Canada did impose tariffs on imported bikes just like the US did to protect domestic makers from an influx of cheap asian and European bicycles and this also affected the prices of upper end bicycles like Raleigh.
Raleigh started producing bikes here in 1978 and Sekine started production here because of the North American demand being so high and to reduce their shipping costs on what were massive numbers of bicycles.
The quality of Sekine bicycles can be very good and they were manufactured in Manitoba.