• Nippon Telegraph And Telephone average operating margin for 2023 was 16.66%, a 2.86% decline from 2022.
• Nippon Telegraph And Telephone average operating margin for 2022 was 17.15%, a 10.15% decline from 2021.
• Nippon Telegraph And Telephone average operating margin for 2021 was 15.57%, a 9.88% increase from 2020.

Operating margin can be defined as operating margin measurement of what proportion of a company's revenue is left over after paying for variable costs of production such as wages, raw materials, etc.