Just upstream, the mood softens again. The old heart of Niederkassel still feels like the village it once was, with snug traditional taverns and a slower pace, and yet some of its riverside streets are quietly among the priciest in town.
Its real surprise, though, is hidden behind a garden wall on Brüggener Weg: the EKŌ-Haus der japanischen Kultur. Düsseldorf is home to the largest Japanese community in Germany, and in 1993 the industrialist Yehan Numata gave the city this remarkable place — the only Jōdo-Shinshū Buddhist temple of its kind in Europe, modelled on a temple near Utsunomiya, north of Tokyo. Around it lies a meticulous dry garden, where rivers and waterfalls are "drawn" entirely in raked stone, and a traditional wooden house with a tea room. You can join a tea ceremony, take a course in ink painting, calligraphy or ikebana, or simply slip off your shoes and let the city's hurry drop away for an afternoon — admission is gentle on the wallet. It is, in the best sense, a short trip to Japan without leaving NRW.