| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | domain name | Japan | Domain names are also commonly used but there is a preference for domain names that include specific keywords related to the website's content or purpose. | 1 |
| 2 | principal ideal domain | Japan | The concept of principal ideal domain may not be widely known outside of academic and mathematical circles. | 1 |
| 3 | principal ideal domain | Japan | Less emphasized in mathematics education and considered a relatively advanced concept in abstract algebra. | 1 |