diff --git a/src/store/setting.ts b/src/store/setting.ts
index 2d149560cd..ba9c53548d 100644
--- a/src/store/setting.ts
+++ b/src/store/setting.ts
@@ -18,6 +18,7 @@ import {
 import { IsEqual } from "@/type/utility";
 
 export const settingStoreState: SettingStoreState = {
+  openedEditor: undefined,
   savingSetting: {
     fileEncoding: "UTF-8",
     fileNamePattern: "",
@@ -71,7 +72,6 @@ export const settingStoreState: SettingStoreState = {
   },
   showSingCharacterPortrait: true,
   playheadPositionDisplayFormat: "MINUTES_SECONDS",
-  openedEditor: "talk",
 };
 
 export const settingStore = createPartialStore<SettingStoreTypes>({
diff --git a/src/store/type.ts b/src/store/type.ts
index cfe438912f..fae93613da 100644
--- a/src/store/type.ts
+++ b/src/store/type.ts
@@ -1825,7 +1825,9 @@ export type SettingStoreState = {
   experimentalSetting: ExperimentalSettingType;
   confirmedTips: ConfirmedTips;
   engineSettings: EngineSettings;
-} & RootMiscSettingType;
+} & Omit<RootMiscSettingType, "openedEditor"> & {
+    openedEditor: EditorType | undefined; // undefinedのときはどのエディタを開くか定まっていない
+  };
 
 // keyとvalueの型を連動するようにしたPayloadを作る
 type KeyValuePayload<R, K extends keyof R = keyof R> = K extends keyof R
diff --git a/src/type/preload.ts b/src/type/preload.ts
index 11faf381ec..8ded07113e 100644
--- a/src/type/preload.ts
+++ b/src/type/preload.ts
@@ -571,6 +571,7 @@ export type ConfirmedTips = {
 
 // ルート直下にある雑多な設定値
 export const rootMiscSettingSchema = z.object({
+  openedEditor: z.enum(["talk", "song"]).default("talk"),
   editorFont: z.enum(["default", "os"]).default("default"),
   showTextLineNumber: z.boolean().default(false),
   showAddAudioItemButton: z.boolean().default(true),
@@ -594,7 +595,6 @@ export const rootMiscSettingSchema = z.object({
   playheadPositionDisplayFormat: z
     .enum(["MINUTES_SECONDS", "MEASURES_BEATS"])
     .default("MINUTES_SECONDS"), // 再生ヘッド位置の表示モード
-  openedEditor: z.enum(["talk", "song"]).default("talk"),
 });
 export type RootMiscSettingType = z.infer<typeof rootMiscSettingSchema>;