Santacas, AKA japones (as in Japanese) are a thin-skinned, straight-ahead hot chile. To prepare; wash, remove stem and seeds, toast very lightly (over-roasting will burn the chile and make it bitter) by tossing in a dry skillet until slightly puffed, then soak in hot water for about 20 minutes. Use in soups, sauces, stews, rice and bean dishes, chile con carne, etc.