diff --git a/azooKeyMac/AppDelegate.swift b/azooKeyMac/AppDelegate.swift
index 4b7133f2..8f6ed9e2 100644
--- a/azooKeyMac/AppDelegate.swift
+++ b/azooKeyMac/AppDelegate.swift
@@ -84,6 +84,11 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         self.server = IMKServer(name: Bundle.main.infoDictionary?["InputMethodConnectionName"] as? String, bundleIdentifier: Bundle.main.bundleIdentifier)
         NSLog("tried connection")
 
+        // Keychainから設定値を非同期で読み込み
+        Task {
+            await Config.OpenAiApiKey.loadFromKeychain()
+        }
+
         // Check if mainMenu exists, or create it
         if NSApp.mainMenu == nil {
             NSApp.mainMenu = NSMenu()
diff --git a/azooKeyMac/Configs/StringConfigItem.swift b/azooKeyMac/Configs/StringConfigItem.swift
index 37ecd3f8..2df19373 100644
--- a/azooKeyMac/Configs/StringConfigItem.swift
+++ b/azooKeyMac/Configs/StringConfigItem.swift
@@ -24,15 +24,33 @@ extension Config {
     struct OpenAiApiKey: StringConfigItem {
         static var key: String = "dev.ensan.inputmethod.azooKeyMac.preference.OpenAiApiKey"
 
+        private static var cachedValue: String = ""
+        private static var isLoaded: Bool = false
+
         // keychainで保存
         var value: String {
             get {
-                KeychainHelper.read(key: Self.key) ?? ""
+                if !Self.isLoaded {
+                    Task {
+                        Self.cachedValue = await KeychainHelper.read(key: Self.key) ?? ""
+                        Self.isLoaded = true
+                    }
+                }
+                return Self.cachedValue
             }
             nonmutating set {
-                KeychainHelper.save(key: Self.key, value: newValue)
+                Self.cachedValue = newValue
+                Task {
+                    await KeychainHelper.save(key: Self.key, value: newValue)
+                }
             }
         }
+
+        // 初期化時にKeychainから値を読み込む
+        static func loadFromKeychain() async {
+            cachedValue = await KeychainHelper.read(key: key) ?? ""
+            isLoaded = true
+        }
     }
 }
 
diff --git a/azooKeyMac/Extensions/KeychainHelper.swift b/azooKeyMac/Extensions/KeychainHelper.swift
index dbac537b..4d5e1c77 100644
--- a/azooKeyMac/Extensions/KeychainHelper.swift
+++ b/azooKeyMac/Extensions/KeychainHelper.swift
@@ -2,49 +2,64 @@ import Foundation
 import Security
 
 enum KeychainHelper {
-    static func save(key: String, value: String) {
-        guard let data = value.data(using: .utf8) else {
-            print("StringをDataに変換する際にエラーが発生しました")
-            return
-        }
+    static func save(key: String, value: String) async {
+        await withCheckedContinuation { continuation in
+            Task.detached {
+                guard let data = value.data(using: .utf8) else {
+                    print("StringをDataに変換する際にエラーが発生しました")
+                    continuation.resume()
+                    return
+                }
 
-        let query: [String: Any] = [
-            kSecClass as String: kSecClassGenericPassword,
-            kSecAttrAccount as String: key,
-            kSecValueData as String: data
-        ]
+                let query: [String: Any] = [
+                    kSecClass as String: kSecClassGenericPassword,
+                    kSecAttrAccount as String: key,
+                    kSecValueData as String: data
+                ]
 
-        // 既存のデータがあれば削除
-        SecItemDelete(query as CFDictionary)
+                // 既存のデータがあれば削除
+                SecItemDelete(query as CFDictionary)
 
-        // 新しいデータを追加
-        SecItemAdd(query as CFDictionary, nil)
+                // 新しいデータを追加
+                SecItemAdd(query as CFDictionary, nil)
+                continuation.resume()
+            }
+        }
     }
 
-    static func read(key: String) -> String? {
-        let query: [String: Any] = [
-            kSecClass as String: kSecClassGenericPassword,
-            kSecAttrAccount as String: key,
-            kSecReturnData as String: kCFBooleanTrue!,
-            kSecMatchLimit as String: kSecMatchLimitOne
-        ]
+    static func read(key: String) async -> String? {
+        await withCheckedContinuation { continuation in
+            Task.detached {
+                let query: [String: Any] = [
+                    kSecClass as String: kSecClassGenericPassword,
+                    kSecAttrAccount as String: key,
+                    kSecReturnData as String: kCFBooleanTrue!,
+                    kSecMatchLimit as String: kSecMatchLimitOne
+                ]
 
-        var dataTypeRef: AnyObject?
-        let status = SecItemCopyMatching(query as CFDictionary, &dataTypeRef)
+                var dataTypeRef: AnyObject?
+                let status = SecItemCopyMatching(query as CFDictionary, &dataTypeRef)
 
-        if status == errSecSuccess, let data = dataTypeRef as? Data {
-            return String(bytes: data, encoding: .utf8)
+                if status == errSecSuccess, let data = dataTypeRef as? Data {
+                    continuation.resume(returning: String(bytes: data, encoding: .utf8))
+                } else {
+                    continuation.resume(returning: nil)
+                }
+            }
         }
-
-        return nil
     }
 
-    static func delete(key: String) {
-        let query: [String: Any] = [
-            kSecClass as String: kSecClassGenericPassword,
-            kSecAttrAccount as String: key
-        ]
+    static func delete(key: String) async {
+        await withCheckedContinuation { continuation in
+            Task.detached {
+                let query: [String: Any] = [
+                    kSecClass as String: kSecClassGenericPassword,
+                    kSecAttrAccount as String: key
+                ]
 
-        SecItemDelete(query as CFDictionary)
+                SecItemDelete(query as CFDictionary)
+                continuation.resume()
+            }
+        }
     }
 }