In a tiny Tokyo restaurant filled with the smell of Nepalese dumplings, Budhathoki Samjhana surveys the business she built from scratch but may now have to give up as Japan tightens visa rules.Even though Japan has a rapidly ageing population and is suffering labour shortages in many sectors, opposition to immigration is growing and the new rules for business manager visas were introduced by the ruling Liberal Democratic Party in late 2025.Nepalese national Budhathoki, who spent a decade away...