. >> she's the daughter of a fourth generation wine producer in yamanashi prefecture. wines from the region were previously not regarded as authentic fine wine, but with a lot of work, she's helped to change that. >> translator: our product was called second rate, and for a long time we didn't do anything about it. the producers didn't realize the true potential of their crop. so i decided to make grapes that were deeper and richer and which would mature over time. >> yamanashi prefecture is a major grape producer in japan. for years farmers there have grown a local species called koshu, mainly for eating. with extra care and effort, mizawa has made it suitable for fine wine. >> translator: i was born into a family that really treasures koshu grapes. i grew up with them. for other winemakers, it's just another variety, one of many species of grape. but for me, it's truly precious. >> reporter: she studied authentic winemaking at bordeaux university in france. there she learned the methods of cultivation that are needed to make a bottle of fine wine. >> translator: i le