Train stations and airports were bustling with travelers returning from trips Monday, the last day of Japan’s Golden Week holidays, with people experiencing the first spring holiday period completely unaffected by coronavirus-related travel restrictions in four years. Despite higher costs resulting from the yen’s sharp decline against other currencies, many travelers opted for overseas destinations nearly a year after the government downgraded COVID-19 to a lower-risk disease category. Shinkansen bullet trains reached peak congestion Monday as carriages with unreserved seats were overcrowded, …