Cores Coffee Grinder
2025-07-08 05:12:25

Introducing the Cores Portable Coffee Grinder C351 for Outdoor Coffee Enjoyment

Cores' New Portable Coffee Grinder C351



Cores, a specialty coffee product brand operated by Oishi & Associates from Shibuya, Tokyo, is set to launch its C351 Portable Coffee Grinder as a pioneering product on Makuake on July 9, 2025. This innovative coffee grinder is tailored for coffee aficionados who wish to indulge in freshly ground coffee, no matter where they are.

Designed for convenience, the C351 is compact and lightweight, making it perfect for outdoor activities such as camping and picnics. Users can easily grind coffee beans by simply extending the retractable cup and pressing a button. The grinder features a high-quality stainless steel conical burr, ensuring that the grind size is uniform and evenly distributed, which enhances the brewed coffee's original flavors effectively.

Project Overview


The fundraising project runs from July 9, 2025 to August 17, 2025, providing backers an opportunity to support the creation of this portable grinder. More details can be found here.

Key Features of the C351 Grinder


  • - Updated Design: The new design boasts a centrally placed logo for a sleek and modern look.
  • - Battery Indicator: It is equipped with a memory feature that displays battery levels at a glance, preventing unexpected power outages during use.
  • - Increased Capacity: With an additional 5g capacity, users can grind enough beans for about two cups of coffee at once (approximately 25g total).

Made for Coffee Lovers


Cores has crafted this portable and rechargeable grinder with the vision of allowing coffee lovers to enjoy freshly ground beans anywhere, at any time. Its versatility lets users enjoy their brewing experience both at home and on the go. Whether it’s a camping trip or a relaxing afternoon at home, the grinder's space-saving design ensures it can be easily stored without taking much space.

Charging the C351 is a breeze with a USB TYPE-C connector that fully charges in about 3 hours, providing approximately 20 to 30 grinds per charge, depending on usage. The grind settings are adjustable, ranging from espresso to drip methods, allowing users to create their desired coffee brew. Additionally, a cleaning brush is included, and the grinder's structure facilitates easy maintenance.

Technical Specifications


  • - Product name: Portable Coffee Grinder C351
  • - Price: ¥17,600 (tax included)
  • - Size: approximately W5.5cm x D5.5cm x H15.5cm
  • - Weight: about 420g
  • - USB cable length: approximately 0.44m
  • - Full charge time: around 3 hours
  • - Coffee bean capacity: 25g
  • - Materials: Aluminum, stainless steel, ABS resin, PCTG resin
  • - Included: Carrying pouch, charging USB cable, cleaning brush
  • - Country of manufacture: China
  • - JAN code: 4560132473937

About Cores and Oishi & Associates


Cores is dedicated to highlighting the diverse flavors of specialty coffee. The brand's philosophy revolves around the concept of "Coffee as it is," aiming to preserve the unique characteristics of each bean. Their flagship product, the Cores Gold Filter, perfectly embodies this philosophy.

Founded in 1997 with the goal of enhancing everyday life, Oishi & Associates has established itself as a trusted brand in home appliances and lifestyle goods. They have contributed significantly to the popularization of electric kettles in Japan and have grown their own coffee product line, Cores, since 2013, working alongside coffee professionals to develop products that resonate with coffee lovers worldwide.


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Topics Consumer Products & Retail)

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