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
#endif
#include <memory>
#include <utility>
#include "atom/browser/api/atom_api_app.h"
#include "atom/browser/api/atom_api_protocol.h"
#include "atom/browser/api/atom_api_web_contents.h"
#include "atom/browser/atom_browser_context.h"
#include "atom/browser/atom_browser_main_parts.h"
#include "atom/browser/atom_navigation_throttle.h"
#include "atom/browser/atom_quota_permission_context.h"
#include "atom/browser/atom_resource_dispatcher_host_delegate.h"
#include "atom/browser/atom_speech_recognition_manager_delegate.h"
#include "atom/browser/child_web_contents_tracker.h"
#include "atom/browser/io_thread.h"
#include "atom/browser/media/media_capture_devices_dispatcher.h"
#include "atom/browser/native_window.h"
#include "atom/browser/notifications/notification_presenter.h"
#include "atom/browser/notifications/platform_notification_service.h"
#include "atom/browser/session_preferences.h"
#include "atom/browser/ui/devtools_manager_delegate.h"
#include "atom/browser/web_contents_permission_helper.h"
#include "atom/browser/web_contents_preferences.h"
#include "atom/browser/window_list.h"
#include "atom/common/options_switches.h"
#include "atom/common/platform_util.h"
#include "base/command_line.h"
#include "base/environment.h"
#include "base/files/file_util.h"
#include "base/json/json_reader.h"
#include "base/lazy_instance.h"