Oh, and the Japanese (and American & Canadian) versions of “Whisky” are required by international trademark agreement to be spelled “Whiskey”. Even if the method of distilling and aging (in used American fired oak Bourbon barrels) is the same and they’re informally calling it Scotch.
Only Irish and American products are actually spelled whiskey, and in at least the American case, that's not even universal. Pretty much everywhere else in the world (including Scotland, Canada, and Japan), it's spelled whisky.