Sakes have been made by family-owned Tosa brewery since 1877. The name ‘KEIGETSU’, is a Japanese term which describes the beautiful evening scene created when the moon hangs over Katsurahama shore. The sakes are made from organically-grown, local rice varieties.The variety Gin-no-Yume is a sake-specific rice that is a crossing of Hinohikari and Yamadanishiki and specially developed for the Kōchi prefecture. The rice is grown within two kilometres of the brewery, in a mountainous region called Tosa Reihoku in the Kōchi prefecture, it grows well on the terraced rice paddies at 300 – 600 metres above sea level, with high diurnal temperature swings.
Normally they use local rice varieties, but Keigetsu reintroduced the "King of Sake Rice" Yamadanishiki from the Hyogo Prefecture into Tosa. The rice paddies are found at 350-600 metres above sea level, based mainly on clay soil. Yamadanishiki is regarded as the best sake rice. This has a 45% polish rate meaning 55% of the original rice grain has been polished away. Sake Nature has enticing aromas of beautifully ripe stone fruit and white blossom on the nose. The palate offers well-balanced, pure flavours of juicy pear and peach with an elegant and persistent finish.