Producer

Shiraiwa K.K.

Explore the spirits, production style and story of Shiraiwa K.K..

Shiraiwa K.K. is the Japanese company behind the IWA brand, known for the IWA 5 line: a contemporary sake project born from an international collaboration led by Richard Geoffroy. Production takes place in a modern kura in Shiraiwa (Tateyama, Toyama Prefecture) designed by Kengo Kuma and is characterized by an assemblage approach that combines rice varieties and yeast strains.
sake premium sake sake assemblage Japanese sake
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Producer range

Producer range Shiraiwa K.K.

Spirit categories

sake premium sake sake assemblage Japanese sake

Representative products

Iwa Sakè 5 - Astucciato Iwa Sakè 5

Raw materials

Yamada Nishiki rice Omachi rice Gohyakumangoku rice local spring water yeasts (multiple strains)
Distillation and production

Distillation and production

Production method

Production is based on traditional sake fermentation techniques (rice polishing, koji preparation, fermentation and pressing) integrated with a strong use of assemblage: IWA 5 is obtained by combining multiple classes of elements — different rice varieties, multiple yeast strains, methods of moto propagation and fermentation regimes — and by reassessing the recipe year after year in an experimental process.

Producer history Shiraiwa K.K.

The IWA project, carried out under the name Shiraiwa K.K., was developed under the guidance of founder and maker Richard Geoffroy (former Chef de Cave of Dom Pérignon). The modern kura in Shiraiwa opened in spring 2021 in Shiraiwa, Tateyama (Toyama Prefecture). Several collaborators contributed to the project, including the local producer Masuda Shuzo. The company presents itself as a relatively recent initiative in the sake landscape, with strong international collaborations and a premium positioning.

Production philosophy

Shiraiwa K.K.'s philosophy balances tradition and experimentation: respect for traditional sake production techniques combined with an experimental assemblage approach (controlled blending) that seeks lightness, balance and sensory depth. The company also emphasizes the connection with the territory, the community and design as integrated elements of the product experience.

Territory

Shiraiwa (Tateyama), Toyama Prefecture, Japan. The area is characterized by heavy snowfall, pure mountain meltwater and extensive rice cultivation, elements the company cites as integral to the product's identity.

Shiraiwa K.K.

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