The winery is located in the city of Katsunuma in the Yamanashi district west of Tokyo(Japan). The predecessor of the company is the Dainihon Yamanashi Wine Company, founded in 1877. The current owner is Tadao Suzuki. The property includes the Markham Vineyards in Napa Valley, California (since 1987) and Château Reysson in Médoc, France (since 1988). Whisky and potato spirit are also produced in Japan. The vineyards cover 100 hectares in the Hokushin, Jyonohira, Kikyogahara, Niitsuru and Toriibira vineyards in the Fukushima, Nagano and Yamanashi districts. They are planted with Cabernet Sauvignon, Chardonnay, Koshu, Merlot, Muscat Bailey A and Riesling. The three main wine lines are called Private Reserve (top range of pure varietal wines), District (grapes from all areas) and J-Five (blends of Japanese and European varieties). In 1997 the "Château Mercian Jyonohira Cabernet-Sauvignon 1990" was the first Japanese wine to be awarded a gold medal at an international wine competition in Bordeaux.