Tucked within the mountains of Japan’s Gifu prefecture, in the middle of Takayama, lies Funasaka Sake Brewery. With its dark-wood walls and stacked sake barrels, it looks typical. But inside is a surprise: Funasaka sells top-notch kosher sake. Less than one percent of the Japanese population identifies as Jewish, but according to Hiroki Arisu, the brewery’s 35-year-old president and CEO, the land-locked prefecture welcomes more than 10,000 Israeli travelers annually—an impressive number given Takayama is home to fewer than 90,000 residents. So why do so many Israelis visit the modestly…