Ethics are universal. Ethics is that which you want others to follow as well. For example, ethics are exactly those things which you expect from others who are working under you, or are working above you. You don’t want your boss to be unethical or those below you to be unethical towards you.
When you expect a certain standard of behavior, an etiquette, integrity from people working around you, you too will not do the same things to someone else. This is common.
You don’t want your employee to lie to you. Do you like them to lie to you? No. You too follow this in your life. This is ethics. As simple as that.
Ethics is universal. There is no Japanese lie, Indian lie, or American lie. A lie is a lie. Integrity is integrity. In this sense, ethics is universal.