Best Dehumidifiers in Japan 2026: Stop Condensation & Mold

This article contains promotional / affiliate links.

If you have spent a winter in a Japanese apartment, you may know the routine: the window is streaming with water every morning, the frame sits in a puddle, and black spots of mold creep into the corners. Dry your laundry indoors and it gets worse. The Japanese word is ketsuro (結露), condensation, and a dehumidifier (除湿機, joshitsuki) is the most direct fix.

The catch: the compressor type, the mainstream design in Japanese shops, loses much of its power in a cold room. This guide compares six current models using the makers’ own winter test figures, kakaku.com prices as of September 2026 and running costs at the 31 yen/kWh guideline, and explains the tenant rules on condensation mold.

Why your windows drip in winter

Warm air holds more water vapor than cold air. When room air touches a surface colder than its dew point, the vapor turns back into water, and on a winter night the coldest surface is usually the window glass and its metal frame. Breathing, cooking, baths and indoor laundry keep adding moisture.

Standard Magnus dew-point formula.

At 20°C and 60% humidity, glass below about 12°C drips; at 45–50% it has to fall below roughly 8–9°C first. That margin is what a dehumidifier buys you, and it is why running a humidifier flat out next to cold windows backfires.

How to choose a dehumidifier for a Japanese apartment

1. Compressor, desiccant or hybrid?

Panasonic’s buying guide recommends the desiccant type for winter condensation and indoor drying in winter, and the compressor type for the humid rainy season and summer; Sharp’s FAQ agrees. Mitsubishi Electric explains why: in a cold room the chilled coil frosts up. Its MJ-P180ZX is rated at 18 L/day at 27°C (60 Hz) but removes 5.0 L/day at 10°C in winter mode, and 2.0 L/day or less at 1°C. Minimum room temperatures matter too: about 5°C for Corona’s 2026 compressors and 7°C for Mitsubishi’s MJ-M120ZX, against 0–1°C for the desiccant and hybrid models below.

2. Size it in liters per day

Capacity is rated at 27°C and 60% humidity (some desiccants at 20°C). Most models list two figures: one for eastern Japan’s 50 Hz power and a higher one for western Japan’s 60 Hz (the line runs roughly along the Fuji River in Shizuoka). Panasonic’s guide matches capacity to room size like this, and counts about 1.5 kg as one person’s daily laundry:

A single person or couple is well served by 5–8 L/day; a family should look at 12 L/day or more.

3. Compare winter drying times

Drying claims use an industry test (JEMA-HD090): 2 kg of laundry in a 6-tatami room at 20°C and 70% humidity, on 60 Hz. Sharp and Panasonic also publish a 10°C “winter” result, which is the figure to compare if your apartment is cold: about 70 minutes for Sharp’s hybrid CV-UH160, 109 for its desiccant CV-U60 and 135 for Panasonic’s F-YEX120B. Mitsubishi, Corona and Iris Ohyama do not publish one for these models.

4. Work out the running cost

Japanese spec sheets use a guideline price of 31 yen per kWh (tax included), set by the home appliance fair-trade council (家電公取協) and unchanged since July 2022. The math: watts × hours ÷ 1,000 × 31. Eight hours a night for 30 nights costs about ¥1,674 for a 225 W model and ¥4,241 for a 570 W desiccant. Auto modes can use less: in Corona’s own eight-hour test, auto mode used about 40% less than standard mode.

The 6 best dehumidifiers for Japanese apartments in 2026

All six are on sale in Japan now. Prices are kakaku.com’s lowest on 26 September 2026 unless stated.

1. Sharp HYBRID365 CV-UH160 — best overall for winter and laundry

Sharp’s 2026 flagship pairs a compressor for the warm months with a desiccant for the cold, switching a heater on or off by room temperature and mode. It posts the fastest winter figure here: about 70 minutes for 2 kg at 10°C, and 54 in rainy-season conditions. It is also quieter than last year’s model: 43 dB, or 38 dB in night-dry mode. The price of speed is 705 W in speed-dry mode, about ¥25 per winter load on Sharp’s figures.

Cheaper option: the 2025 CV-TH150 hybrid (about 57 and 75 minutes, 49 dB) still sells for about ¥44,800.

Cheaper CV-TH150:

2. Panasonic F-YEX120B — the cheapest per load of laundry

Panasonic’s whole current dehumidifier range uses its Eco Hybrid system. Despite the name there is no desiccant: the F-YEX120B dries the air twice, on a compressor coil and then on an air-cooled heat exchanger. The payoff is efficiency: 225 W for 12.5 L/day, and roughly ¥10 per 2 kg load (¥13 at 10°C) on Panasonic’s figures. The catch is speed in the cold, at about 135 minutes. Siblings: the compact F-YEX90D (about ¥54,450) and the family-size F-YEX200D.

3. Mitsubishi Electric MJ-P180ZX — big capacity, with a winter mode

Mitsubishi Electric tackles the compressor’s winter problem head-on: the MJ-P180ZX, released in May 2026, has a winter mode that raises the fan speed and an automatic defrost for the frosted coil, and runs from 1°C. Be realistic, though: Mitsubishi quotes 5.0 L/day at 10°C against 18 L/day at 27°C. In warm weather it has the most capacity here, and it dries 2 kg in about 114 minutes at 20°C. It adds a 40–70% humidity setting, and Mitsubishi says its dehumidifiers are designed and made in Japan.

4. Sharp CV-U60 — compact desiccant for cold bedrooms

For one cold bedroom or a small 1K, a desiccant is the simplest fix. Sharp’s 2026 CV-U60 sits under a drying rack and blows up into the laundry, and the cold hardly slows it: about 99 minutes for 2 kg at 20°C and 109 at 10°C. The costs are 570 W (60 Hz), about ¥32 per winter load, and a 1.5 L tank with no hose drainage. Its 2025 predecessor, the CV-T60, is listed with the same drying times at about ¥23,000.

5. Iris Ohyama IJD-I50 — budget desiccant with a circulator

The cheapest model here combines a 5.0 L/day desiccant with a full circulator whose head oscillates through up to 90 degrees to sweep a whole rack. Iris says its heater design dehumidifies even in the cold season, and it is rated from 0°C. It is thirsty, though, at 590 W (about ¥18 an hour), Iris’s official shop page gives no drying time or noise figure, and it is an older design, listed on kakaku.com since 2019.

6. Corona CD-S6326 — slim budget pick for the rainy season

Fifth in kakaku.com’s dehumidifier popularity ranking on 26 September 2026, Corona’s slim compressor is 17 cm wide, draws 180 / 205 W and holds 3.0 L. Corona puts a 2 kg load at about 136 minutes and 553 Wh (about ¥17) at 20°C. The warning: Corona’s 2026 models are all compressors rated from about 5°C, and this one has no winter mode. Use it in heated rooms, washrooms and the rainy season.

Comparison and running costs

* At the rated power shown and 31 yen/kWh; auto modes use less. Drying times are the makers’ JEMA-HD090 figures; “—” means not published. Prices: kakaku.com lowest, 26 September 2026.

Condensation tips and your deposit

Put the machine where the water is

Run it in the bedroom overnight with the door closed, and dry laundry in the smallest room you can close off, airflow aimed at the clothes, as the maker tests do (about 6 tatami). Our laundry guide covers detergents and racks.

Wipe, report, keep a record

The land ministry (MLIT) says in its rental restoration guidelines that condensation is often the building’s structural problem, but mold that spread because the tenant neither told the landlord nor wiped it off is likely to be judged beyond normal wear, meaning the tenant pays. Its case collection includes a 2005 Hirakata Summary Court ruling that cleared a tenant who had wiped condensation whenever they noticed it. Wipe the glass each morning, report heavy condensation in writing and keep dated photos. See also our guide to renting an apartment in Japan.

Hoses, voltage and disposal

If you drain through a hose, keep it away from anywhere below freezing (Corona’s warning). All six run on Japan’s 100 V at 50 or 60 Hz; abroad you would need a step-down transformer. Dehumidifiers are not covered by the home appliance recycling law, but compressor models contain refrigerant (Corona), so follow your city’s disposal rules.

Where to buy

All six are sold online in Japan, though Amazon.co.jp stock varies by model; chains carry them too: Bic Camera listed the CV-UH160 at ¥67,800. Makers’ own shops cost more: Sharp’s COCORO STORE charged ¥84,800. Amazon’s Prime Kanshasai sale for Prime members runs 16–19 October 2026 (pre-sale 13–15 October); Amazon has not said which dehumidifiers will be discounted.

Frequently asked questions

What type of dehumidifier is best for winter condensation in Japan?

A desiccant or a hybrid. Panasonic’s buying guide recommends desiccants for winter condensation and winter indoor drying because they stay stable in the cold; hybrids add a compressor for speed all year. In Sharp’s 10°C tests its hybrid CV-UH160 dried 2 kg of laundry in about 70 minutes, its desiccant CV-U60 in about 109.

Do compressor dehumidifiers work in winter?

Yes, but with much less capacity, because the cooling coil frosts up in a cold room. Mitsubishi Electric’s MJ-P180ZX, rated at 18 L/day at 27°C, removes about 5.0 L/day at 10°C in winter mode and 2.0 L/day or less at 1°C.

How much does it cost to run a dehumidifier in Japan?

Watts × hours ÷ 1,000 × 31 yen, the guideline price per kWh on Japanese spec sheets. Eight hours a night for a month is about ¥1,674 at 225 W and about ¥4,241 at 570 W.

Can a dehumidifier dry laundry indoors in winter?

Yes. In the industry’s 10°C test with 2 kg of laundry, Sharp’s CV-UH160 takes about 70 minutes, the CV-U60 about 109 and Panasonic’s F-YEX120B about 135. Use a small closed room with the airflow aimed at the clothes.

Will condensation mold come out of my deposit?

It can. MLIT’s guidelines say condensation is often a structural problem of the building, but mold that spread because the tenant neither told the landlord nor wiped it off is likely to be judged beyond normal wear. Wipe windows regularly, report heavy condensation in writing and keep dated photos.

The short version

Cold apartment, indoor laundry: buy a hybrid or a desiccant, not a plain compressor. The Sharp CV-UH160 is the fastest winter dryer here and the Sharp CV-U60 the compact cold-bedroom pick at about ¥29,000. The Panasonic F-YEX120B dries a load for the least electricity, the Mitsubishi MJ-P180ZX the big Japan-made compressor with a winter mode, the Iris Ohyama IJD-I50 the budget desiccant and the Corona CD-S6326 a rainy-season bargain. Whatever you buy, run it where the water appears, wipe the glass and tell your landlord.