Ginsui
Founded in 1915, the originator of Shimabara's famous Kanzarashi. Located right beside the Hama-no-Kawa spring—one of Japan's Top 100 Waters—the soft white rice dumplings are chilled in this spring water and served with a gentle honey-sugar syrup. This sweet has been a summer tradition in Shimabara since the Edo period. Closed for 20 years, then revived by Shimabara City in 2016. Tabelog 3.55/217 reviews—top of Shimabara's sweets category.
Reviews say 'the experience of eating while watching the spring is incredible,' 'love the gentle simplicity of the syrup,' 'perfect stop after visiting Shimabara Castle,' and 'the white dumplings are silky and delicious.' Tabelog 3.55/217 reviews. TripAdvisor 4.0+. The rare value as the 1915-founded originator draws visitors from afar.