Chrome has default font fallbacks set up on a per-script, per-OS basis. See for example https://chromium.googlesource.com/chromium/src/+/master/chrome/app/resources/locale_settings_mac.grd#160, which is the default font for characters in the Japanese-language script.

Electron does not set up these font fallbacks, and as a result, font rendering in those scripts does not match that of Chrome. Further, it's impossible to set it up on the app side to use the appropriate font fallbacks, because of #15480.
atom/browser/atom_browser_client.cc
AtomBrowserClient::GetDevToolsManagerDelegate() {
  return new DevToolsManagerDelegate;
}
NotificationPresenter* AtomBrowserClient::GetNotificationPresenter() {
  if (!notification_presenter_) {
    notification_presenter_.reset(NotificationPresenter::Create());
  }
  return notification_presenter_.get();
}
content::PlatformNotificationService*
AtomBrowserClient::GetPlatformNotificationService() {
  if (!notification_service_) {
    notification_service_.reset(new PlatformNotificationService(this));
  }
  return notification_service_.get();
}
base::FilePath AtomBrowserClient::GetDefaultDownloadDirectory() {
  
  base::FilePath path;
  if (base::PathService::Get(base::DIR_HOME, &path))
    path = path.Append(FILE_PATH_LITERAL("Downloads"));
  return path;
}
std::string AtomBrowserClient::GetApplicationLocale() {
  if (BrowserThread::CurrentlyOn(BrowserThread::IO))
    return g_io_thread_application_locale.Get();
  return *g_application_locale;
}
}