Last month I witnessed the opening of spanking new winery buildings at an estate in the Rheingau that attracted 600 guests from all over the world and included every luminary of German wine. But the most extraordinary aspect of the celebrations was that there was not a Japanese face in sight. German wine has long been relatively popular in Japan but that is not why I was surprised. Weingut Robert Weil has been owned by the Japanese whisky giant Suntory since 1988, yet you would never know it.

There was no mention of the connection in any of the literature handed out at the event. The Suntory website acknowledges its three subsidiaries in the European wine business but directs you firmly to Robert Weil’s own website on which there is not a mention of Suntory or Japan. Yet in the words of the president of the Rheingau wine growers association, Stefan Ress of the Weingut Balthasar Ress in the next village, “What an opportunity was given to the Rheingau by Suntory’s investment in Weil. Nothing better could have happened to the region.”

Weil is widely seen as the jewel of Rheingau, historically Germany’s grandest wine region. The pristine estate and its smart new cellars, not to mention its growth from 18 to 90 hectares of vineyard in the past 25 years and the impeccable quality and consistency of its wines, including a miraculous Trockenbeerenauslese every year, are all presumably made possible by the yen underpinning them. Wilhelm Weil, who had to take over the family estate as a very young man at about the time of the sale to Suntory, is an exceptional steward.