• Nippon Telegraph And Telephone average return on investment for 2023 was 9.2, a 4.55% decline from 2022.
• Nippon Telegraph And Telephone average return on investment for 2022 was 8.8, a 16.87% increase from 2021.
• Nippon Telegraph And Telephone average return on investment for 2021 was 7.53, a 18.58% increase from 2020.

Roi - return on investment can be defined as an indicator of how profitable a company is relative to its assets invested by shareholders and long-term bond holders. Calculated by dividing a company's operating earnings by its long-term debt and shareholders equity.