diff --git a/packages/frontend/src/components/MkEmojiPicker.vue b/packages/frontend/src/components/MkEmojiPicker.vue
index 7eff63748..5b420c499 100644
--- a/packages/frontend/src/components/MkEmojiPicker.vue
+++ b/packages/frontend/src/components/MkEmojiPicker.vue
@@ -5,7 +5,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <template>
 <div class="omfetrab" :class="['s' + size, 'w' + width, 'h' + height, { asDrawer, asWindow }]" :style="{ maxHeight: maxHeight ? maxHeight + 'px' : undefined }">
-	<input ref="searchEl" :value="q" class="search" data-prevent-emoji-insert :class="{ filled: q != null && q != '' }" :placeholder="i18n.ts.search" type="search" @input="input()" @paste.stop="paste" @keydown.stop.prevent.enter="onEnter">
+	<input ref="searchEl" :value="q" class="search" data-prevent-emoji-insert :class="{ filled: q != null && q != '' }" :placeholder="i18n.ts.search" type="search" autocapitalize="off" @input="input()" @paste.stop="paste" @keydown.stop.prevent.enter="onEnter">
 	<!-- FirefoxのTabフォーカスが想定外の挙動となるためtabindex="-1"を追加 https://github.com/misskey-dev/misskey/issues/10744 -->
 	<div ref="emojisEl" class="emojis" tabindex="-1">
 		<section class="result">
diff --git a/packages/frontend/src/components/MkInput.vue b/packages/frontend/src/components/MkInput.vue
index 5cfd7eb53..72babfac7 100644
--- a/packages/frontend/src/components/MkInput.vue
+++ b/packages/frontend/src/components/MkInput.vue
@@ -20,6 +20,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			:placeholder="placeholder"
 			:pattern="pattern"
 			:autocomplete="autocomplete"
+			:autocapitalize="autocapitalize"
 			:spellcheck="spellcheck"
 			:step="step"
 			:list="id"
@@ -58,6 +59,7 @@ const props = defineProps<{
 	placeholder?: string;
 	autofocus?: boolean;
 	autocomplete?: string;
+	autocapitalize?: string;
 	spellcheck?: boolean;
 	step?: any;
 	datalist?: string[];
diff --git a/packages/frontend/src/pages/about.emojis.vue b/packages/frontend/src/pages/about.emojis.vue
index c8f56f167..c9bb6f897 100644
--- a/packages/frontend/src/pages/about.emojis.vue
+++ b/packages/frontend/src/pages/about.emojis.vue
@@ -8,7 +8,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	<MkButton v-if="$i && ($i.isModerator || $i.policies.canManageCustomEmojis)" primary link to="/custom-emojis-manager">{{ i18n.ts.manageCustomEmojis }}</MkButton>
 
 	<div class="query">
-		<MkInput v-model="q" class="" :placeholder="i18n.ts.search">
+		<MkInput v-model="q" class="" :placeholder="i18n.ts.search" autocapitalize="off">
 			<template #prefix><i class="ti ti-search"></i></template>
 		</MkInput>
 
diff --git a/packages/frontend/src/pages/custom-emojis-manager.vue b/packages/frontend/src/pages/custom-emojis-manager.vue
index bee73045b..7450cf97c 100644
--- a/packages/frontend/src/pages/custom-emojis-manager.vue
+++ b/packages/frontend/src/pages/custom-emojis-manager.vue
@@ -10,7 +10,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<MkSpacer :contentMax="900">
 			<div class="ogwlenmc">
 				<div v-if="tab === 'local'" class="local">
-					<MkInput v-model="query" :debounce="true" type="search">
+					<MkInput v-model="query" :debounce="true" type="search" autocapitalize="off">
 						<template #prefix><i class="ti ti-search"></i></template>
 						<template #label>{{ i18n.ts.search }}</template>
 					</MkInput>
@@ -44,7 +44,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 				<div v-else-if="tab === 'remote'" class="remote">
 					<FormSplit>
-						<MkInput v-model="queryRemote" :debounce="true" type="search">
+						<MkInput v-model="queryRemote" :debounce="true" type="search" autocapitalize="off">
 							<template #prefix><i class="ti ti-search"></i></template>
 							<template #label>{{ i18n.ts.search }}</template>
 						</MkInput>
diff --git a/packages/frontend/src/pages/emoji-edit-dialog.vue b/packages/frontend/src/pages/emoji-edit-dialog.vue
index 2e6050490..5bce74aa9 100644
--- a/packages/frontend/src/pages/emoji-edit-dialog.vue
+++ b/packages/frontend/src/pages/emoji-edit-dialog.vue
@@ -31,13 +31,13 @@ SPDX-License-Identifier: AGPL-3.0-only
 					</div>
 				</div>
 				<MkButton rounded style="margin: 0 auto;" @click="changeImage">{{ i18n.ts.selectFile }}</MkButton>
-				<MkInput v-model="name" pattern="[a-z0-9_]">
+				<MkInput v-model="name" pattern="[a-z0-9_]" autocapitalize="off">
 					<template #label>{{ i18n.ts.name }}</template>
 				</MkInput>
 				<MkInput v-model="category" :datalist="customEmojiCategories">
 					<template #label>{{ i18n.ts.category }}</template>
 				</MkInput>
-				<MkInput v-model="aliases">
+				<MkInput v-model="aliases" autocapitalize="off">
 					<template #label>{{ i18n.ts.tags }}</template>
 					<template #caption>{{ i18n.ts.setMultipleBySeparatingWithSpace }}</template>
 				</MkInput>