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Stylish and compact humidifier

Enriched and softly moisturized

The STEM300 humidifier is a dignified and efficient humidifier that can be placed in any space in a neat and space-saving form. It is also designed to be easy to use, with quietness that makes it comfortable to use even at bedtime and a water supply at the top. The clean micro-mist gives a pleasantly moisturizing effect.

STEM means "stem" or "trunk" of a plant. The nutrients and moisture in the soil reach the entire plant through the stems. With this image, a soft moisture is spread throughout the room from the standing STEM. It will also gently deliver moisture to your mind as you watch it go.

Function01: Compact design that does not choose where to put it

Because it is compact, it can be placed on a shelf or table as well as on the floor. This compact design is ideal for bedside use and is layout-free and comfortable.

Function02: The largest tank capacity in cado history despite its compact size

The medium size is ideal for floor or side table use, yet the tank has a large capacity of approximately 3.5 liters. It can be used continuously for about 23 hours in weak mode operation.

Function03: Large opening for easy watering and cleaning

The opening at the top of the main body is large with a diameter of about 20cm, so it is easy to supply water. An antibacterial plate is installed in the aquarium. Just by pouring tap water, 99.9% or more of mold and bacteria (*1) are sterilized, so the maintenance is minimal.

*1 Measurement method: Japan Food Analysis Center; inhibition of bacteria by more than 99.9% in 24 hours according to JIS Z 2801 "Antimicrobial Processed Products - Antimicrobial Test Method and Antimicrobial Effect". The antimicrobial function of this product does not guarantee the development or suppression of all bacteria. The main unit requires regular maintenance.

Function04: Instead of lighting in the study or bedside

It also has the function of LED lighting. Three levels of illumination are adjustable. It can also be used as an indirect light or desk light in a study or bedside.

Function05: Easy to use at bedtime due to the high silence

Designed for use in bedrooms and children's rooms, the noise level is 33 dB, which is very quiet. In night mode, the lights in the tank can be turned off while running automatically, so it does not interfere with a good night's sleep.

Purio is the best for disinfecting air

Purio is a hypochlorous water optimized for humidification. Put Purio into the tank of your humidifier and fill it with water to disinfect the space. (It is recommended to dilute it up to 10 times.)

For more information about Purio, please see below.

Click here to purchase Purio

Product Details

Selling Agency Japan
  • Floor space: up to 18 m2 (prefabricated Western-style room 11 tatami mats) / up to 11 m2 (wooden Japanese-style room 7 tatami mats) *1
  • Amount of humidification: (Intermittent) approx. 50 mL/h / (Weak) approx. 150 mL/h / (Strong) approx. 300 mL/h / (Rapid) approx. 400 mL/h
  • Weight: Approx. 3.3 kg (not including water in the tank)
  • Sensor: Temperature sensor / Humidity sensor
  • Body color: Cool gray / White
  • LED sign: Humidity display / Various warning signs
  • Operation modes: Auto / Night mode / Intermittent / Weak / Strong / Rapid (2 hours)
  • Tank capacity: approx. 3.5L
  • Timer: 1H, 4H, 8H
  • Power: 100V 50/60Hz
  • Rated power consumption: (Intermittent) 7W/(Weak) 18W/(Strong) 26W/(Rapid) 34W
  • Body dimensions (including protruding parts): Diameter 210mm x height 354mm
  • Replacement cartridge: Filter cartridge (CT-C300)*2

Specifications and appearance are subject to change without notice for improvement.

*1 Calculated by the test method based on JEM1426 of the Japan Electrical Manufacturers' Association.

*2 Regular replacement is required. It takes about 3-6 months to replace it with ordinary tap water. However, depending on the conditions of use and the environment, the life of the filter may be even shorter.

Kindly Note

Purio and the replacement cartridge CT-C300 are sold separately.

Click here to purchase Purio
Click here to purchase the replacement cartridge CT-C300

・All the products handling in ALEXCIOUS are the genuine products from the original makers.
・The colors in the product photos may differ slightly from the actual product.
・The design, specifications, appearance, and price of products are subject to change without notice.

Humidifier STEM300


¥ 29,800
Approx. USD 200.98

Shipping Fee

¥ 10,100
(Approx. USD 68.12)
Gift wrapping available


    ¥ 29,800
    Domestic: Delivery in 8-9 business days.
    Overseas: It takes a few more days.


    ¥ 29,800
    Domestic: Delivery in 41-42 business days.
    Overseas: It takes a few more days.

Contact us


Guide for Ordering Procedures

Order Procedures

  1. 1
    Placing an Order

    Orders can be made anytime.

  2. 2
    Confirmation Mail

    An automated mail will be delivered from ALEXCIOUS after an order has been placed.

  3. 3
    Approximate Shipping Date Mail

    For products that may take up to more than the period of notation to dispatch, another mail will be sent to notify the approximate shipping date in 1-3 business days

  4. 4
    Shipment Confirmation Mail

    A confirmation mail will be sent with the voucher number that indicates that the product has been shipped.

  5. 5
    Arrival of the Product

    After the order has been delivered, we request that you kindly rate our product on the review page.

Delivery and Wrapping

Shipping Method Delivery within Japan: Sagawa Express, Delivery Overseas: Express Mail Service (EMS) via the Japan Post Service
Shipping Fee
¥ 1,650
Estimated Delivery Date
Domestic delivery usually takes 1-3 days after the order is shipped.
For international delivery, delivery time can be estimated based on that of EMS (International Express Mail Service) once the order is shipped.Check the delivery time here.
Ship from Shinagawa-ku, Tokyo
Sagawa Express Tracking Info Site
EMS Tracking Info Site
Insurance Included
Wrapping Message card (+ 110JPY / texts can be personalized) and gift wrapping (+ 550JPY) options are available. (Gift wrapping materials may be different from the image due to the size or shape of the product.)

Payment Method

Customers inside Japan
Square (no handling fees)
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ATM (no handling fees)
Convenience stores (no handling fees)
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Online banking (no handling fees)
Cash-on-delivery (COD)

(For domestic shipping and wristwatch purchases only)
For those who would like to pay via cash-on-delivery (COD), please select the ATM option. Then, please specify the COD option and the desired date of delivery (excluding weekends, the date can be no sooner than 4 days after the order) on the information form below. Cash-on-delivery Option/ Service Fees

Less than JPY 10,000
JPY 300
JPY 10,000 or above ~ less than JPY 30,000
JPY 400
JPY 30,000 or above ~ less than JPY 100,000
JPY 600
JPY 100,000 or above ~ less than JPY 300,000
JPY 1000
Customers outside Japan
Square (no handling fees)
  • VISA
  • Master Card
  • American Express
PayPal (no handling fees)
  • VISA
  • Master Card
  • JCB
  • American Express
Kindly notes If you view our site in Japanese, you may choose any one of the payment methods above. If you view our site in other languages including English, you may only make your payment with Square or PayPal.