【Ito Atsuomi - A Coffee Artisan from Japan】
The speaker in the video is Ito Atsuomi, a coffee expert with both hands-on experience and professional credentials.
He is a CQI-certified Q Grader and the leading figure behind the renowned coffee brand Goodman Roaster, which operates multiple cafés in Kyoto and Taipei, where he oversees operations and coffee innovation.
In addition to running physical cafés, Ito is active on YouTube, where he unboxes products and shares educational coffee content.
Ito's goal is to make complex equipment and brewing techniques easy to understand and apply. His channel has already attracted over 10,000 subscribers.
【Smaller Than a Textbook, Light Enough to Lift with One Hand】
In the video, Ito mentions that the A4Z and A5 grinders measure 13cm in length, 6cm in width, and 24cm in height. Their overall size is smaller than a standard A4 textbook.
Despite being constructed entirely from aluminum alloy, each grinder weighs under 3kg, making it easy to lift even for women or users with less upper body strength.
Regarding grind adjustment, unlike traditional grinders that require disassembly to change grind settings, these two models feature an external top-mounted adjustment dial ring for intuitive and convenient grind control.
The adjustment system supports up to 300 clicks, with 100 clicks per rotation and a precision of 0.008 mm per click.
The entire grinder features a magnetic assembly design. Tool-free disassembly makes cleaning and zero calibration fast and easy.
【Portable Grinding, Ready to Go Anywhere】
Ito shares that both the A4Z and A5 grinders are equipped with Type-C charging. Once fully charged, they can support between 30 to 50 grinding sessions[1].
Since they do not need to be plugged in while grinding, they are ideal for outdoor camping, coffee events, or family gatherings. Users can take them anywhere and grind on the spot.
Unlike hand grinders, these electric models eliminate the effort of manual grinding, making them more convenient for everyday use. Ito even states that this is the biggest advantage of the A4Z and A5 grinders.
Frank
Femobook's Editor
【Professional-Grade Grind Uniformity】
After real-world testing, Ito states the following feedback for each model:
A4Z: Designed specifically for pour-over, the A4Z features a 48mm conical burr, the same specification used in the popular manual grinder 1Zpresso ZP6.
The resulting grounds show clearly defined particle sizes even visible to the naked eye. The grind quality rivals high-end manual grinders from other brands.
For coffee lovers who are particular about their pour-over flavor, this grinder is a perfect fit for pour-over enthusiasts seeking clarity and precision.
A5: Equipped with a 53mm conical burr for both pour-over and espresso, the A5 produces fine, evenly distributed espresso grounds at its finest settings. Its performance approaches commercial-grade standards.
【Ito Atsuomi’s Review: A Grinder with Seductive Aroma and Smooth Body】
Ito points out that the A4Z performs excellently for pour-over brewing. It brings out a seductive, captivating aroma and delivers a smooth mouthfeel.
While he finds the grind cup’s capacity a bit limited, he praises the A4Z’s stable grinding process, soft and pleasant operating noise, and the auto-stop function that kicks in once grinding is complete.
Ito concludes with high praise, saying the A4Z exceeded his expectations in both aroma and usability.
Note: The content above is excerpted from the YouTube video by《Ito atsuomi / 日本咖啡職人興京都的咖啡狂人們》.
