Scotch enthusiasts found it hard to swallow recently when a Japanese single malt was named the world's best whisky, external. But the fact that a Scot played a key role in establishing the hard stuff in Japan may make that news more palatable for some. Jessie Roberta Cowan, from Kirkintilloch, had little idea how much her life was going to change when a young Japanese man took up lodgings at her f