Japan itself is the primary user of its own standard steel profiles, driven by domestic industries' strict quality requirements. Southeast Asian countries, such as Singapore and South Korea, also import Japanese profiles for high - end construction and manufacturing projects, valuing their quality and technical support. In the Middle East, Japanese steel is used in luxury and high - tech construction due to its reputation for excellence.
Chinese standard steel profiles have a large user base in China due to local production and cost - effectiveness. Neighboring Asian countries, like Vietnam and Thailand, frequently use GB profiles in infrastructure development under the Belt and Road Initiative. In Africa and South America, Chinese steel is popular for large - scale public projects, as its affordability and availability match the regions' development needs.