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River & Stone Tea: Minneapolis Miller of Wazuka Tencha

River & Stone Tea mills Wazuka tencha to order in Minneapolis on Japanese granite stones, producing only 40 grams of fresh matcha per hour.
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Who is River & Stone Tea?

River & Stone Tea is a matcha brand based in Minneapolis that mills fresh ceremonial-grade matcha on Japanese granite stones. Sourcing Wazuka tencha exclusively from Kyoto Prefecture, it specialises in single-cultivar bowls milled to order in batches of only 30–40 grams per hour.

Partnering directly with family-run farms in Wazuka, the brand uses oishita saibai shading and hand-harvests only the youngest leaves. Single-cultivar offerings include Asahi, Samidori, Okumidori, Gokou, and rare Old Bush Zairai—all stone-milled slowly to preserve vibrant colour and umami complexity.

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River & Stone Tea $250.0 / 100 g

River & Stone Tea Asahi of Kokyo Wazuka Ceremonial Matcha

River & Stone Tea Asahi of Kokyo ceremonial matcha is a single-cultivar Wazuka tea with powerful umami and notes of orchid, herbs, and pepper.

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Rated 4/5 by 2 reviews

River & Stone Tea in details

River & Stone Tea operates one of the few authentic matcha mills in the United States, grinding fresh ceremonial matcha daily using traditional methods that honor centuries of Japanese tea culture. Based in Minneapolis, Minnesota, the company sources premium tencha from Uji, Japan—the historic heartland of matcha production—and mills it to order on imported, hand-carved granite stones.

The Art of Daily Milling

Unlike commercially pre-ground matcha that sits on shelves for months, River & Stone Tea mills each tin only after you order. This approach maximizes aromatic complexity and preserves the health-promoting compounds that degrade rapidly after grinding. Their authentic stone-ground process produces just 40 grams per hour, ensuring the finest powder and creamiest texture possible.

The difference is immediately noticeable. Their matcha delivers the smooth, umami-rich character of true ceremonial grade tea without the bitterness or astringency common in lower-quality products.

Commitment to Natural Quality

River & Stone Tea specializes in matcha grown without pesticides or artificial fertilizers—even fewer inputs than standard organic certification requires. This dedication to natural cultivation methods produces cleaner, more vibrant tea that reflects the authentic terroir of each harvest.

The company offers an exceptional range of single-cultivar matchas, including rare varieties like Asahi, Okumidori, Samidori, and Old Bush Zairai. Single-cultivar teas remain uncommon in the ceremonial matcha market, where blends typically dominate. These distinctive offerings allow tea enthusiasts to explore subtle differences in flavor profiles shaped by cultivar genetics and seasonal variations.

From Tea House to Your Cup

River & Stone Tea emerged as a sister company to Northeast Tea House, a Minneapolis retail location that opened in 2020. The original matcha mill still operates daily at the tea house, while additional mills run nearby in a dedicated space for milling and packaging.

Their product line spans from approachable daily-drinking options like Mill City Blend and Kagoshima Blend to premium selections suitable for traditional koicha preparation. Every offering—from entry-level to rare single estates—meets the same rigorous standards: shade-grown for optimal amino acid development, spring-harvested for peak flavor, and traditionally stone-milled for authentic texture.

For matcha drinkers seeking unparalleled freshness and genuine Japanese quality without traveling to Japan, River & Stone Tea delivers an experience that respects both tradition and the discerning modern palate.

About the River & Stone Tea Matcha

River & Stone Tea mills ceremonial-grade matcha fresh to order on traditional Japanese granite mills in Minneapolis, specialising in single-cultivar bowls that show the character of each individual cultivar.

Single-cultivar bowls

  • Asahi of Kokyo, Wazuka: naturally grown from the Wazuka region, harmonising sweetness and umami.
  • Samidori: vibrant emerald hue with a velvety texture.
  • Okumidori: a refreshing, subtly grassy profile.
  • Gokou: complex flavour development.
  • Old Bush Zairai: a rare seed-grown matcha from old bushes with distinctive terroir.

Blends and sourcing

Signature blends include the Mill City Blend, a natural Kagoshima Blend, and a wild-grown Wild Yabukita. Every matcha is milled from high-quality tencha, shade-grown leaves from the Uji region of Kyoto Prefecture, grown without pesticides or artificial fertilizers and milled to order in small batches for freshness.

Harvest location

River & Stone Tea sources its premium tencha exclusively from Wazuka, part of the wider Uji area of Japan's Kyoto Prefecture and revered as a cradle of modern tencha cultivation.

Shading and natural farming

Cultivation begins with oishita saibai, shade cultivation applied about three to four weeks before harvest in late April or early May. Shading raises L-theanine and chlorophyll for the sweet, umami-rich flavor and vibrant green color. The small, family-run partner farms use natural methods:

  • No artificial fertilizers, relying on organic compost and soil amendments
  • No synthetic pesticides or herbicides, using beneficial insects and neem oil
  • Weeding by hand to protect soil integrity

Harvest and milling

Hand-harvesting allows selective picking of the youngest, most tender leaves by size, color, and unopened buds. The tencha is then shipped to Minneapolis and stone-milled on Japanese granite mills at 30-40 grams per hour for the finest powder.

River & Stone Tea History

River & Stone Tea grew out of its founders' experience running Northeast Tea House, which opened in Minneapolis in August 2020 and installed the first imported Japanese granite mill.

Milestones

  • 2021 — River & Stone Tea launched as a sister company focused on house-milled matcha.
  • 2022 — Opened a dedicated milling and packaging facility.
  • 2023 — Formalized partnerships with family-run farms in Wazuka, Japan.
August 1, 2020

Northeast Tea House Opens

The parent company Northeast Tea House opened in Minneapolis in August 2020, establishing the foundation for River & Stone Tea. The first imported Japanese granite matcha mill was installed and began daily operation, serving as the testing ground for their fresh-milling concept and validating their vision for authentic matcha production in the United States.

January 1, 2021

River & Stone Tea Launch

River & Stone Tea was founded as a sister company to Northeast Tea House in January 2021, focusing exclusively on small-batch, house-milled ceremonial matcha. This strategic launch allowed the brand to prioritize freshness, quality, and sustainability while leveraging the operational success of the original tea house.

January 1, 2022

Dedicated Milling Facility Established

In 2022, River & Stone Tea opened a dedicated milling and packaging facility adjacent to Northeast Tea House. This expansion enabled simultaneous operation of multiple authentic Japanese granite mills, significantly boosting production capacity without compromising the fresh, made-to-order milling process.

January 1, 2023

Partnership with Wazuka Farmers

River & Stone Tea formalized partnerships with small, family-run farms in Wazuka, Japan, renowned for premium tencha cultivation. These collaborations emphasize natural farming practices, ecological harmony, and traceability, ensuring matcha leaves are grown without synthetic fertilizers, pesticides, or herbicides.

Frequently asked questions

Here are some frequently asked questions and answers.

What makes River & Stone Tea's Minneapolis milling process different from other matcha brands?

River & Stone Tea mills ceremonial-grade matcha fresh to order in Minneapolis using authentic Japanese granite mills imported directly from Japan. Unlike mass-produced matcha that sits on shelves for months, their stone mills produce only 30-40 grams of matcha per hour, ensuring each batch maintains optimal freshness and flavor. This slow, deliberate milling process prevents heat buildup that can compromise the delicate tencha leaves, resulting in exceptionally smooth and creamy matcha powder.

How does River & Stone Tea's connection to Northeast Tea House benefit their matcha quality?

River & Stone Tea operates as a sister company to Northeast Tea House, which opened in Minneapolis in August 2020. Their first matcha mill is still operated daily out of the Tea House, serving as a testing ground for their milling techniques. This retail connection allows them to receive immediate customer feedback and continuously refine their milling process. Additional mills now operate from a dedicated facility nearby that focuses entirely on matcha milling and packaging, combining retail experience with specialized production.

Which River & Stone Tea matcha should I choose: Gokou, Komakage, or Old Bush Zarai?

River & Stone Tea offers three distinct single-cultivar options:

  • Gokou Matcha Powder - Known for its balanced sweetness and umami characteristics
  • Komakage Matcha Powder - Features vibrant emerald color and velvety texture
  • Old Bush Zarai Matcha Powder - Offers a unique flavor profile from older tea bushes with deeper complexity

Each represents a different tencha cultivar from their Wazuka farms, allowing you to experience the subtle nuances that single-cultivar matcha provides compared to blended varieties.

Why does River & Stone Tea specifically source from Wazuka rather than other Uji regions?

Wazuka is revered as the cradle of modern tencha cultivation within the broader Uji region of Japan. River & Stone Tea partners with small, family-run farms in Wazuka that practice natural farming methods, rejecting artificial fertilizers and synthetic pesticides. These farms use traditional oishita saibai (shading techniques) for 3-4 weeks before harvest, elevating L-Theanine and chlorophyll production. The region's legacy of tea cultivation combined with sustainable practices ensures the exceptional quality that River & Stone Tea demands for their fresh-milled matcha.

Is River & Stone Tea's granite milling really superior to modern electric grinders?

Yes, River & Stone Tea's authentic Japanese granite mills provide significant advantages over modern electric grinders. Stone mills grind the tencha leaves gently without generating heat that can damage delicate flavors and aromas. The granite material and slow milling speed create the optimal particle size for maximum smoothness and creaminess when whisked. While electric grinders work faster, they often produce inconsistent particle sizes and heat that compromises the matcha's ceremonial-grade quality. River & Stone Tea's commitment to traditional stone milling reflects their dedication to authentic Japanese methods over mass production efficiency.