Coffee makers with a grinder in Japan: 5 picks from ¥12,300

Coffee maker with grinder in Japan: five models, maximum of three to six cups
Twinbird has a flat-burr mill; Siroca SC-A271 a propeller mill; Panasonic rinses its mill
Melitta and Siroca SC-A271 have timers; Twinbird and Panasonic list none

The five

Best for	Where to get it	Score	Street price, incl. tax
No measuring of beans or water — a cone mill, and up to six cups — if you can’t decide	Siroca cone-mill fully automatic coffee maker, Cafe-bako PRO (CM-6C271) See price	88/100	¥29,300 (street price)
A slow flat-burr mill and brewing at 83°C, for up to three careful cups	Twinbird fully automatic coffee maker, 3 cups (CM-D457) See price	80/100	¥24,526 (street price)
A conical mill and Melitta’s single-hole filter — six cups, with a timer	Melitta Aroma Fresh, 6 cups (AFG622-1B) See price	79/100	¥29,799 (street price)
Fully automatic in the low ¥10,000s — a light 2.2 kg propeller-mill model that fits anywhere	Siroca fully automatic coffee maker (SC-A271) See price	74/100	¥12,300 (street price)
Rinses its mill every time — a slim four-cup model, 15.2 cm wide	Panasonic fully automatic coffee maker (NC-A58) See price	73/100	¥21,780 (street price)

These are sold on Rakuten Ichiba, which generally ships within Japan only, and they run on Japanese mains power (100V, 50/60Hz). They suit a home in Japan rather than a suitcase.

No measuring of beans or water — a cone mill, and up to six cups

Siroca cone-mill fully automatic coffee maker, Cafe-bako PRO (CM-6C271)

The amount ground is set in five steps of grinding time
Glass server makes up to six cups of 120 ml
A ‘jika-mug’ setting brews one cup straight into a mug

See today’s price on Rakuten→

Why it made the five

About 200 g of beans in the hopper and water in the tank — it measures both for the number of cups
A cone mill, with the grind set steplessly from fine to coarse
A higher brewing temperature for light roasts or a lower one for dark roasts
Right for: Skipping the measuring every morning, or brewing more for two or a family.
Not for: Having little height to spare where it will stand (42.1 cm tall).
Worth knowing: About 42.1 cm tall without the server, on the tall side of the nine we compared. It keeps warm for 30 minutes only; after that the coffee needs reheating.

Score breakdown — 88/100

Criterion	Stars	Why
Quality	★★★★★	A cone mill earns three; a choice of two brewing temperatures (higher and lower) adds one, and a stepless grind from fine to coarse one. It has a bloom step
Value for money	★★★☆☆	¥29,300, the cheapest on Rakuten, earns three
Easy to live with	★★★★★	From three, measuring beans and water for the number of cups adds one and a timer one. 4.1 kg, so no deduction. There is no automatic mill rinse, but a mill-care mode clears out leftover grounds
Trust	★★★★★	412 reviews averaging 4.58 across the top 30 Rakuten listings by model number — 100 or more at 4.5 or higher earns five
Only here	★★★★☆	Of the three that measure beans from a hopper (CM-6C271, SC-C281, K-CM9), the only one making up to six cups — the SC-C281 makes four and the K-CM9 five. Its hopper of about 200 g, shared with the SC-C281 in the same series, is the largest of the nine — one point

A slow flat-burr mill and brewing at 83°C, for up to three careful cups

Twinbird fully automatic coffee maker, 3 cups (CM-D457)

Supervised by Mamoru Taguchi of Café Bach
Taguchi recommends 83°C as the most balanced in taste
Bloom water is adjusted in three steps for one, two or three cups

See today’s price on Rakuten→

Why it made the five

A slow flat-burr mill with Tsubame-Sanjo stainless blades, grinding evenly with little friction heat
Brewing at 83°C or 90°C; coarse, medium or fine grind
A shower drip from six directions, close to pouring by hand
Right for: One or two people wanting one to three cups made with care for the taste.
Not for: Brewing four cups or more at once, or setting a timer for the morning.
Worth knowing: Its maximum of 450 ml (three cups) is the smallest of the nine we compared. It keeps warm for 20 minutes after brewing, and the official page lists no timer.

Score breakdown — 80/100

Criterion	Stars	Why
Quality	★★★★★	A slow flat-burr mill earns three; a choice of 83°C or 90°C adds one, and coarse, medium and fine grinds one. A shower drip from six directions
Value for money	★★★☆☆	¥24,526, the cheapest on Rakuten, earns three (¥41,800 in the official store)
Easy to live with	★★★☆☆	From three, with no automatic mill rinse, bean measuring or timer listed officially, so nothing added. About 4.1 kg, so no deduction. The mill comes out for brushing, and there are three maintenance modes
Trust	★★★★★	310 reviews averaging 4.58 across the top 30 Rakuten listings by model number — 100 or more at 4.5 or higher earns five
Only here	★★★★☆	Only Twinbird’s two models have a flat-burr mill among the nine, and this is the smaller, three-cup one. Supervised by Mamoru Taguchi of Café Bach, with bloom water adjusted in three steps for the number of cups — one point

A conical mill and Melitta’s single-hole filter — six cups, with a timer

Melitta Aroma Fresh, 6 cups (AFG622-1B)

From Melitta, the paper-drip maker
Holds up to 750 ml of water and brews about 600 ml at most
Tells you when to descale

See today’s price on Rakuten→

Why it made the five

A conical mill aimed at an even grind, with three settings
Melitta’s single-hole filter, controlling the brewing time
A timer, so coffee is ready when you wake
Right for: Liking the taste of paper drip, or brewing four to six cups at once.
Not for: Not wanting to keep buying paper filters.
Worth knowing: It takes Melitta 1×2 filter papers; only a brush is included. The keep-warm is a heated plate, and the official page does not say for how long.

Score breakdown — 79/100

Criterion	Stars	Why
Quality	★★★★☆	A conical mill earns three; three grind settings add one. No choice of brewing temperature is listed. The single-hole filter controls brewing time, and the strength can be adjusted
Value for money	★★★☆☆	¥29,799, the cheapest on Rakuten, earns three
Easy to live with	★★★★☆	From three, a timer adds one. No automatic mill rinse or bean measuring listed. 3.5 kg, so no deduction. The water tank and hopper come off
Trust	★★★★★	104 reviews averaging 4.71 across the top 30 Rakuten listings by model number — 100 or more at 4.5 or higher earns five
Only here	★★★★☆	The only one of the nine using Melitta’s single-hole filter to control brewing time. It won a Good Product award (judged category) in the Specialty Coffee Association of Japan’s New Product Award in 2022 — one point

Fully automatic in the low ¥10,000s — a light 2.2 kg propeller-mill model that fits anywhere

Siroca fully automatic coffee maker (SC-A271)

The mill has four settings, for one to four cups
Two tastes, Rich and Mild, which differ in bloom time
Timer and 30 minutes of keep-warm

See today’s price on Rakuten→

Why it made the five

Fully automatic from grinding to brewing, with the cheapest Rakuten price in the low ¥10,000s
A compact body: about 2.2 kg with the server, and 22 cm deep
A mesh filter, so there are no paper filters to buy
Right for: Trying a coffee maker with a mill for the first time, or keeping space and budget down.
Not for: Fine-tuning the taste by changing the grind.
Worth knowing: The grind is medium-fine only and cannot be changed. The water tank is built into the body and does not come off.

Score breakdown — 74/100

Criterion	Stars	Why
Quality	★★☆☆☆	A propeller mill earns two; no choice of brewing temperature and a single medium-fine grind, so nothing added. A bloom step, with Rich and Mild set by bloom time
Value for money	★★★★★	¥12,300, the cheapest on Rakuten, earns five
Easy to live with	★★★★☆	From three, a timer adds one. No automatic mill rinse or bean measuring. 2.2 kg, so no deduction. The basket with the mill comes out whole for washing
Trust	★★★★☆	1,516 reviews averaging 4.24 across the top 30 Rakuten listings by model number — 100 or more earns four
Only here	★★★★☆	The cheapest (¥12,300) and lightest (2.2 kg with the server) of the nine, and its mesh filter brews without paper — one point

Rinses its mill every time — a slim four-cup model, 15.2 cm wide

Panasonic fully automatic coffee maker (NC-A58)

Four cups, with an iced-coffee mode
Keep-warm lowers the temperature after 30 minutes and switches off after two hours

See today’s price on Rakuten→

Why it made the five

The mill is rinsed automatically before the bloom, every time
Three courses — Rich, Mild, Strong — and two grinds, for six tastes
A dedicated course for decaffeinated beans
Right for: Cutting down on mill cleaning, or fitting it into a narrow gap in the kitchen.
Not for: Setting a timer for the morning.
Worth knowing: The official specification lists no timer. It takes paper filters, and the decaf course offers no choice of brewing style.

Score breakdown — 73/100

Criterion	Stars	Why
Quality	★★☆☆☆	The mill type is not published (a vertical mill that grinds and drops), which earns two; the brewing temperature is set automatically by course with no choice, and there are two grinds, so nothing added. Three courses and two grinds make six combinations
Value for money	★★★★☆	¥21,780, the cheapest on Rakuten, earns four
Easy to live with	★★★★☆	From three, the automatic shower rinse of the mill before the bloom adds one. No bean measuring or timer listed. 3.2 kg, so no deduction
Trust	★★★★★	250 reviews averaging 4.55 across the top 30 Rakuten listings by model number — 100 or more at 4.5 or higher earns five
Only here	★★★★☆	At 15.2 cm wide, the slimmest of the nine, and the only one that showers its mill clean before the bloom — one point

Know before you buy

The mill decides the grind. Cone, conical and flat-burr mills grind between two blades; Siroca says its cone mill generates little friction heat, and Twinbird says its slow flat-burr mill keeps friction heat down for an even grind. A propeller mill chops, and Siroca’s SC-A271 grinds medium-fine only.
Panasonic’s NC-A58 and Zojirushi’s EC-RT40 do not publish their mill type; you swap mesh filters to get two grinds.
Capacity runs from 450 ml (three cups, Twinbird CM-D457) to 900 ml (six cups, Twinbird CM-D465) among the nine we compared.
Only three of the nine measure the beans for you from a hopper: Siroca’s CM-6C271 and SC-C281 and Toffy’s K-CM9. The rest want beans measured in each time.
Only two rinse the mill themselves — the Panasonic NC-A58 and the Zojirushi EC-RT40. Five of the nine have a timer.
Espresso machines and single-cup models are absent: we kept drip machines that make two cups or more.

How we chose: theme, conditions, scoring

How we chose

Candidates: 19
Met every condition below: 17
Kept: five, each the best at something different

Conditions (all of them, not most of them)

A drip coffee maker that grinds the beans and brews automatically once you put them in (espresso machines excluded)
Makes two coffee cups or more at a time
The maximum cups (or water), power consumption and weight are published on the maker’s site
The machine can be bought new on Rakuten Ichiba (second-hand, parts and hometown-tax gifts excluded)

Scoring

Five criteria, one to five stars each, weighted to one hundred points. Every star says where the number came from.

Quality25 pts
- Set by the mill: a cone, conical or flat-burr mill, which grinds between two blades, stated officially earns three stars; a propeller mill, or no mill type stated, earns two. Add one for a choice of two or more brewing temperatures, and one for three or more grind settings (or a stepless grind). Five at most.
Value for money20 pts
- The cheapest new price for the machine on Rakuten Ichiba. Under ¥15,000 is five stars, ¥15,000 to under ¥22,000 four, ¥22,000 to under ¥30,000 three, ¥30,000 to under ¥40,000 two, ¥40,000 or more one.
Easy to live with20 pts
- Starts at three stars. Add one if it rinses the mill automatically (with the brewing water), one if the maker states that it measures beans and water from the machine for the number of cups, and one for a timer. Subtract one if the body weighs 4.5 kg or more. Five at most, one at least.
Trust15 pts
- The reviews for the new machine across the top 30 Rakuten Ichiba listings when you search the model number, added together: 100 or more averaging 4.5 or higher is five stars, 100 or more four, 30 or more three, 10 or more two, fewer one.
Only here20 pts
- Starts at three stars. Add one or two where a figure or feature belongs to this model alone among the nine compared, and where it bears directly on the daily effort of brewing from beans, on choosing the taste, or on the number of cups.

What we dropped

Candidate	Verdict	Why
Toffy fully automatic custom-drip coffee maker with mill (K-CM9)	Runner-up (81/100)	81 points, more than four of the five, but it shares its cone mill and automatic bean dosing with the Siroca CM-6C271, which scored 88 and makes up to six cups to its five.
Siroca cone-mill fully automatic coffee maker, Cafe-bako PRO, stainless server (SC-C281)	Runner-up (77/100)	77 points, but it is the stainless-server version of the CM-6C271, which scored 88; at ¥31,800 it costs more and makes four cups to its six.
Twinbird fully automatic coffee maker, 6 cups (CM-D465)	Runner-up (76/100)	76 points and the largest capacity of the nine, but it shares its flat-burr mill and brewing temperatures with the CM-D457, which scored 80; at ¥32,200 and about 4.5 kg it costs and weighs more.
Zojirushi fully automatic coffee maker, Coffee Tsu, stainless server (EC-RT40)	Runner-up (67/100)	67 points; like the Panasonic NC-A58, which scored 73, it rinses its mill automatically, but it has 84 Rakuten reviews against the Panasonic’s 250.
Panasonic NC-A57	Held back	Meets the conditions at five cups (670 ml) with boiled, filtered water, but Rakuten Ichiba had only two new listings, at ¥34,040 and ¥37,060, the rest second-hand or parts (as of 26 October 2026). Too hard to compare on price.
Siroca SC-C261	Runner-up	The same Cafe-bako PRO as the CM-6C271 (cone mill, up to six cups), with a decaf course. The stainless filter is sold separately, and it has 18 reviews on Rakuten Ichiba.
Siroca SC-C112	Runner-up	A cone mill, stepless grind and 0.54 L of water at most, with seven new listings and 35 reviews on Rakuten Ichiba. We took the CM-6C271 from Siroca’s cone-mill models, so it would duplicate it.
Siroca SC-A372	Runner-up	A propeller mill, 0.55 L of water at most and a stainless server, with 362 reviews on Rakuten Ichiba. It duplicates the SC-A271, the cheaper propeller-mill model.
Siroca SC-A352	Runner-up	A propeller mill, 0.55 L of water at most and a glass server. 503 reviews on Rakuten Ichiba, but averaging 4.10, and it duplicates the SC-A271 (averaging 4.24).
Zojirushi EC-SA40	Runner-up	The glass-carafe version of the EC-RT40 (540 mL, with keep-warm that switches off after two hours, or none). 36 reviews on Rakuten Ichiba.
Melitta AFT1022-1B	Runner-up	Ten cups (about 1,100 ml at most) into a stainless pot, with no keep-warm. Only 10 reviews on Rakuten Ichiba.
Iris Ohyama BLIAC-A600-B	Runner-up	Cheap among those we compared, at ¥9,180 on Rakuten Ichiba, but no mill type is published and the grind is coarse or medium only. Its Rakuten review average is 3.97.
Zojirushi EC-CD40	Outside the theme	A coffee maker with a mill, but the official page does not say it is fully automatic from grinding to brewing (condition 1).
Toffy K-CM7	Outside the theme	Fully automatic from grinding to drip, but made for one cup (about 160 ml), with a 200 ml water tank (condition 2).

Questions visitors ask

Which should I choose if I can’t decide?

The Siroca Cafe-bako PRO cone-mill coffee maker (CM-6C271). It scored 88 points across the five criteria, the highest of the five.

Which is the cheapest of the five?

The Siroca fully automatic coffee maker (SC-A271), at a typical street price of about ¥12,300 including tax, as of 25 October 2026.

How current are the prices?

They are guide prices checked on the makers’ sites and Rakuten Ichiba as of 25 October 2026. They move with campaigns and stock, so check the linked page before you buy.

Where can I buy one?

All five are sold new on Rakuten Ichiba, and the links above go straight to a listing. Rakuten generally ships within Japan only, so these suit a home in Japan.

Which makes the most coffee at once?

Of the nine we compared, the Twinbird CM-D465, at up to 900 ml (six cups). The Siroca CM-6C271 makes up to six coffee cups of 120 ml (0.83 L of water at most), and the Melitta AFG622-1B about 600 ml at most (six cups). The smallest is the Twinbird CM-D457, at 450 ml (three cups).

What is the difference between cone, flat-burr and propeller mills?

The shape of the blades that grind the beans. Siroca describes its cone mill as generating little friction heat, and Twinbird says its slow flat-burr mill keeps friction heat down and grinds to an even size. Siroca’s propeller-mill SC-A271 has a single medium-fine grind and changes the amount ground in four steps for the number of cups. The Panasonic NC-A58 and Zojirushi EC-RT40 do not publish their mill type; you swap mesh (grind) filters to get two grinds.

Which is easiest to keep clean?

Two clean their mill automatically: the Panasonic NC-A58, which showers the mill before the bloom, and the Zojirushi EC-RT40, whose mill-clean structure flushes grounds from the mill case with the brewing water. The Siroca CM-6C271’s basket comes out whole for washing, and it has a mill-care mode and a cleaning mode. The Twinbird CM-D457’s mill comes out of the body for brushing, and it has three maintenance modes.

Which have a timer?

Of the nine we compared, five: the Siroca CM-6C271, SC-C281 and SC-A271, the Toffy K-CM9 and the Melitta AFG622-1B. The official pages of the Twinbird CM-D457 and CM-D465, the Panasonic NC-A58 and the Zojirushi EC-RT40 list no timer.

Do I need paper filters?

It depends on the model. The Siroca SC-A271 has a mesh filter and brews without paper. The Siroca CM-6C271 comes with a stainless filter and also takes ordinary paper filters. The Twinbird CM-D457 and Panasonic NC-A58 use paper filters, and paper filters come in the box. The Melitta AFG622-1B takes Melitta 1×2 filter papers, and only a brush is included.

Changes

2026-10-25　First published. Scored from 19 candidates.