diff --git a/packages/frontend/src/components/MkChannelList.vue b/packages/frontend/src/components/MkChannelList.vue
index 394dcb6bd1..23bb32c6b9 100644
--- a/packages/frontend/src/components/MkChannelList.vue
+++ b/packages/frontend/src/components/MkChannelList.vue
@@ -13,17 +13,16 @@ SPDX-License-Identifier: AGPL-3.0-only
 </MkPagination>
 </template>
 
-<script lang="ts" setup>
+<script lang="ts" setup generic="P extends IPaginator">
 import * as Misskey from 'misskey-js';
-import type { IPaginator } from '@/utility/paginator.js';
+import type { IPaginator, ExtractorFunction } from '@/utility/paginator.js';
 import MkChannelPreview from '@/components/MkChannelPreview.vue';
 import MkPagination from '@/components/MkPagination.vue';
-import { i18n } from '@/i18n.js';
 
 const props = withDefaults(defineProps<{
-	paginator: IPaginator;
+	paginator: P;
 	noGap?: boolean;
-	extractor?: (item: any) => Misskey.entities.Channel;
+	extractor?: ExtractorFunction<P, Misskey.entities.Channel>;
 }>(), {
 	extractor: (item) => item,
 });
diff --git a/packages/frontend/src/components/MkUserList.vue b/packages/frontend/src/components/MkUserList.vue
index e3469d0fd7..f47d9b56dc 100644
--- a/packages/frontend/src/components/MkUserList.vue
+++ b/packages/frontend/src/components/MkUserList.vue
@@ -15,17 +15,17 @@ SPDX-License-Identifier: AGPL-3.0-only
 </MkPagination>
 </template>
 
-<script lang="ts" setup>
+<script lang="ts" setup generic="P extends IPaginator">
 import * as Misskey from 'misskey-js';
-import type { IPaginator } from '@/utility/paginator.js';
+import type { IPaginator, ExtractorFunction } from '@/utility/paginator.js';
 import MkUserInfo from '@/components/MkUserInfo.vue';
 import MkPagination from '@/components/MkPagination.vue';
 import { i18n } from '@/i18n.js';
 
 const props = withDefaults(defineProps<{
-	paginator: IPaginator;
+	paginator: P;
 	noGap?: boolean;
-	extractor?: (item: any) => Misskey.entities.UserDetailed;
+	extractor?: ExtractorFunction<P, Misskey.entities.UserDetailed>;
 }>(), {
 	extractor: (item) => item,
 });
diff --git a/packages/frontend/src/composables/use-form.ts b/packages/frontend/src/composables/use-form.ts
index 1c93557413..38e9b40e20 100644
--- a/packages/frontend/src/composables/use-form.ts
+++ b/packages/frontend/src/composables/use-form.ts
@@ -19,10 +19,13 @@ export function useForm<T extends Record<string, any>>(initialState: T, save: (n
 	const currentState = reactive<T>(copy(initialState));
 	const previousState = reactive<T>(copy(initialState));
 
-	const modifiedStates = reactive<Record<keyof T, boolean>>({} as any);
-	for (const key in currentState) {
-		modifiedStates[key] = false;
-	}
+	const modifiedStates = reactive<Record<keyof T, boolean>>((() => {
+		const obj: Record<keyof T, boolean> = {} as Record<keyof T, boolean>;
+		for (const key in initialState) {
+			obj[key] = false;
+		}
+		return obj;
+	})());
 	const modified = computed(() => Object.values(modifiedStates).some(v => v));
 	const modifiedCount = computed(() => Object.values(modifiedStates).filter(v => v).length);
 
diff --git a/packages/frontend/src/di.ts b/packages/frontend/src/di.ts
index e2590da60b..f09782ea38 100644
--- a/packages/frontend/src/di.ts
+++ b/packages/frontend/src/di.ts
@@ -4,13 +4,14 @@
  */
 
 import type { InjectionKey, Ref } from 'vue';
+import type { PageMetadata } from '@/page.js';
 import type { Router } from '@/router.js';
 
 export const DI = {
 	routerCurrentDepth: Symbol() as InjectionKey<number>,
 	router: Symbol() as InjectionKey<Router>,
 	mock: Symbol() as InjectionKey<boolean>,
-	pageMetadata: Symbol() as InjectionKey<Ref<Record<string, any> | null>>,
+	pageMetadata: Symbol() as InjectionKey<Ref<PageMetadata | null>>,
 	viewId: Symbol() as InjectionKey<string>,
 	currentStickyTop: Symbol() as InjectionKey<Ref<number>>,
 	currentStickyBottom: Symbol() as InjectionKey<Ref<number>>,
diff --git a/packages/frontend/src/directives/adaptive-border.ts b/packages/frontend/src/directives/adaptive-border.ts
index 749861fd94..2bfd22f6b9 100644
--- a/packages/frontend/src/directives/adaptive-border.ts
+++ b/packages/frontend/src/directives/adaptive-border.ts
@@ -7,7 +7,7 @@ import type { Directive } from 'vue';
 import { getBgColor } from '@/utility/get-bg-color.js';
 import { globalEvents } from '@/events.js';
 
-const handlerMap = new WeakMap<any, any>();
+const handlerMap = new WeakMap<HTMLElement, () => void>();
 
 export const adaptiveBorderDirective = {
 	mounted(src) {
diff --git a/packages/frontend/src/directives/user-preview.ts b/packages/frontend/src/directives/user-preview.ts
index f81f5dbef8..d68999d8ef 100644
--- a/packages/frontend/src/directives/user-preview.ts
+++ b/packages/frontend/src/directives/user-preview.ts
@@ -119,9 +119,9 @@ export const userPreviewDirective = {
 
 		// TODO: 新たにプロパティを作るのをやめMapを使う
 		// ただメモリ的には↓の方が省メモリかもしれないので検討中
-		const self = (el as any)._userPreviewDirective_ = {} as any;
-
-		self.preview = new UserPreview(el, binding.value);
+		el._userPreviewDirective_ = {
+			preview: new UserPreview(el, binding.value),
+		};
 	},
 
 	unmounted(el, binding) {
diff --git a/packages/frontend/src/lib/pizzax.ts b/packages/frontend/src/lib/pizzax.ts
index 8faac6155c..80543d10e4 100644
--- a/packages/frontend/src/lib/pizzax.ts
+++ b/packages/frontend/src/lib/pizzax.ts
@@ -59,7 +59,7 @@ export class Pizzax<T extends StateDef> {
 	private pizzaxChannel: BroadcastChannel<PizzaxChannelMessage<T>>;
 
 	// 簡易的にキューイングして占有ロックとする
-	private currentIdbJob: Promise<any> = Promise.resolve();
+	private currentIdbJob: Promise<unknown> = Promise.resolve();
 	private addIdbSetJob<T>(job: () => Promise<T>) {
 		const promise = this.currentIdbJob.then(job, err => {
 			console.error('Pizzax failed to save data to idb!', err);
diff --git a/packages/frontend/src/pages/admin-user.vue b/packages/frontend/src/pages/admin-user.vue
index 6d3cc9c1b7..22e377c75d 100644
--- a/packages/frontend/src/pages/admin-user.vue
+++ b/packages/frontend/src/pages/admin-user.vue
@@ -257,7 +257,7 @@ const {
 const user = ref(result.user);
 const info = ref(result.info);
 const ips = ref(result.ips);
-const ap = ref<any>(null);
+const ap = ref<Misskey.entities.ApGetResponse | null>(null);
 const moderator = ref(info.value.isModerator);
 const silenced = ref(info.value.isSilenced);
 const suspended = ref(info.value.isSuspended);
diff --git a/packages/frontend/src/pages/admin/relays.vue b/packages/frontend/src/pages/admin/relays.vue
index 9eba68022a..3526e036d3 100644
--- a/packages/frontend/src/pages/admin/relays.vue
+++ b/packages/frontend/src/pages/admin/relays.vue
@@ -44,7 +44,7 @@ async function addRelay() {
 	if (canceled || inbox == null) return;
 	misskeyApi('admin/relays/add', {
 		inbox,
-	}).then((relay: any) => {
+	}).then(() => {
 		refresh();
 	}).catch((err: any) => {
 		os.alert({
diff --git a/packages/frontend/src/pages/install-extensions.vue b/packages/frontend/src/pages/install-extensions.vue
index cad3b2a00a..2405f82bc4 100644
--- a/packages/frontend/src/pages/install-extensions.vue
+++ b/packages/frontend/src/pages/install-extensions.vue
@@ -161,7 +161,11 @@ async function _fetch_() {
 					},
 					raw: res.data,
 				};
-			} catch (err: any) {
+			} catch (err) {
+				if (!(err instanceof Error)) {
+					throw err;
+				}
+
 				switch (err.message.toLowerCase()) {
 					case 'this theme is already installed':
 						errorKV.value = {
diff --git a/packages/frontend/src/stream.ts b/packages/frontend/src/stream.ts
index 25544d9d88..adbde3fee2 100644
--- a/packages/frontend/src/stream.ts
+++ b/packages/frontend/src/stream.ts
@@ -7,8 +7,6 @@ import * as Misskey from 'misskey-js';
 import { markRaw } from 'vue';
 import { $i } from '@/i.js';
 import { wsOrigin } from '@@/js/config.js';
-// TODO: No WebsocketモードでStreamMockが使えそう
-//import { StreamMock } from '@/utility/stream-mock.js';
 
 // heart beat interval in ms
 const HEART_BEAT_INTERVAL = 1000 * 60;
diff --git a/packages/frontend/src/utility/drive.ts b/packages/frontend/src/utility/drive.ts
index fb2825e7f7..64079d125a 100644
--- a/packages/frontend/src/utility/drive.ts
+++ b/packages/frontend/src/utility/drive.ts
@@ -124,7 +124,7 @@ export function uploadFile(file: File | Blob, options: {
 			const driveFile = JSON.parse(ev.target.response);
 			globalEvents.emit('driveFileCreated', driveFile);
 			resolve(driveFile);
-		}) as (ev: ProgressEvent<EventTarget>) => any;
+		}) as (ev: ProgressEvent<EventTarget>) => void;
 
 		if (options.onProgress) {
 			xhr.upload.onprogress = ev => {
diff --git a/packages/frontend/src/utility/image-effector/ImageEffector.ts b/packages/frontend/src/utility/image-effector/ImageEffector.ts
index 9d5b961416..10d9d2e6bc 100644
--- a/packages/frontend/src/utility/image-effector/ImageEffector.ts
+++ b/packages/frontend/src/utility/image-effector/ImageEffector.ts
@@ -13,7 +13,7 @@ interface CommonParamDef {
 	type: string;
 	label?: string;
 	caption?: string;
-	default: any;
+	default: unknown;
 }
 
 interface NumberParamDef extends CommonParamDef {
diff --git a/packages/frontend/src/utility/paginator.ts b/packages/frontend/src/utility/paginator.ts
index 7db55db7d6..59ae1e431a 100644
--- a/packages/frontend/src/utility/paginator.ts
+++ b/packages/frontend/src/utility/paginator.ts
@@ -5,7 +5,7 @@
 
 import { ref, shallowRef, triggerRef } from 'vue';
 import * as Misskey from 'misskey-js';
-import type { ComputedRef, Ref, ShallowRef } from 'vue';
+import type { ComputedRef, Ref, ShallowRef, UnwrapRef } from 'vue';
 import { misskeyApi } from '@/utility/misskey-api.js';
 
 const MAX_ITEMS = 30;
@@ -19,7 +19,12 @@ export type MisskeyEntity = {
 	_shouldInsertAd_?: boolean;
 };
 
-type FilterByEpRes<E extends Record<string, any>> = {
+type AbsEndpointType = {
+	req: unknown;
+	res: unknown;
+};
+
+type FilterByEpRes<E extends Record<string, AbsEndpointType>> = {
 	[K in keyof E]: E[K]['res'] extends Array<{ id: string }> ? K : never
 }[keyof E];
 export type PaginatorCompatibleEndpointPaths = FilterByEpRes<Misskey.Endpoints>;
@@ -27,6 +32,8 @@ export type PaginatorCompatibleEndpoints = {
 	[K in PaginatorCompatibleEndpointPaths]: Misskey.Endpoints[K];
 };
 
+export type ExtractorFunction<P extends IPaginator, T> = (item: UnwrapRef<P['items']>[number]) => T;
+
 export interface IPaginator<T = unknown, _T = T & MisskeyEntity> {
 	/**
 	 * 外部から直接操作しないでください
diff --git a/packages/frontend/src/utility/stream-mock.ts b/packages/frontend/src/utility/stream-mock.ts
deleted file mode 100644
index 9b1b368de4..0000000000
--- a/packages/frontend/src/utility/stream-mock.ts
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and misskey-project
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-import { EventEmitter } from 'eventemitter3';
-import * as Misskey from 'misskey-js';
-import type { Channels, StreamEvents, IStream, IChannelConnection } from 'misskey-js';
-
-type AnyOf<T extends Record<any, any>> = T[keyof T];
-type OmitFirst<T extends any[]> = T extends [any, ...infer R] ? R : never;
-
-/**
- * Websocket無効化時に使うStreamのモック（なにもしない）
- */
-export class StreamMock extends EventEmitter<StreamEvents> implements IStream {
-	public readonly state = 'initializing';
-
-	constructor(...args: ConstructorParameters<typeof Misskey.Stream>) {
-		super();
-		// do nothing
-	}
-
-	public useChannel<C extends keyof Channels>(channel: C, params?: Channels[C]['params'], name?: string): ChannelConnectionMock<Channels[C]> {
-		return new ChannelConnectionMock(this, channel, name);
-	}
-
-	public removeSharedConnection(connection: any): void {
-		// do nothing
-	}
-
-	public removeSharedConnectionPool(pool: any): void {
-		// do nothing
-	}
-
-	public disconnectToChannel(): void {
-		// do nothing
-	}
-
-	public send(typeOrPayload: string): void;
-	public send(typeOrPayload: string, payload: any): void;
-	public send(typeOrPayload: Record<string, any> | any[]): void;
-	public send(typeOrPayload: string | Record<string, any> | any[], payload?: any): void {
-		// do nothing
-	}
-
-	public ping(): void {
-		// do nothing
-	}
-
-	public heartbeat(): void {
-		// do nothing
-	}
-
-	public close(): void {
-		// do nothing
-	}
-}
-
-class ChannelConnectionMock<Channel extends AnyOf<Channels> = any> extends EventEmitter<Channel['events']> implements IChannelConnection<Channel> {
-	public id = '';
-	public name?: string; // for debug
-	public inCount = 0; // for debug
-	public outCount = 0; // for debug
-	public channel: string;
-
-	constructor(stream: IStream, ...args: OmitFirst<ConstructorParameters<typeof Misskey.ChannelConnection<Channel>>>) {
-		super();
-
-		this.channel = args[0];
-		this.name = args[1];
-	}
-
-	public send<T extends keyof Channel['receives']>(type: T, body: Channel['receives'][T]): void {
-		// do nothing
-	}
-
-	public dispose(): void {
-		// do nothing
-	}
-}
diff --git a/packages/frontend/src/utility/watermark/WatermarkRenderer.ts b/packages/frontend/src/utility/watermark/WatermarkRenderer.ts
index 766d45148a..32341a9e10 100644
--- a/packages/frontend/src/utility/watermark/WatermarkRenderer.ts
+++ b/packages/frontend/src/utility/watermark/WatermarkRenderer.ts
@@ -222,7 +222,8 @@ export class WatermarkRenderer {
 					},
 				});
 			} else {
-				throw new Error(`Unrecognized layer type: ${(layer as any).type}`);
+				// @ts-expect-error Should be unreachable
+				throw new Error(`Unrecognized layer type: ${layer.type}`);
 			}
 		}