The Koshu white wine grape ... and sugar level and adjusting the strength of astringency.” The grayish pink grape has been used to make white wine in Yamanashi Prefecture since the Meiji ...

However, the celebrated pink-skinned grapes aren't considered true wine grapes. Wine made from Koshu grapes can be bitter and ...

are the only Japanese wine producers to have previously won the Platinum medal. L’Orient Katsunuma Koshu was brewed together with grape lees to bring out a citrusy aroma and savory grape flavor.