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For the color and aroma of freshly ground matcha

05 "Matcha-Specific" Premium Black Granite - Cylindrical Shape with Matte Finish
This is a page for international customers.

Product price 703USD

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February 21, 2025 We have resolved the issue with the order page

Production

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The stone used is an exceptionally rare "premium black granite." This stone is characterized by its lack of crystalline grains and its higher specific gravity compared to other granites.
The design is a very simple cylindrical shape.
To create a calm and elegant appearance, the surface is finished with a matte texture, suppressing gloss. Precise craftsmanship is required to form an accurate, distortion-free circular shape.
This is a stone mill specifically designed for grinding tencha into fine matcha powder.
With standard stone mills, grinding fine powder requires carefully feeding the tea leaves in small amounts. However, my matcha mill allows you to add the entire desired quantity of tea leaves and simply continue turning the upper millstone to produce fine matcha powder effortlessly.

Product Details

Price 703USD
Shipping Cost It depends on the country or region
Stone Material Used Granite (Premium Black Granite)
Height Approximately 21 cm (excluding when the handle bar is attached)
Weight Upper Millstone = 10 kg Lower Millstone = 11 kg Total = 21.0 kg
Outer Diameter Lower Millstone Diameter = 24.0 cm
Upper Millstone Diameter = 21.0 cm
Required Installation Diameter for Rotation with Handle Bar Attached = 32.0 cm or more
Handle SAKURA (Natural Wood)
Timeframe
from Order to
Shipping from Japan
2?3 days if in stock; approximately 10 days for new production.
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Detailed Design Specifications

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The stone used is an exceptionally rare "premium black granite." This stone is characterized by its lack of crystalline grains and its higher specific gravity compared to other granites. In general, matcha mills require users to add tea leaves gradually while grinding. However, if the amount added is not consistent, the particle size of the matcha can vary. My matcha mill is specifically designed for grinding matcha only, ensuring that even those unfamiliar with using stone mills can produce uniformly ground matcha. To use, simply add all the tea leaves (tencha) you wish to grind into the top hole of the mill. Then, continue turning the upper millstone. The ground matcha is collected by an attached brush and directed into the container, making the process efficient and user-friendly. サンプルイメージ

The position of the hole relative to the center point also plays a role in grinding performance and efficiency. While it might seem that ground powder exits from all around the millstone's circumference, observation reveals that it only discharges from one specific spot on the upper millstone. Because this spot rotates, it creates the appearance of uniform discharge across the entire circumference. This specific spot on the upper millstone is located between 45 and 90 degrees counterclockwise from the handle attachment point. The reason for this range lies in the pressure distribution on the grinding surfaces. When the millstone is stationary, the pressure is evenly distributed. However, when the handle is attached and held with the right hand, additional force is applied to the handle attachment area, increasing pressure in that region. This increased pressure at one spot causes a decrease in pressure on the opposite side of the grinding surface. When the millstone rotates, the high-pressure area prevents the powder from entering, so the powder is pushed out slightly before reaching the high-pressure zone. The area where the coffee beans are first crushed often causes the upper millstone to lift slightly. To counteract this, the crushing force must be aligned with the line connecting the handle and the center point. Since the handle generates force not directly downward but angled toward the rotation direction, the hole must be located 90 degrees forward in the direction of rotation from the handle attachment. Both the size and position of the hole are determined based on careful observation, imagining the internal flow of the powder, and verification through prototypes and testing.

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A common misconception is that the upper and lower grinding surfaces are entirely in contact. In reality, only a portion near the outer edge is in contact, with a gradually widening space extending inward toward the center. Materials fed into the millstone are crushed into smaller pieces step by step, eventually turning into powder at the outer edge and being discharged. This step-by-step grinding process is influenced by the structure of the "fukumi" (space), which is designed to narrow progressively to ensure materials are crushed into increasingly smaller particles. When grinding larger materials such as soybeans, the depth of the fukumi needs to be greater, ideally about half the diameter of the material. For smaller materials like sesame seeds, the depth of the fukumi is minimal or nearly nonexistent. Understanding the function of the fukumi and designing it with precise and adequate dimensions is crucial. If the fukumi is not properly designed, it can lead to issues such as large amounts of material remaining inside the millstone after grinding, or materials not entering the grinding space at all, causing them to simply spin around at the bottom of the "material feed hole" without being ground.

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This is a photo of the lower millstone with the upper millstone removed during the grinding process.
As you can see, very little tea leaves remain inside the millstone.
To prevent wasting the precious tencha, the grinding surface of the upper millstone has been specially designed with a unique structure.
After grinding is complete, please use a stiff brush to clean any remaining powder from the fine grooves.

Order & Delivery
Order

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Even if the customs duty is 0%, VAT (Value Added Tax) may be applied upon import.
Standard VAT Rates in Major EU Countries (as of 2024): Germany: 19% France: 20% Italy: 22% Spain: 21% Netherlands: 21%
VAT is calculated based on the CIF price (Product Price + Shipping Cost + Insurance Fee).

For orders to Germany, the customs authorities require the submission of an [order confirmation with shipping costs] and a [proof of payment]
Please note that taxes will be applied to the total amount, including shipping costs
Until the required documents are submitted, the shipment status will be displayed as [awaiting customs clearance] or [in transit]

Payment Methods

I will send the total amount for the product and shipping via [PayPal] to your email address. Please follow the instructions on the screen and enter your credit card information.

Home page

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On the homepage, select a product and click on it.

Product selection

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After moving to the product details page, click on [Place an order].

Order page

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A separate window for placing the order will open.
Please confirm that the selected product is correct.

Enter information

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Please enter your information.
If there are any mistakes in this information, the product may get lost, so please fill it out accurately.
Pay special attention to your email address, as it is important for communication.

Shipping Method Selection

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Since the shipping cost and delivery time vary depending on the shipping method, please specify either one.

Order Confirmation Document

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We are sending you an Order Confirmation to ensure there are no mistakes in your order details.
Please carefully check the contents, including the delivery address and total amount.
The email will be sent from millstone-yoshida@helen.ocn.ne with the subject line "ISHIKOUBOU YOSHIDA".
Please note that it may be mistakenly classified as junk or spam mail, so kindly check your spam folder as well.

Delivery

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For air shipments, deliveries to North America, Australia, and New Zealand will be handled by UPS.
For other regions such as Europe and Asia, we use international parcels delivered by each region's local postal service.
For sea shipments, all regions will be handled as international parcels through the respective local postal services.

Product Shipment

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Once the product is ready for shipment,
we will send you an email containing the shipping label PDF and the PayPal invoice.
Please check the shipping label carefully to ensure all details are correct.
Open the PayPal invoice notification and proceed with the payment.
The shipment will be made only after the payment is confirmed.
(We are unable to proceed with the shipment if payment has not been verified.)

Tracking of the delivery

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Once the product has been shipped, we will email you the tracking number.
Please access the UPS tracking page.

Current location of the product

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The location of the product at the time of inquiry will be displayed.

Lost Product

UPS deliveries can sometimes be inaccurate and may result in the package being delivered to a hub in a different town from the specified address, causing delays.
In such cases, since our company in Japan cannot directly provide instructions to UPS,
we may ask the recipient to contact UPS directly for further instructions.

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