diff --git a/packages/frontend/src/pages/settings/import-export.vue b/packages/frontend/src/pages/settings/import-export.vue
index e000c608fe..1f23b6c9d6 100644
--- a/packages/frontend/src/pages/settings/import-export.vue
+++ b/packages/frontend/src/pages/settings/import-export.vue
@@ -11,7 +11,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<MkFolder>
 				<template #label>{{ i18n.ts.export }}</template>
 				<template #icon><i class="ti ti-download"></i></template>
-				<MkButton primary :class="$style.button" inline @click="exportNotes()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
+				<MkButton primary :class="$style.button" :disabled="disableButtons" inline @click="exportNotes()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
 			</MkFolder>
 			<MkFolder v-if="$i && $i.policies.canImportNotes">
 				<template #label>{{ i18n.ts.import }}</template>
@@ -24,7 +24,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 					<option value="Instagram">Instagram</option>
 					<option value="Facebook">Facebook</option>
 				</MkRadios>
-				<MkButton primary :class="$style.button" inline @click="importNotes($event)"><i class="ph-upload ph-bold ph-lg"></i> {{ i18n.ts.import }}</MkButton>
+				<MkButton primary :class="$style.button" :disabled="disableButtons" inline @click="importNotes($event)"><i class="ph-upload ph-bold ph-lg"></i> {{ i18n.ts.import }}</MkButton>
 			</MkFolder>
 		</div>
 	</FormSection>
@@ -33,7 +33,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<MkFolder>
 			<template #label>{{ i18n.ts.export }}</template>
 			<template #icon><i class="ti ti-download"></i></template>
-			<MkButton primary :class="$style.button" inline @click="exportFavorites()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
+			<MkButton primary :class="$style.button" :disabled="disableButtons" inline @click="exportFavorites()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
 		</MkFolder>
 	</FormSection>
 	<FormSection>
@@ -41,7 +41,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<MkFolder>
 			<template #label>{{ i18n.ts.export }}</template>
 			<template #icon><i class="ti ti-download"></i></template>
-			<MkButton primary :class="$style.button" inline @click="exportClips()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
+			<MkButton primary :class="$style.button" :disabled="disableButtons" inline @click="exportClips()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
 		</MkFolder>
 	</FormSection>
 	<FormSection>
@@ -57,7 +57,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 					<MkSwitch v-model="excludeInactiveUsers">
 						{{ i18n.ts._exportOrImport.excludeInactiveUsers }}
 					</MkSwitch>
-					<MkButton primary :class="$style.button" inline @click="exportFollowing()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
+					<MkButton primary :class="$style.button" :disabled="disableButtons" inline @click="exportFollowing()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
 				</div>
 			</MkFolder>
 			<MkFolder v-if="$i && !$i.movedTo && $i.policies.canImportFollowing">
@@ -66,7 +66,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<MkSwitch v-model="withReplies">
 					{{ i18n.ts._exportOrImport.withReplies }}
 				</MkSwitch>
-				<MkButton primary :class="$style.button" inline @click="importFollowing($event)"><i class="ti ti-upload"></i> {{ i18n.ts.import }}</MkButton>
+				<MkButton primary :class="$style.button" :disabled="disableButtons" inline @click="importFollowing($event)"><i class="ti ti-upload"></i> {{ i18n.ts.import }}</MkButton>
 			</MkFolder>
 		</div>
 	</FormSection>
@@ -76,12 +76,12 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<MkFolder>
 				<template #label>{{ i18n.ts.export }}</template>
 				<template #icon><i class="ti ti-download"></i></template>
-				<MkButton primary :class="$style.button" inline @click="exportUserLists()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
+				<MkButton primary :class="$style.button" :disabled="disableButtons" inline @click="exportUserLists()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
 			</MkFolder>
 			<MkFolder v-if="$i && !$i.movedTo && $i.policies.canImportUserLists">
 				<template #label>{{ i18n.ts.import }}</template>
 				<template #icon><i class="ti ti-upload"></i></template>
-				<MkButton primary :class="$style.button" inline @click="importUserLists($event)"><i class="ti ti-upload"></i> {{ i18n.ts.import }}</MkButton>
+				<MkButton primary :class="$style.button" :disabled="disableButtons" inline @click="importUserLists($event)"><i class="ti ti-upload"></i> {{ i18n.ts.import }}</MkButton>
 			</MkFolder>
 		</div>
 	</FormSection>
@@ -91,12 +91,12 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<MkFolder>
 				<template #label>{{ i18n.ts.export }}</template>
 				<template #icon><i class="ti ti-download"></i></template>
-				<MkButton primary :class="$style.button" inline @click="exportMuting()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
+				<MkButton primary :class="$style.button" :disabled="disableButtons" inline @click="exportMuting()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
 			</MkFolder>
 			<MkFolder v-if="$i && !$i.movedTo && $i.policies.canImportMuting">
 				<template #label>{{ i18n.ts.import }}</template>
 				<template #icon><i class="ti ti-upload"></i></template>
-				<MkButton primary :class="$style.button" inline @click="importMuting($event)"><i class="ti ti-upload"></i> {{ i18n.ts.import }}</MkButton>
+				<MkButton primary :class="$style.button" :disabled="disableButtons" inline @click="importMuting($event)"><i class="ti ti-upload"></i> {{ i18n.ts.import }}</MkButton>
 			</MkFolder>
 		</div>
 	</FormSection>
@@ -106,12 +106,12 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<MkFolder>
 				<template #label>{{ i18n.ts.export }}</template>
 				<template #icon><i class="ti ti-download"></i></template>
-				<MkButton primary :class="$style.button" inline @click="exportBlocking()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
+				<MkButton primary :class="$style.button" :disabled="disableButtons" inline @click="exportBlocking()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
 			</MkFolder>
 			<MkFolder v-if="$i && !$i.movedTo && $i.policies.canImportBlocking">
 				<template #label>{{ i18n.ts.import }}</template>
 				<template #icon><i class="ti ti-upload"></i></template>
-				<MkButton primary :class="$style.button" inline @click="importBlocking($event)"><i class="ti ti-upload"></i> {{ i18n.ts.import }}</MkButton>
+				<MkButton primary :class="$style.button" :disabled="disableButtons" inline @click="importBlocking($event)"><i class="ti ti-upload"></i> {{ i18n.ts.import }}</MkButton>
 			</MkFolder>
 		</div>
 	</FormSection>
@@ -121,12 +121,12 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<MkFolder>
 				<template #label>{{ i18n.ts.export }}</template>
 				<template #icon><i class="ti ti-download"></i></template>
-				<MkButton primary :class="$style.button" inline @click="exportAntennas()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
+				<MkButton primary :class="$style.button" :disabled="disableButtons" inline @click="exportAntennas()"><i class="ti ti-download"></i> {{ i18n.ts.export }}</MkButton>
 			</MkFolder>
 			<MkFolder v-if="$i && !$i.movedTo && $i.policies.canImportAntennas">
 				<template #label>{{ i18n.ts.import }}</template>
 				<template #icon><i class="ti ti-upload"></i></template>
-				<MkButton primary :class="$style.button" inline @click="importAntennas($event)"><i class="ti ti-upload"></i> {{ i18n.ts.import }}</MkButton>
+				<MkButton primary :class="$style.button" :disabled="disableButtons" inline @click="importAntennas($event)"><i class="ti ti-upload"></i> {{ i18n.ts.import }}</MkButton>
 			</MkFolder>
 		</div>
 	</FormSection>
@@ -152,6 +152,7 @@ const excludeMutingUsers = ref(false);
 const excludeInactiveUsers = ref(false);
 const noteType = ref(null);
 const withReplies = ref(defaultStore.state.defaultWithReplies);
+const disableButtons = ref(false);
 
 const onExportSuccess = () => {
 	os.alert({
@@ -174,76 +175,110 @@ const onError = (ev) => {
 	});
 };
 
+// HACK: purely theatrical lockout delay when the file picker is opened, because we actually can't tell
+// if it was canceled, and file upload can take a while. this is stupid and gets in the user's way if
+// they accidentally cancel out, but it's better than them spamming the import button 50 times
+const tempDisable = () => {
+	disableButtons.value = true;
+	return setTimeout(() => { disableButtons.value = false; }, 10000);
+};
+
 const exportNotes = () => {
-	misskeyApi('i/export-notes', {}).then(onExportSuccess).catch(onError);
+	disableButtons.value = true;
+	misskeyApi('i/export-notes', {}).then(onExportSuccess).catch(onError).finally(() => { disableButtons.value = false; });
 };
 
 const exportFavorites = () => {
-	misskeyApi('i/export-favorites', {}).then(onExportSuccess).catch(onError);
+	disableButtons.value = true;
+	misskeyApi('i/export-favorites', {}).then(onExportSuccess).catch(onError).finally(() => { disableButtons.value = false; });
 };
 
 const exportClips = () => {
-	misskeyApi('i/export-clips', {}).then(onExportSuccess).catch(onError);
+	disableButtons.value = true;
+	misskeyApi('i/export-clips', {}).then(onExportSuccess).catch(onError).finally(() => { disableButtons.value = false; });
 };
 
 const exportFollowing = () => {
+	disableButtons.value = true;
 	misskeyApi('i/export-following', {
 		excludeMuting: excludeMutingUsers.value,
 		excludeInactive: excludeInactiveUsers.value,
 	})
-		.then(onExportSuccess).catch(onError);
+		.then(onExportSuccess).catch(onError).finally(() => { disableButtons.value = false; });
 };
 
 const exportBlocking = () => {
-	misskeyApi('i/export-blocking', {}).then(onExportSuccess).catch(onError);
+	disableButtons.value = true;
+	misskeyApi('i/export-blocking', {}).then(onExportSuccess).catch(onError).finally(() => { disableButtons.value = false; });
 };
 
 const exportUserLists = () => {
-	misskeyApi('i/export-user-lists', {}).then(onExportSuccess).catch(onError);
+	disableButtons.value = true;
+	misskeyApi('i/export-user-lists', {}).then(onExportSuccess).catch(onError).finally(() => { disableButtons.value = false; });
 };
 
 const exportMuting = () => {
-	misskeyApi('i/export-mute', {}).then(onExportSuccess).catch(onError);
+	disableButtons.value = true;
+	misskeyApi('i/export-mute', {}).then(onExportSuccess).catch(onError).finally(() => { disableButtons.value = false; });
 };
 
 const exportAntennas = () => {
-	misskeyApi('i/export-antennas', {}).then(onExportSuccess).catch(onError);
+	disableButtons.value = true;
+	misskeyApi('i/export-antennas', {}).then(onExportSuccess).catch(onError).finally(() => { disableButtons.value = false; });
 };
 
 const importFollowing = async (ev) => {
+	const timer = tempDisable();
 	const file = await selectFile(ev.currentTarget ?? ev.target);
+	clearTimeout(timer);
+	disableButtons.value = true;
 	misskeyApi('i/import-following', {
 		fileId: file.id,
 		withReplies: withReplies.value,
-	}).then(onImportSuccess).catch(onError);
+	}).then(onImportSuccess).catch(onError).finally(() => { disableButtons.value = false; });
 };
 
 const importNotes = async (ev) => {
+	const timer = tempDisable();
 	const file = await selectFile(ev.currentTarget ?? ev.target);
+	clearTimeout(timer);
+	disableButtons.value = true;
 	misskeyApi('i/import-notes', {
 		fileId: file.id,
 		type: noteType.value,
-	}).then(onImportSuccess).catch(onError);
+	}).then(onImportSuccess).catch(onError).finally(() => { disableButtons.value = false; });
 };
 
 const importUserLists = async (ev) => {
+	const timer = tempDisable();
 	const file = await selectFile(ev.currentTarget ?? ev.target);
-	misskeyApi('i/import-user-lists', { fileId: file.id }).then(onImportSuccess).catch(onError);
+	clearTimeout(timer);
+	disableButtons.value = true;
+	misskeyApi('i/import-user-lists', { fileId: file.id }).then(onImportSuccess).catch(onError).finally(() => { disableButtons.value = false; });
 };
 
 const importMuting = async (ev) => {
+	const timer = tempDisable();
 	const file = await selectFile(ev.currentTarget ?? ev.target);
-	misskeyApi('i/import-muting', { fileId: file.id }).then(onImportSuccess).catch(onError);
+	clearTimeout(timer);
+	disableButtons.value = true;
+	misskeyApi('i/import-muting', { fileId: file.id }).then(onImportSuccess).catch(onError).finally(() => { disableButtons.value = false; });
 };
 
 const importBlocking = async (ev) => {
+	const timer = tempDisable();
 	const file = await selectFile(ev.currentTarget ?? ev.target);
-	misskeyApi('i/import-blocking', { fileId: file.id }).then(onImportSuccess).catch(onError);
+	clearTimeout(timer);
+	disableButtons.value = true;
+	misskeyApi('i/import-blocking', { fileId: file.id }).then(onImportSuccess).catch(onError).finally(() => { disableButtons.value = false; });
 };
 
 const importAntennas = async (ev) => {
+	const timer = tempDisable();
 	const file = await selectFile(ev.currentTarget ?? ev.target);
-	misskeyApi('i/import-antennas', { fileId: file.id }).then(onImportSuccess).catch(onError);
+	clearTimeout(timer);
+	disableButtons.value = true;
+	misskeyApi('i/import-antennas', { fileId: file.id }).then(onImportSuccess).catch(onError).finally(() => { disableButtons.value = false; });
 };
 
 const headerActions = computed(() => []);