Best dehumidifier for Japan: the 衣類乾燥除湿機 from Corona, Panasonic, Sharp and Mitsubishi compared on the 50 Hz and 60 Hz figures each maker prints

The largest tatami number on the box is the reinforced-concrete (鉄筋) one, and a wooden house gets roughly half of it: 16 against 32 tatami for the Panasonic F-YEX120B at 60 Hz, 23 against 45 for the Mitsubishi MJ-P180ZX.

How was this shortlist built?

Every figure on this page is a manufacturer’s published specification, read on 2026-09-30 from the Japanese spec page named beside it. Nothing was run, measured or tested by this site. Each Amazon Japan link is a search on the exact model number, because OwnerSpec’s product API cannot query that store.

The models were compared on dehumidification method, rated litres per day at 50 Hz and 60 Hz with the test condition printed beside them, applicable area in tatami for wooden and concrete construction, watts, tank, weight, and the clothes-drying minutes each maker prints with its own test conditions.

Three gaps are stated rather than filled. Iris Ohyama’s site returned 403 to every request, so no IJD or DCE model appears. Sharp’s page for the CV-P120 says production has ended. Panasonic’s F-YHVX120 has a live spec page (9.0/10.0 L/day, 11/13 wooden tatami) but is absent from Panasonic’s current comparison page, so it is treated as last year’s stock.

Why does the box print two capacities and two tatami numbers?

Eastern Japan runs 50 Hz mains and western Japan 60 Hz, and every maker here prints a capacity for each. Corona’s CD-WH1826 is 16.0 L/day at 50 Hz and 18.0 at 60 Hz; Mitsubishi’s MJ-P180ZX is 15.5 and 18. The applicable area moves with it: read the column for your grid, not the larger one.

The applicable area is a calculated value, not a measured one. Mitsubishi’s spec footnote attributes its figures to JEM 1411, which JEMA describes as the method, based on JIS C 9617, for deriving a room’s dehumidified area from the rated capacity for use in manuals and catalogues.

Wooden (木造) and reinforced-concrete (鉄筋) figures differ because of airtightness: Panasonic’s selection guide says a wooden home needs a higher capacity for the same floor than a steel-framed one. Its table puts 8.0 to 11.0 L/day at 10 to 14 wooden tatami but 20 to 28 concrete tatami.

Panasonic’s guide also settles the type question. The compressor type is for the hot, humid stretch from tsuyu through summer; the desiccant type holds its performance when the temperature is low; the hybrid switches between them to run all year.

How do the units compare on paper?

Manufacturer figures, 50 Hz / 60 Hz. “Not printed” means the page opened carries no value. The rated-litres condition is 27 C and 60 % where shown; Panasonic prints none beside its rated figure.

Sharp’s area line reads 木造〜コンクリート as one range, so its wooden and concrete columns are its two ends. Panasonic labels its concrete column 鉄筋 and also prints a プレハブ (prefab) figure, omitted here.

Corona CD-WH1826 and CD-WH1226: buy it or skip it?

Buy the Corona CD-WH1826 if the job is tsuyu and summer: a family’s laundry on the indoor pole, a whole floor of a wooden house at 20 or 23 tatami. Corona’s lineup page prints 16.0/18.0 L/day at 27 C and 60 %, 305/355 W while dehumidifying, a 5.5 L tank, the largest here, and single-phase 100 V. Its top page claims about 58 minutes for 2 kg on the JEMA-HD090:2017 test at 60 Hz, the shortest compressor figure on this page.

The flaw is the method. Corona’s WH units are compressor type with a heater, and Panasonic’s guide places the compressor type in the hot, humid season; Corona’s page prints no low-temperature capacity. Skip it if the main use is January drying in an unheated room. The CD-WH1226 is the same chassis at 11.0/12.0 L/day, 14/15 wooden tatami and about 69 minutes, for a smaller flat.

Panasonic F-YEX120B and F-YEX200D: buy it or skip it?

Buy the Panasonic F-YEX120B if the dehumidifier runs every month. Panasonic’s spec page prints its eco-hybrid method (エコ・ハイブリッド方式), 10.5 L/day at 205 W on 50 Hz and 12.5 L/day at 225 W on 60 Hz, 13 or 16 wooden tatami, a 3.2 L tank, 13.0 kg and 90 minutes of drying in both speed and standard modes, with nanoe X 48 trillion named as a feature. Panasonic’s guide is the reason: the hybrid switches methods to run all year.

The flaw is that Panasonic prints no room condition beside the rated litres, so the 12.5 cannot be set against Corona’s 18.0 at 27 C 60 % on equal terms, and its 3.2 L tank holds about six hours of output at the rated 12.5 L/day. Skip it if summer is the only problem: the Corona does more litres for the same wooden floor.

The F-YEX200D is the same method scaled up: 18.5/20.0 L/day, 23/25 wooden tatami, a 5.0 L tank, 16.3 kg and 70 to 87 minutes by mode. It is the pick for a whole wooden house that dries indoors in every season.

Sharp CV-UH160: buy it or skip it?

Buy the Sharp CV-UH160 if drying speed in both seasons is the point. Sharp’s press release for the HYBRID365, released 12 March 2026, prints about 54 minutes for 2 kg in rainy-season conditions (20 C, 70 %) and about 70 minutes in winter conditions (10 C, 70 %), both at 60 Hz in a 6-tatami room, plus a 38 dB night-drying mode against 43 dB at full speed. Its spec page adds 12.5/15 L/day rated, 16 to 32 tatami at 50 Hz and 19 to 38 at 60 Hz, a 4.0 L tank and about 16.2 kg. Plasmacluster 25000 is named as a feature.

The flaw is the drying wattage: 680/705 W in speed mode, more than double the 305/355 W Corona prints for dehumidifying, and Sharp’s spec page prints no supply voltage. Skip it if the unit will run unattended all day rather than for a timed load.

Sharp’s CV-U190 is the compressor alternative: 16.5/18.5 L/day at 27 C 60 %, 21/23 wooden tatami, a 4.5 L tank, about 74 minutes.

Mitsubishi MJ-P180ZX: buy it or skip it?

Buy the Mitsubishi MJ-P180ZX Sarari Pro if the home is a large concrete apartment on 60 Hz mains, where its page prints up to 45 tatami (75 m2). Mitsubishi’s spec page is the most complete here: compressor type, single-phase 100 V 50/60 Hz, 15.5/18 L/day at 27 C and 60 % RH, 330/390 W, about 4.7 L tank, 15.2 kg, and the applicable area attributed to JEM 1411.

The flaw is the drying figure: about 114 minutes for 2 kg at 20 C 70 % and 60 Hz, the longest on this page on the same test conditions Corona and Sharp use. Skip it if laundry speed is the reason for buying.

What about the small units?

The Sharp CV-U60 is the only desiccant on Sharp’s current lineup: 5.4/5.6 L/day at 27 C 60 %, the same 7 to 14 tatami at both frequencies, about 1.5 L tank and about 6.7 kg. Its 510/570 W, higher than any compressor here, is the desiccant trade-off for a printed 10 C drying time of about 109 minutes.

Panasonic’s comparison page lists the F-YEX90D at 8.5 L/day (60 Hz), a 2.4 L tank and 9.7 kg; its own spec page was not opened, so it stays out of the table.

What goes wrong?

The wrong frequency column. The same Corona CD-WH1826 is 16.0 L/day and 20 wooden tatami at 50 Hz, 18.0 and 23 at 60 Hz. A 50 Hz buyer who sized from the 60 Hz column has less unit than planned.

The concrete number in a wooden house. Panasonic’s guide says the wooden figure is the one that applies when airtightness is low, and it is about half: 13 against 27 tatami for the F-YEX120B at 50 Hz.

A compressor in a cold room. Panasonic places the compressor type in the hot, humid season and the desiccant type in low temperatures. Corona’s and Mitsubishi’s pages print capacity only at 27 C and 60 %, so their winter output is simply not published.

A tank that stops the run. Every unit stops when the tank is full. The Sharp CV-U60’s 1.5 L and the Panasonic F-YEX120B’s 3.2 L are overnight tanks at their rated litres; Sharp’s CV-UH160 page prints continuous-drain support (連続排水対応) beside its 4.0 L tank.

Frequently asked questions

Sources

1. Corona, WH series clothes-drying dehumidifier lineup (CD-WH1826, CD-WH1226) (manufacturer or vendor document)
2. Corona, WH series top page (58-minute drying claim and its JEMA-HD090:2017 footnote) (manufacturer or vendor document)
3. Panasonic, F-YEX120B specifications (manufacturer or vendor document)
4. Panasonic, F-YEX200D specifications (manufacturer or vendor document)
5. Panasonic, clothes-drying dehumidifier comparison page (manufacturer or vendor document)
6. Panasonic, F-YHVX120 specifications (manufacturer or vendor document)
7. Panasonic, how to choose a dehumidifier (selection guide) (manufacturer or vendor document)
8. Panasonic, cooling versus dry mode on an air conditioner (manufacturer or vendor document)
9. Sharp, CV-UH160 specifications (manufacturer or vendor document)
10. Sharp, press release for the HYBRID365 CV-UH160 (manufacturer or vendor document)
11. Sharp, CV-U190 specifications (manufacturer or vendor document)
12. Sharp, CV-U60 specifications (manufacturer or vendor document)
13. Sharp, dehumidifier lineup index (manufacturer or vendor document)
14. Sharp, CV-P120 product page (production ended) (manufacturer or vendor document)
15. Mitsubishi Electric, MJ-P180ZX specifications (manufacturer or vendor document)
16. JEMA, JEM 1411 calculation method for the dehumidified area of electric dehumidifiers (manufacturer or vendor document)