/>
+				<mfm v-if="appearNote.cw != ''" class="text" :text="appearNote.cw" :author="appearNote.user" :i="$store.state.i" :custom-emojis="appearNote.emojis" v-once/>
 					<x-cw-button v-model="showContent" :note="appearNote"/>
 				</p>
 				<div class="content" v-show="appearNote.cw == null || showContent">
 					<div class="text">
 						<span v-if="appearNote.isHidden" style="opacity: 0.5">({{ $t('private') }})</span>
 						<router-link class="reply" v-if="appearNote.replyId" :to="`/notes/${appearNote.replyId}`"><fa :icon="faReply"/></router-link>
-						<mfm v-if="appearNote.text" :text="appearNote.text" :author="appearNote.user" :i="$store.state.i" :custom-emojis="emojis" v-once/>
+						<mfm v-if="appearNote.text" :text="appearNote.text" :author="appearNote.user" :i="$store.state.i" :custom-emojis="appearNote.emojis" v-once/>
 						<a class="rp" v-if="appearNote.renote != null">RN:</a>
 					</div>
 					<div class="files" v-if="appearNote.files.length > 0">
@@ -59,7 +59,7 @@
 				</div>
 			</div>
 			<footer class="footer">
-				<x-reactions-viewer :note="appearNote" :reactions="reactions" :my-reaction="myReaction" :emojis="emojis" ref="reactionsViewer"/>
+				<x-reactions-viewer :note="appearNote" ref="reactionsViewer"/>
 				<button @click="reply()" class="button _button">
 					<template v-if="appearNote.reply"><fa :icon="faReplyAll"/></template>
 					<template v-else><fa :icon="faReply"/></template>
@@ -71,10 +71,10 @@
 				<button v-else class="button _button">
 					<fa :icon="faBan"/>
 				</button>
-				<button v-if="!isMyNote && myReaction == null" class="button _button" @click="react()" ref="reactButton">
+				<button v-if="!isMyNote && appearNote.myReaction == null" class="button _button" @click="react()" ref="reactButton">
 					<fa :icon="faPlus"/>
 				</button>
-				<button v-if="!isMyNote && myReaction != null" class="button _button reacted" @click="undoReact()" ref="reactButton">
+				<button v-if="!isMyNote && appearNote.myReaction != null" class="button _button reacted" @click="undoReact(appearNote)" ref="reactButton">
 					<fa :icon="faMinus"/>
 				</button>
 				<button class="button _button" @click="menu()" ref="menuButton">
@@ -116,6 +116,11 @@ import copyToClipboard from '../scripts/copy-to-clipboard';
 import { checkWordMute } from '../scripts/check-word-mute';
 
 export default Vue.extend({
+	model: {
+		prop: 'note',
+		event: 'updated'
+	},
+
 	components: {
 		XSub,
 		XNoteHeader,
@@ -152,9 +157,6 @@ export default Vue.extend({
 			showContent: false,
 			isDeleted: false,
 			muted: false,
-			myReaction: null,
-			reactions: {},
-			emojis: [],
 			noteBody: this.$refs.noteBody,
 			faEdit, faBolt, faTimes, faBullhorn, faPlus, faMinus, faRetweet, faReply, faReplyAll, faEllipsisH, faHome, faUnlock, faEnvelope, faThumbtack, faBan, faBiohazard, faPlug
 		};
@@ -211,7 +213,9 @@ export default Vue.extend({
 		},
 
 		reactionsCount(): number {
-			return sum(Object.values(this.reactions));
+			return this.appearNote.reactions
+				? sum(Object.values(this.appearNote.reactions))
+				: 0;
 		},
 
 		urls(): string[] {
@@ -242,9 +246,8 @@ export default Vue.extend({
 			this.connection = this.$root.stream;
 		}
 
-		this.emojis = [...this.appearNote.emojis];
-		this.reactions = { ...this.appearNote.reactions };
-		this.myReaction = this.appearNote.myReaction;
+		console.log(this.note);
+
 		this.muted = await checkWordMute(this.appearNote, this.$store.state.i, this.$store.state.settings.mutedWords);
 
 		if (this.detail) {
@@ -284,6 +287,19 @@ export default Vue.extend({
 	},
 
 	methods: {
+		updateAppearNote(v) {
+			this.$emit('updated', Object.freeze(this.isRenote ? {
+				...this.note,
+				renote: {
+					...this.note.renote,
+					...v
+				}
+			} : {
+				...this.note,
+				...v
+			}));
+		},
+
 		readPromo() {
 			(this as any).$root.api('promo/read', {
 				noteId: this.appearNote.id
@@ -320,47 +336,83 @@ export default Vue.extend({
 				case 'reacted': {
 					const reaction = body.reaction;
 
+					// DeepではなくShallowコピーであることに注意。n.reactions[reaction] = hogeとかしないように(親からもらったデータをミューテートすることになるので)
+					let n = {
+						...this.appearNote,
+					};
+
 					if (body.emoji) {
-						if (!this.emojis.includes(body.emoji)) {
-							this.emojis.push(body.emoji);
+						const emojis = this.appearNote.emojis || [];
+						if (!emojis.includes(body.emoji)) {
+							n.emojis = [...emojis, body.emoji];
 						}
 					}
 
-					if (this.reactions[reaction] == null) {
-						Vue.set(this.reactions, reaction, 0);
-					}
+					// TODO: reactionsプロパティがない場合ってあったっけ？ なければ || {} は消せる
+					const currentCount = (this.appearNote.reactions || {})[reaction] || 0;
 
 					// Increment the count
-					this.reactions[reaction]++;
+					n.reactions = {
+						...this.appearNote.reactions,
+						[reaction]: currentCount + 1
+					};
 
 					if (body.userId === this.$store.state.i.id) {
-						this.myReaction = reaction;
+						n.myReaction = reaction;
 					}
+
+					this.updateAppearNote(n);
 					break;
 				}
 
 				case 'unreacted': {
 					const reaction = body.reaction;
 
-					if (this.reactions[reaction] == null) {
-						return;
-					}
+					// DeepではなくShallowコピーであることに注意。n.reactions[reaction] = hogeとかしないように(親からもらったデータをミューテートすることになるので)
+					let n = {
+						...this.appearNote,
+					};
+
+					// TODO: reactionsプロパティがない場合ってあったっけ？ なければ || {} は消せる
+					const currentCount = (this.appearNote.reactions || {})[reaction] || 0;
 
 					// Decrement the count
-					if (this.reactions[reaction] > 0) this.reactions[reaction]--;
+					n.reactions = {
+						...this.appearNote.reactions,
+						[reaction]: Math.max(0, currentCount - 1)
+					};
 
 					if (body.userId === this.$store.state.i.id) {
-						this.myReaction = null;
+						n.myReaction = null;
 					}
+
+					this.updateAppearNote(n);
 					break;
 				}
 
 				case 'pollVoted': {
 					const choice = body.choice;
-					this.appearNote.poll.choices[choice].votes++;
-					if (body.userId === this.$store.state.i.id) {
-						Vue.set(this.appearNote.poll.choices[choice], 'isVoted', true);
-					}
+
+					// DeepではなくShallowコピーであることに注意。n.reactions[reaction] = hogeとかしないように(親からもらったデータをミューテートすることになるので)
+					let n = {
+						...this.appearNote,
+					};
+
+					n.poll = {
+						...this.appearNote.poll,
+						choices: {
+							...this.appearNote.poll.choices,
+							[choice]: {
+								...this.appearNote.poll.choices[choice],
+								votes: this.appearNote.poll.choices[choice].votes + 1,
+								...(body.userId === this.$store.state.i.id ? {
+									isVoted: true
+								} : {})
+							}
+						}
+					};
+
+					this.updateAppearNote(n);
 					break;
 				}
 
@@ -438,11 +490,11 @@ export default Vue.extend({
 			});
 		},
 
-		undoReact() {
-			const oldReaction = this.myReaction;
+		undoReact(note) {
+			const oldReaction = note.myReaction;
 			if (!oldReaction) return;
 			this.$root.api('notes/reactions/delete', {
-				noteId: this.appearNote.id
+				noteId: note.id
 			});
 		},
 
diff --git a/src/client/components/notes.vue b/src/client/components/notes.vue
index 7653062ba0..2ae8f696f6 100644
--- a/src/client/components/notes.vue
+++ b/src/client/components/notes.vue
@@ -15,7 +15,7 @@
 	</div>
 
 	<x-list ref="notes" :items="notes" v-slot="{ item: note }" :direction="reversed ? 'up' : 'down'" :reversed="reversed">
-		<x-note :note="note" :detail="detail" :key="note._featuredId_ || note._prId_ || note.id"/>
+		<x-note :note="note" @updated="updated(note, $event)" :detail="detail" :key="note._featuredId_ || note._prId_ || note.id"/>
 	</x-list>
 
 	<div v-show="more && !reversed" style="margin-top: var(--margin);">
@@ -62,14 +62,15 @@ export default Vue.extend({
 			default: false
 		},
 
-		extract: {
+		prop: {
+			type: String,
 			required: false
 		}
 	},
 
 	computed: {
 		notes(): any[] {
-			return this.extract ? this.extract(this.items) : this.items;
+			return this.prop ? this.items.map(item => item[this.prop]) : this.items;
 		},
 
 		reversed(): boolean {
@@ -78,6 +79,15 @@ export default Vue.extend({
 	},
 
 	methods: {
+		updated(oldValue, newValue) {
+			const i = this.notes.findIndex(n => n === oldValue);
+			if (this.prop) {
+				Vue.set(this.items[i], this.prop, newValue);
+			} else {
+				Vue.set(this.items, i, newValue);
+			}
+		},
+
 		focus() {
 			this.$refs.notes.focus();
 		}
diff --git a/src/client/components/reactions-viewer.reaction.vue b/src/client/components/reactions-viewer.reaction.vue
index 97d019d17f..639a1603ca 100644
--- a/src/client/components/reactions-viewer.reaction.vue
+++ b/src/client/components/reactions-viewer.reaction.vue
@@ -1,7 +1,7 @@
 <template>
 <button
 	class="hkzvhatu _button"
-	:class="{ reacted: myReaction == reaction, canToggle }"
+	:class="{ reacted: note.myReaction == reaction, canToggle }"
 	@click="toggleReaction(reaction)"
 	v-if="count > 0"
 	@touchstart="onMouseover"
@@ -11,7 +11,7 @@
 	ref="reaction"
 	v-particle="canToggle"
 >
-	<x-reaction-icon :reaction="reaction" :custom-emojis="emojis" ref="icon"/>
+	<x-reaction-icon :reaction="reaction" :custom-emojis="note.emojis" ref="icon"/>
 	<span>{{ count }}</span>
 </button>
 </template>
@@ -30,14 +30,6 @@ export default Vue.extend({
 			type: String,
 			required: true,
 		},
-		myReaction: {
-			type: String,
-			required: false,
-		},
-		emojis: {
-			type: Array,
-			required: true,
-		},
 		count: {
 			type: Number,
 			required: true,
@@ -79,7 +71,7 @@ export default Vue.extend({
 		toggleReaction() {
 			if (!this.canToggle) return;
 
-			const oldReaction = this.myReaction;
+			const oldReaction = this.note.myReaction;
 			if (oldReaction) {
 				this.$root.api('notes/reactions/delete', {
 					noteId: this.note.id
diff --git a/src/client/components/reactions-viewer.vue b/src/client/components/reactions-viewer.vue
index 353e72ccfa..88e7df4646 100644
--- a/src/client/components/reactions-viewer.vue
+++ b/src/client/components/reactions-viewer.vue
@@ -1,6 +1,6 @@
 <template>
 <div class="tdflqwzn" :class="{ isMe }">
-	<x-reaction v-for="(count, reaction) in reactions" :reaction="reaction" :count="count" :is-initial="initialReactions.has(reaction)" :note="note" :my-reaction="myReaction" :emojis="emojis" :key="reaction"/>
+	<x-reaction v-for="(count, reaction) in note.reactions" :reaction="reaction" :count="count" :is-initial="initialReactions.has(reaction)" :note="note" :key="reaction"/>
 </div>
 </template>
 
@@ -12,28 +12,16 @@ export default Vue.extend({
 	components: {
 		XReaction
 	},
+	data() {
+		return {
+			initialReactions: new Set(Object.keys(this.note.reactions))
+		};
+	},
 	props: {
 		note: {
 			type: Object,
 			required: true
 		},
-		reactions: {
-			type: Object,
-			required: true
-		},
-		myReaction: {
-			type: String,
-			required: false,
-		},
-		emojis: {
-			type: Array,
-			required: true,
-		},
-	},
-	data() {
-		return {
-			initialReactions: new Set(Object.keys(this.note.reactions))
-		};
 	},
 	computed: {
 		isMe(): boolean {
diff --git a/src/client/components/timeline.vue b/src/client/components/timeline.vue
index 5fd55e8ca2..28ff6ab1b3 100644
--- a/src/client/components/timeline.vue
+++ b/src/client/components/timeline.vue
@@ -52,7 +52,6 @@ export default Vue.extend({
 		});
 
 		const prepend = note => {
-			Object.freeze(note);
 			(this.$refs.tl as any).prepend(note);
 
 			this.$emit('note');
diff --git a/src/client/pages/favorites.vue b/src/client/pages/favorites.vue
index 59bef2ca91..0e625f84cf 100644
--- a/src/client/pages/favorites.vue
+++ b/src/client/pages/favorites.vue
@@ -2,7 +2,7 @@
 <div>
 	<portal to="icon"><fa :icon="faStar"/></portal>
 	<portal to="title">{{ $t('favorites') }}</portal>
-	<x-notes :pagination="pagination" :detail="true" :extract="items => items.map(item => item.note)" @before="before()" @after="after()"/>
+	<x-notes :pagination="pagination" :detail="true" :prop="'note'" @before="before()" @after="after()"/>
 </div>
 </template>
 
diff --git a/src/client/pages/instance/index.vue b/src/client/pages/instance/index.vue
index d21f8d455e..3aedcb65af 100644
--- a/src/client/pages/instance/index.vue
+++ b/src/client/pages/instance/index.vue
@@ -436,7 +436,7 @@ export default Vue.extend({
 		},
 
 		onStatsLog(statsLog) {
-			for (const stats of statsLog.reverse()) {
+			for (const stats of [...statsLog].reverse()) {
 				this.onStats(stats);
 			}
 		}
diff --git a/src/client/pages/instance/queue.queue.vue b/src/client/pages/instance/queue.queue.vue
index 1649d1e172..c2aa545fc0 100644
--- a/src/client/pages/instance/queue.queue.vue
+++ b/src/client/pages/instance/queue.queue.vue
@@ -169,7 +169,7 @@ export default Vue.extend({
 		},
 
 		onStatsLog(statsLog) {
-			for (const stats of statsLog.reverse()) {
+			for (const stats of [...statsLog].reverse()) {
 				this.onStats(stats);
 			}
 		},
diff --git a/src/client/pages/note.vue b/src/client/pages/note.vue
index 5464875dfb..3f42516323 100644
--- a/src/client/pages/note.vue
+++ b/src/client/pages/note.vue
@@ -14,7 +14,7 @@
 		<hr v-if="showNext"/>
 
 		<mk-remote-caution v-if="note.user.host != null" :href="note.url || note.uri" style="margin-bottom: var(--margin)"/>
-		<x-note :note="note" :key="note.id" :detail="true"/>
+		<x-note v-model="note" :key="note.id" :detail="true"/>
 
 		<button class="_panel _button" v-if="hasPrev && !showPrev" @click="showPrev = true" style="margin: var(--margin) auto 0 auto;"><fa :icon="faChevronDown"/></button>
 		<hr v-if="showPrev"/>
diff --git a/src/client/scripts/stream.ts b/src/client/scripts/stream.ts
index 4dcd3f1b2e..8a525ba002 100644
--- a/src/client/scripts/stream.ts
+++ b/src/client/scripts/stream.ts
@@ -112,10 +112,10 @@ export default class Stream extends EventEmitter {
 			}
 
 			for (const c of connections.filter(c => c != null)) {
-				c.emit(body.type, body.body);
+				c.emit(body.type, Object.freeze(body.body));
 			}
 		} else {
-			this.emit(type, body);
+			this.emit(type, Object.freeze(body));
 		}
 	}