diff --git a/packages/frontend/src/os.ts b/packages/frontend/src/os.ts
index c56631fe3c..9d199738f6 100644
--- a/packages/frontend/src/os.ts
+++ b/packages/frontend/src/os.ts
@@ -5,9 +5,9 @@
 
 // TODO: なんでもかんでもos.tsに突っ込むのやめたいのでよしなに分割する
 
-import { markRaw, ref, defineAsyncComponent, nextTick, effectScope, isRef, shallowReactive, watch } from 'vue';
+import { markRaw, ref, defineAsyncComponent, nextTick } from 'vue';
 import * as Misskey from 'misskey-js';
-import type { Component, MaybeRef, ShallowReactive } from 'vue';
+import type { Component, MaybeRef } from 'vue';
 import type { ComponentEmit, ComponentProps as CP } from 'vue-component-type-helpers';
 import type { Form, GetFormResultType } from '@/utility/form.js';
 import type { MenuItem } from '@/types/menu.js';
@@ -145,7 +145,7 @@ let popupIdCount = 0;
 export const popups = ref<{
 	id: number;
 	component: Component;
-	props: ShallowReactive<Record<string, any>>;
+	props: Record<string, any>;
 	events: Record<string, any>;
 }[]>([]);
 
@@ -183,32 +183,6 @@ type ComponentEmitsObject<C extends Component, IE = OverloadToUnion<ComponentEmi
 		: (...args: any[]) => void;
 }>;
 
-// ref をそのまま保持せず popup 側の reactive props に同期するようにして、スコープをまたいでリアクティビティが切れるのを防止する
-function normalizePopupProps<T extends Record<string, any>>(props: T): {
-	resolvedProps: ShallowReactive<T>;
-	stopSync: () => void;
-} {
-	const resolvedProps = shallowReactive<T>({} as T) as T; // shallowReactiveの返り値はreadonlyだが、実際には書き換えるので元の型で扱う
-	const scope = effectScope();
-
-	scope.run(() => {
-		for (const [key, value] of Object.entries(props)) {
-			if (isRef(value)) {
-				watch(value, (resolvedValue) => {
-					resolvedProps[key as keyof T] = resolvedValue as T[keyof T];
-				}, { immediate: true });
-			} else {
-				resolvedProps[key as keyof T] = value;
-			}
-		}
-	});
-
-	return {
-		resolvedProps: resolvedProps as ShallowReactive<T>,
-		stopSync: () => scope.stop(),
-	};
-}
-
 // NOTE: ジェネリック型つきのコンポーネントでは、emitsの型推論がうまく働かない（型変数を取り出すことはできないため）
 // NOTE: emitsがOverloadToUnionで対応しているオーバーロードの数を超える場合は、OverloadToUnionの個数を増やせばOK
 export function popup<T extends Component>(
@@ -219,24 +193,20 @@ export function popup<T extends Component>(
 	markRaw(component);
 
 	const id = ++popupIdCount;
-	const { resolvedProps, stopSync } = normalizePopupProps(props);
-	let disposed = false;
 	const dispose = () => {
-		if (disposed) return;
-		disposed = true;
-		stopSync();
-
+		// このsetTimeoutが無いと挙動がおかしくなる(autocompleteが閉じなくなる)。Vueのバグ？
 		nextTick(() => {
 			popups.value = popups.value.filter(p => p.id !== id);
 		});
 	};
-
-	popups.value.push({
+	const state = {
 		component,
-		props: resolvedProps,
+		props,
 		events,
 		id,
-	});
+	};
+
+	popups.value.push(state);
 
 	return {
 		dispose,
diff --git a/packages/frontend/src/utility/emoji-picker.ts b/packages/frontend/src/utility/emoji-picker.ts
index c663776de3..2ec8bb9779 100644
--- a/packages/frontend/src/utility/emoji-picker.ts
+++ b/packages/frontend/src/utility/emoji-picker.ts
@@ -3,9 +3,9 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { defineAsyncComponent, ref, watch } from 'vue';
-import type { Ref } from 'vue';
-import { popup } from '@/os.js';
+import { markRaw, shallowRef, ref, watch } from 'vue';
+import type MkEmojiPickerDialog__TypeReferenceOnly from '@/components/MkEmojiPickerDialog.vue';
+import { popup, popupAsyncWithDialog } from '@/os.js';
 import { prefer } from '@/preferences.js';
 
 /**
@@ -15,53 +15,77 @@ import { prefer } from '@/preferences.js';
  * 一度表示したダイアログを連続で使用できることが望ましいシーンでの利用が想定される。
  */
 class EmojiPicker {
-	private anchorElement: Ref<HTMLElement | null> = ref(null);
-	private manualShowing = ref(false);
-	private onChosen?: (emoji: string) => void;
-	private onClosed?: () => void;
+	private loadedComponent: typeof MkEmojiPickerDialog__TypeReferenceOnly | null = null;
+	private emojisRef = ref<string[]>([]);
 
 	constructor() {
 		// nop
 	}
 
-	public async init() {
-		const emojisRef = ref<string[]>([]);
-
-		watch([prefer.r.emojiPaletteForMain, prefer.r.emojiPalettes], () => {
-			emojisRef.value = prefer.s.emojiPaletteForMain == null ? prefer.s.emojiPalettes[0].emojis : prefer.s.emojiPalettes.find(palette => palette.id === prefer.s.emojiPaletteForMain)?.emojis ?? [];
-		}, {
-			immediate: true,
+	public init() {
+		// コンポーネントをプリロードしてキャッシュしておく。
+		// iOS PWA では await を挟むとユーザーアクティベーションが失われfocusが効かなくなるため、
+		// show() 呼び出し時には同期的に popup() できるよう事前にコンポーネントを解決しておく。
+		import('@/components/MkEmojiPickerDialog.vue').then(m => {
+			this.loadedComponent = markRaw(m.default);
+		}).catch(err => {
+			console.error('[EmojiPicker] Failed to preload MkEmojiPickerDialog:', err);
 		});
 
-		await popup(defineAsyncComponent(() => import('@/components/MkEmojiPickerDialog.vue')), {
-			anchorElement: this.anchorElement,
-			pinnedEmojis: emojisRef,
-			asReactionPicker: false,
-			manualShowing: this.manualShowing,
-			choseAndClose: false,
+		watch([prefer.r.emojiPaletteForMain, prefer.r.emojiPalettes], () => {
+			this.emojisRef.value = prefer.s.emojiPaletteForMain == null ? prefer.s.emojiPalettes[0].emojis : prefer.s.emojiPalettes.find(palette => palette.id === prefer.s.emojiPaletteForMain)?.emojis ?? [];
 		}, {
-			done: emoji => {
-				if (this.onChosen) this.onChosen(emoji);
-			},
-			close: () => {
-				this.manualShowing.value = false;
-			},
-			closed: () => {
-				this.anchorElement.value = null;
-				if (this.onClosed) this.onClosed();
-			},
+			immediate: true,
 		});
 	}
 
 	public show(
 		anchorElement: HTMLElement,
-		onChosen?: EmojiPicker['onChosen'],
-		onClosed?: EmojiPicker['onClosed'],
+		onChosen?: (emoji: string) => void,
+		onClosed?: () => void,
 	) {
-		this.anchorElement.value = anchorElement;
-		this.manualShowing.value = true;
-		this.onChosen = onChosen;
-		this.onClosed = onClosed;
+		const anchorRef = shallowRef(anchorElement);
+
+		if (this.loadedComponent) {
+			// コンポーネント解決済みのため同期的に popup() できる。
+			// ユーザーアクティベーションコンテキストが維持されiOSでもfocusが機能する。
+			const { dispose } = popup(this.loadedComponent, {
+				anchorElement: anchorRef,
+				pinnedEmojis: this.emojisRef,
+				asReactionPicker: false,
+				choseAndClose: false,
+			}, {
+				done: (emoji: string) => {
+					if (onChosen) onChosen(emoji);
+				},
+				closed: () => {
+					if (onClosed) onClosed();
+					dispose();
+				},
+			});
+		} else {
+			// フォールバック: 初回タップがプリロード完了前
+			popupAsyncWithDialog(
+				import('@/components/MkEmojiPickerDialog.vue').then(m => {
+					this.loadedComponent = markRaw(m.default);
+					return this.loadedComponent;
+				}),
+				{
+					anchorElement: anchorRef,
+					pinnedEmojis: this.emojisRef,
+					asReactionPicker: false,
+					choseAndClose: false,
+				},
+				{
+					done: (emoji: string) => {
+						if (onChosen) onChosen(emoji);
+					},
+					closed: () => {
+						if (onClosed) onClosed();
+					},
+				},
+			);
+		}
 	}
 }
 
diff --git a/packages/frontend/src/utility/reaction-picker.ts b/packages/frontend/src/utility/reaction-picker.ts
index e33346101d..49114664cf 100644
--- a/packages/frontend/src/utility/reaction-picker.ts
+++ b/packages/frontend/src/utility/reaction-picker.ts
@@ -4,57 +4,85 @@
  */
 
 import * as Misskey from 'misskey-js';
-import { defineAsyncComponent, ref, watch } from 'vue';
-import type { Ref } from 'vue';
-import { popup } from '@/os.js';
+import { markRaw, shallowRef, ref, watch } from 'vue';
+import type MkEmojiPickerDialog__TypeReferenceOnly from '@/components/MkEmojiPickerDialog.vue';
+import { popup, popupAsyncWithDialog } from '@/os.js';
 import { prefer } from '@/preferences.js';
 
 class ReactionPicker {
-	private anchorElement: Ref<HTMLElement | null> = ref(null);
-	private manualShowing = ref(false);
-	private targetNote: Ref<Misskey.entities.Note | null> = ref(null);
-	private onChosen?: (reaction: string) => void;
-	private onClosed?: () => void;
+	private loadedComponent: typeof MkEmojiPickerDialog__TypeReferenceOnly | null = null;
+	private reactionsRef = ref<string[]>([]);
 
 	constructor() {
 		// nop
 	}
 
-	public async init() {
-		const reactionsRef = ref<string[]>([]);
+	public init() {
+		// コンポーネントをプリロードしてキャッシュしておく。
+		// iOS PWA では await を挟むとユーザーアクティベーションが失われfocusが効かなくなるため、
+		// show() 呼び出し時には同期的に popup() できるよう事前にコンポーネントを解決しておく。
+		import('@/components/MkEmojiPickerDialog.vue').then(m => {
+			this.loadedComponent = markRaw(m.default);
+		}).catch(err => {
+			console.error('[ReactionPicker] Failed to preload MkEmojiPickerDialog:', err);
+		});
 
 		watch([prefer.r.emojiPaletteForReaction, prefer.r.emojiPalettes], () => {
-			reactionsRef.value = prefer.s.emojiPaletteForReaction == null ? prefer.s.emojiPalettes[0].emojis : prefer.s.emojiPalettes.find(palette => palette.id === prefer.s.emojiPaletteForReaction)?.emojis ?? [];
+			this.reactionsRef.value = prefer.s.emojiPaletteForReaction == null ? prefer.s.emojiPalettes[0].emojis : prefer.s.emojiPalettes.find(palette => palette.id === prefer.s.emojiPaletteForReaction)?.emojis ?? [];
 		}, {
 			immediate: true,
 		});
-
-		await popup(defineAsyncComponent(() => import('@/components/MkEmojiPickerDialog.vue')), {
-			anchorElement: this.anchorElement,
-			pinnedEmojis: reactionsRef,
-			asReactionPicker: true,
-			targetNote: this.targetNote,
-			manualShowing: this.manualShowing,
-		}, {
-			done: reaction => {
-				if (this.onChosen) this.onChosen(reaction);
-			},
-			close: () => {
-				this.manualShowing.value = false;
-			},
-			closed: () => {
-				this.anchorElement.value = null;
-				if (this.onClosed) this.onClosed();
-			},
-		});
 	}
 
-	public show(anchorElement: HTMLElement | null, targetNote: Misskey.entities.Note | null, onChosen?: ReactionPicker['onChosen'], onClosed?: ReactionPicker['onClosed']) {
-		this.anchorElement.value = anchorElement;
-		this.targetNote.value = targetNote;
-		this.manualShowing.value = true;
-		this.onChosen = onChosen;
-		this.onClosed = onClosed;
+	public show(
+		anchorElement: HTMLElement | null,
+		targetNote: Misskey.entities.Note | null,
+		onChosen?: (reaction: string) => void,
+		onClosed?: () => void,
+	) {
+		const anchorRef = shallowRef(anchorElement);
+		const targetNoteRef = ref(targetNote);
+
+		if (this.loadedComponent) {
+			// 通常パス: コンポーネント解決済みのため同期的に popup() できる。
+			// ユーザーアクティベーションコンテキストが維持されiOSでもfocusが機能する。
+			const { dispose } = popup(this.loadedComponent, {
+				anchorElement: anchorRef,
+				pinnedEmojis: this.reactionsRef,
+				asReactionPicker: true,
+				targetNote: targetNoteRef,
+			}, {
+				done: (reaction: string) => {
+					if (onChosen) onChosen(reaction);
+				},
+				closed: () => {
+					if (onClosed) onClosed();
+					dispose();
+				},
+			});
+		} else {
+			// フォールバック: 初回タップがプリロード完了前
+			popupAsyncWithDialog(
+				import('@/components/MkEmojiPickerDialog.vue').then(m => {
+					this.loadedComponent = markRaw(m.default);
+					return this.loadedComponent;
+				}),
+				{
+					anchorElement: anchorRef,
+					pinnedEmojis: this.reactionsRef,
+					asReactionPicker: true,
+					targetNote: targetNoteRef,
+				},
+				{
+					done: (reaction: string) => {
+						if (onChosen) onChosen(reaction);
+					},
+					closed: () => {
+						if (onClosed) onClosed();
+					},
+				},
+			);
+		}
 	}
 }