Slim robot vacuums in Japan: 5 that fit under the bed, from ¥29,990

Five robot vacuums in Japan, 7.2 to 9.2 cm tall, for under beds and sofas
ECOVACS washes and dries its own mops; the Eufy C10 does not mop
Docks range from an 8.6 cm-deep stand to a 53.3 cm-high mop-washing station

The five

Best for	Where to get it	Score	Street price, incl. tax
The slimmest at 7.2 cm, with a dock only 21 cm high — if you can’t decide	Anker Eufy Robot Vacuum Auto-Empty C10 (T2292) See price	87/100	¥29,990 (street price)
81 mm tall, and it washes and dries its own mops in hot water	ECOVACS DEEBOT T50 OMNI See price	84/100	¥99,800 (official price)
24.8 cm across, a 4 L bag that lasts about 90 days, under ¥40,000	SwitchBot K11+ robot vacuum (W3003100 / W3003101) See price	78/100	¥37,800 (street price)
8.3 cm tall with a water tank, and a dock smaller than A4	Tapo RV20 Max Plus robot vacuum with auto-empty dock See price	73/100	¥52,900 (street price)
A charging stand just 8.6 cm deep — the smallest footprint of all	iRobot Roomba Mini Slim vacuum and mop + SlimCharge charging stand (F115260) See price	70/100	¥39,800 (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.

The slimmest at 7.2 cm, with a dock only 21 cm high

Anker Eufy Robot Vacuum Auto-Empty C10 (T2292)

Maps the room with a laser as it goes; the app sets no-go zones
Dock sucks the dust into a bag, emptied about once every two months

See today’s price on Rakuten→

Why it made the five

About 7.2 cm tall — it gets under even low beds and sofas
A dock about 21.2 cm high that fits under a shelf or between furniture
A side brush that reaches out into corners, and a brush designed to tangle less hair
Right for: Cleaning under the lowest furniture, or keeping the budget around ¥30,000.
Not for: Wanting the robot to mop as well.
Worth knowing: It does not mop. No obstacle avoidance is listed, so pick up cables and small things from the floor first. Wi-Fi is 2.4 GHz only.

Score breakdown — 87/100

Criterion	Stars	Why
Quality	★★★★☆	About 7.2 cm tall earns five stars; suction of up to 4,000 Pa is under 5,000 Pa, so one comes off
Value for money	★★★★★	¥29,990, the lowest on Rakuten (Anker Direct’s Rakuten store), is under ¥40,000 and earns five
Easy to live with	★★★☆☆	From two, self-emptying (about two months between emptying) adds one. It does not mop. The dock covers 27.5 × 19.1 cm, about 0.05 m², so nothing comes off
Trust	★★★★★	781 reviews averaging 4.52 on the Rakuten listings for the unit (26 October 2026) — 500 or more at 4.5 or higher earns five
Only here	★★★★★	The only one of the eight with both the lowest body (about 7.2 cm) and the lowest self-emptying dock (about 21.2 cm high) — two points

81 mm tall, and it washes and dries its own mops in hot water

ECOVACS DEEBOT T50 OMNI

Station handles emptying as well as washing and drying the mops
Suction 15,000 Pa

See today’s price on Rakuten→

Why it made the five

81 mm tall, made slim by a dToF LiDAR module
Two rotating mops, washed by the station in 70°C water and dried with 45°C air
Up to 225 minutes and about 200 m² in one run on quiet mode
Right for: A couple who want even the mop-washing done for them.
Not for: A one-room flat with no floor to spare for the station.
Worth knowing: The station is 350 × 477 × 533 mm. You still fill the clean-water tank and empty the dirty-water tank by hand. There is no automatic detergent dispenser; if you use cleaning solution, add it to the clean-water tank. The price shown is ECOVACS’s own site, checked on 26 October 2026; the official Rakuten store lists ¥129,800 (¥54,800 with a coupon valid until 27 October).

Score breakdown — 84/100

Criterion	Stars	Why
Quality	★★★★★	81 mm tall earns four stars; 15,000 Pa of suction adds one
Value for money	★★☆☆☆	¥99,800 on ECOVACS’s own site (the official Rakuten store is dearer at ¥129,800) falls in ¥70,000–¥100,000 and earns two
Easy to live with	★★★★☆	From two, self-emptying (3 L) adds one, mopping with rotating pads one, and washing the mops in 70°C water and drying them with 45°C air one. The station covers 35 × 47.7 cm, about 0.17 m², so one comes off
Trust	★★★★★	1,590 reviews averaging 4.55 on the Rakuten listings for the unit (26 October 2026) — 500 or more at 4.5 or higher earns five
Only here	★★★★★	The only one of the eight with a station that washes and dries the mops, and its 81 mm body is the second lowest — two points

24.8 cm across, a 4 L bag that lasts about 90 days, under ¥40,000

SwitchBot K11+ robot vacuum (W3003100 / W3003101)

Up to 6,000 Pa of suction
App cleans room by room and sets no-go zones
Dock 25 cm high and 18 cm wide
578 Rakuten reviews

See today’s price on Rakuten→

Why it made the five

A small body, 24.8 cm across and 9.2 cm tall
LDS laser mapping and 360° obstacle avoidance
45 dB or less in use, and a 4 L bag that lasts about 90 days
Right for: Getting a small robot that rarely needs emptying, for under ¥40,000.
Not for: Homes with lots of deep-pile rugs, where suction counts (the K11+ Pro above it has 12,000 Pa).
Worth knowing: Mopping is with a disposable sheet clipped on; there is no water tank. Being small, it takes longer to clean a large room.

Score breakdown — 78/100

Criterion	Stars	Why
Quality	★★★☆☆	92 mm tall earns three stars; up to 6,000 Pa of suction adds and takes away nothing
Value for money	★★★★★	¥37,800, the lowest on Rakuten (SwitchBot’s own store), is under ¥40,000 and earns five
Easy to live with	★★★★☆	From two, self-emptying (a 4 L bag, about 90 days) adds one, and mopping with a disposable sheet one. The dock covers 24 × 18 cm, about 0.04 m², so nothing comes off
Trust	★★★★★	578 reviews averaging 4.63 on the Rakuten listings for the unit (26 October 2026) — 500 or more at 4.5 or higher earns five
Only here	★★★☆☆	Its 24.8 cm body, 4 L bag and about 90 days are shared with the K11+ Pro in the same series, so nothing is added

8.3 cm tall with a water tank, and a dock smaller than A4

Tapo RV20 Max Plus robot vacuum with auto-empty dock

Sits lower than turret-topped LiDAR robots, so it keeps mapping under a bed or sofa
Suction 5,300 Pa

See today’s price on Rakuten→

Why it made the five

8.3 cm tall, with a slim MagSlim LiDAR that keeps its position under low furniture
Mopping from a 300 mL tank at three water levels, avoiding carpet
A 228 × 164 mm dock with a 3 L bag, about two months between emptying
Right for: Wanting both a slim robot and mopping, with a small dock.
Not for: Wanting the mop washed automatically too — you wash it by hand.
Worth knowing: The mopping cloth is washed by hand. Noise on quiet mode is 52 dB.

Score breakdown — 73/100

Criterion	Stars	Why
Quality	★★★★☆	83 mm tall earns four stars; 5,300 Pa of suction adds and takes away nothing
Value for money	★★★☆☆	¥52,900, the lowest on Rakuten (TP-Link Direct’s Rakuten store), falls in ¥50,000–¥70,000 and earns three
Easy to live with	★★★★☆	From two, self-emptying (a 3 L bag, about two months) adds one, and mopping from a water tank one. The dock covers 22.8 × 16.4 cm, about 0.04 m², so nothing comes off
Trust	★★★☆☆	151 reviews averaging 4.60 on the Rakuten listings for the unit (26 October 2026) — 100 or more earns three
Only here	★★★★☆	Of the six self-emptying models whose dock covers 0.1 m² or less, the only one that mops from a water tank (300 mL, three levels) — one point

A charging stand just 8.6 cm deep — the smallest footprint of all

iRobot Roomba Mini Slim vacuum and mop + SlimCharge charging stand (F115260)

Sold with a slim charging stand in place of the self-emptying dock
ClearView LiDAR maps the room
You empty the dust bin on the robot yourself

See today’s price on Rakuten→

Why it made the five

The same body as the Roomba Mini, 24.5 cm wide and 9.2 cm tall
A charging stand 8.6 cm deep, 22.2 cm wide and 12.3 cm high, against the wall or under furniture
LiDAR mapping for room-by-room cleaning and no-go zones
Right for: Taking up the least possible space, and not minding emptying it yourself.
Not for: Wanting the robot to empty itself.
Worth knowing: It does not empty itself. Suction is not published in pascals. Mopping is with a disposable pad clipped on.

Score breakdown — 70/100

Criterion	Stars	Why
Quality	★★☆☆☆	9.2 cm tall earns three stars; suction is not published in pascals (only “up to 70 times” the Roomba 600 series), so one comes off
Value for money	★★★★★	¥39,800, the lowest on Rakuten (iRobot’s official Rakuten store and Rakuten Bic), is under ¥40,000 and earns five
Easy to live with	★★★☆☆	From two, mopping with a disposable pad adds one. It does not empty itself; you empty the bin on the robot. The stand covers 8.6 × 22.2 cm, about 0.02 m², so nothing comes off
Trust	★★★★☆	536 reviews averaging 4.42 on the Rakuten listings for the unit (26 October 2026) — 500 or more, but below 4.5, so the four for 300 or more
Only here	★★★★☆	The only one of the eight whose charging stand is just 8.6 cm deep and sits flat against the wall — one point

Know before you buy

Measure the gap from the floor to the underside of the furniture, not the height of its legs. All five here are 9.5 cm or lower; the slimmest, Eufy’s Auto-Empty C10, is about 7.2 cm, and the SwitchBot and Roomba Mini bodies are 9.2 cm.
Suction is the makers’ own figure in pascals, and each maker measures it differently, so treat it as a guide. iRobot publishes no pascal figure at all — only “up to 70 times” the Roomba 600 series.
The dock can matter more than the robot in one room. It ranges from an 8.6 × 22.2 cm charging stand to a 35 × 47.7 × 53.3 cm station that washes and dries the mops.
“Mopping” means three different things here: a disposable sheet or pad clipped on (SwitchBot, Roomba Mini), a 300 mL water tank (Tapo), or two rotating mops washed in 70°C water and dried with 45°C air by the station (ECOVACS). Eufy’s C10 does not mop.
With a self-emptying dock, the makers estimate you empty the bag about every two to three months: about 90 days for the SwitchBot K11+ and Roomba Mini + AutoEmpty, about 70 days for the K10+ Pro Combo and about two months for the Eufy and Tapo.
Roborock is absent: the Qrevo Curv 2 Pro had no Rakuten reviews yet, the Qrevo Edge 2 was not sold new on Rakuten, and the Saros 10R is ¥159,800.

How we chose: theme, conditions, scoring

How we chose

Candidates: 69
Met every condition below: 10
Kept: five, each the best at something different

Conditions (all of them, not most of them)

A published body height of 9.5 cm or less — it gets under a bed or sofa with a 10 cm gap
It maps the room, and the app lets you set no-go zones and choose where to clean
It empties itself into a dock, or it mops, or both
¥100,000 or less, on the maker’s own site or new from a major electronics chain or the maker’s own store on Rakuten Ichiba (before coupons)
Sold as a current model on the maker’s own site, and buyable new on Rakuten Ichiba

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 published body height: 8.0 cm or less five stars, 8.1–8.9 cm four, 9.0–9.5 cm three. Add one if the published suction is 10,000 Pa or more; subtract one if it is under 5,000 Pa or not published in pascals (within one to five stars).
Value for money20 pts
- The lowest new price from a major electronics chain or the maker’s own store on Rakuten Ichiba, before coupons (or the maker’s own site if that is cheaper). Under ¥40,000 is five stars, ¥40,000 to under ¥50,000 four, ¥50,000 to under ¥70,000 three, ¥70,000 to ¥100,000 two.
Easy to live with20 pts
- Starts at two stars. Add one for self-emptying, one for mopping (a water tank, or disposable sheets or pads), and one if the dock also washes and dries the mop for you. Subtract one if the dock’s footprint (official width × depth) is over 0.1 m² and takes up a lot of floor.
Trust15 pts
- Review counts added up across the Rakuten Ichiba listings for the unit itself: 500 or more averaging 4.5 or higher is five stars, 300 or more four, 100 or more three, 30 or more two, under 30 one.
Only here20 pts
- Starts at three stars. Add one or two where a figure or mechanism belongs to this model alone among the eight compared, and where it bears directly on living with it in a small flat — under furniture, where the dock goes, emptying, mopping.

What we dropped

Candidate	Verdict	Why
SwitchBot K11+ Pro robot vacuum (W3004100 / W3004101)	Runner-up (74/100)	74 points, but only 52 Rakuten reviews so far. It shares its 24.8 cm body, 4 L bag and about 90 days with the K11+, which is ¥37,800 against ¥46,512 with 578 reviews — choose the Pro if you want 12,000 Pa in that small body.
iRobot Roomba Mini vacuum and mop + AutoEmpty charging station (F155260)	Runner-up (70/100)	70 points, the same as the Roomba Mini Slim, with the same 24.5 cm body; among the small self-emptying models about 25 cm across, the SwitchBot K11+ scored higher (78) at ¥37,800 against ¥48,800.
SwitchBot K10+ Pro Combo robot vacuum (W3002501)	Runner-up (66/100)	66 points, the lowest of the eight: the robot itself has only 3,000 Pa of suction and it costs ¥54,910. It is the one to choose if you want a stick vacuum and a robot sharing one dock.
Roborock Qrevo Curv 2 Pro (QC2P02-04)	Held back	7.98 cm tall, 25,000 Pa and a fully automatic dock that washes the mops in 100°C water, so it meets every condition (¥98,780 at Matsuya Denki on Rakuten). But its Rakuten listings had no reviews yet, and the dock is 45 cm wide, 45 cm deep and 45 cm high.
ECOVACS DEEBOT X5 PRO OMNI	Held back	95 mm tall, 12,800 Pa and fully automatic with 70°C mop washing, so it meets every condition (¥68,500 on the official site). But the Rakuten listings for the unit had no reviews, and the station is 394 × 443 × 527.5 mm.
ECOVACS DEEBOT T50S OMNI	Outside the theme	81 mm tall with 25,000 Pa, but ¥109,800 on both ECOVACS’s own site and its official Rakuten store — over ¥100,000 (condition 4).
Roborock Qrevo Edge 2	Outside the theme	79.8 mm tall with 25,000 Pa, but we could find no new unit for sale on Rakuten (condition 5).
Roborock Saros 10R	Outside the theme	7.98 cm tall, but ¥159,800 at the official Rakuten store (condition 4).
Anker Eufy Robot Vacuum Omni S1 Pro	Outside the theme	About 9.6 cm tall, just over condition 1, and ¥199,900.
Anker Eufy RoboVac G30 Hybrid	Outside the theme	About 7.2 cm tall, but you cannot set cleaning areas or no-go zones on a map (condition 2).
Anker Eufy Robot Vacuum Omni C20	Outside the theme	About 8.5 cm tall with a fully automatic station, but discontinued on the official site (its successor, the Omni C28, is about 11.1 cm tall).
Roomba 105 Combo + AutoEmpty	Outside the theme	A body 10.4 cm tall, above condition 1.
Roborock Q7B+ / Q10P+	Outside the theme	A body 99 mm tall, above condition 1.
ECOVACS DEEBOT mini 2	Outside the theme	Small at 28.6 cm across, but 99.8 mm tall, above condition 1.
AIRROBO P20 and other low-priced overseas brands	Outside the theme	Plenty of Rakuten reviews, but we could not find a specification for Japan on the maker’s own site (condition 5).

Questions visitors ask

Which should I choose if I can’t decide?

The Anker Eufy Robot Vacuum Auto-Empty C10. It scored 87 points across the five criteria, the highest of the five.

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 in Tokyo?

All five are sold on Rakuten Ichiba, which ships within Japan, and the links above go straight to the listings. If you would rather see them in person, the big electronics chains — Yodobashi Camera, Bic Camera and Yamada Denki — carry robot vacuums from the major brands. They run on Japanese mains power, so they suit a home in Japan rather than a suitcase.

Which is the slimmest robot vacuum?

Of the eight we compared, the Anker Eufy Robot Vacuum Auto-Empty C10, at about 7.2 cm. Next come the ECOVACS DEEBOT T50 OMNI at 81 mm and the Tapo RV20 Max Plus at 83 mm. The SwitchBot K11+ series and the Roomba Mini are 9.2 cm. When you measure the gap under furniture, measure from the floor to the underside of the board, not the height of the legs.

My room is small. Where will the dock go?

The smallest footprint is the Roomba Mini Slim’s charging stand (8.6 cm deep by 22.2 cm wide), which does not empty the robot. Among self-emptying docks, the Roomba Mini + AutoEmpty (17.8 cm deep by 21.2 cm wide), the Tapo RV20 Max Plus (22.8 × 16.4 cm) and the SwitchBot K11+ and K11+ Pro (24 × 18 cm) are each about the size of an A4 sheet. The fully automatic DEEBOT T50 OMNI, which washes its mops, is 35 × 47.7 cm and 53.3 cm high, so decide where it goes first.

How often do I have to empty it?

By the makers’ estimates, about 90 days for the SwitchBot K11+ and K11+ Pro (a 4 L bag) and the Roomba Mini + AutoEmpty, about 70 days for the SwitchBot K10+ Pro Combo (3 L), and about two months for the Eufy Auto-Empty C10 and the Tapo RV20 Max Plus (3 L). It depends on the size of your home and whether you have pets.

How much of the mopping can it do?

The SwitchBot models and the Roomba Mini mop with a disposable sheet or pad clipped on. The Tapo RV20 Max Plus has a 300 mL water tank with three water levels. The DEEBOT T50 OMNI mops with two rotating pads, and its station washes them in 70°C water and dries them with 45°C air. The Eufy Auto-Empty C10 does not mop.

Why is there no Roborock here?

The Roborock Qrevo Curv 2 Pro meets every condition — 7.98 cm tall, 25,000 Pa and a dock that washes the mops in 100°C water, ¥98,780 at Matsuya Denki on Rakuten — but its Rakuten listings had no reviews yet, and the dock is 45 cm wide, deep and high. The Qrevo Edge 2 was not sold new on Rakuten, and the Saros 10R is ¥159,800 at the official Rakuten store.

Changes

2026-10-25　First published. Scored from 69 candidates.