KOBAYASHI Laundry Detergent for Underwear

Product Description:

Period stains on underwear can be frustrating, especially when a normal wash does not fully lift them. KOBAYASHI Laundry Detergent for Underwear is a Japanese liquid detergent designed to help remove menstrual blood and discharge stains through soaking rather than scrubbing. You dilute a small amount in water and soak your underwear for about 20 minutes to help lift stains without excessive rubbing.

What makes this one worth keeping in the laundry room is how it works. It uses a strong cleaning agent called SAS that loosens protein-based stains like blood, so a short soak does the heavy lifting for you. The liquid has a light, fresh soap scent and a slightly thick texture that clings to the stain, and more than 95% of the formula is designed to break down naturally. 

This soap works on most everyday underwear fabrics, including cotton, linen, polyester and other synthetics, and it is a smart pick for delicates you would rather not scrub. You can either soak items or apply KOBAYASHI Laundry Detergent for Underwear directly to a stain before a machine wash. If a stain is older or already set in, apply the soap directly and give it a longer soak before rinsing. If you need to clean silk pieces, or you are looking for an everyday detergent for a full laundry load, this is not the right product for those jobs.

Features:

• Lifts tough stains like menstrual blood and discharge with just a 20-minute soak.

• Cleans by soaking, so there is no hard scrubbing that can wear out delicate fabrics.

• Light, fresh soap scent with no strong chemical smell.

• Works on cotton, linen, polyester and other everyday synthetics.

• The formula has a reported biodegradability rate of over 95%.

• An easy-to-use Kobayashi lingerie detergent with a one-touch cap and a measuring guide on the bottle.

What It Tackles:

• Menstrual blood stains

• Discharge marks

• Older or set-in stains on underwear

Works On:

• Cotton, linen, polyester and most synthetic fabrics. Not suitable for silk.

Made In:

• Japan

• Less effort: a short soak does the work, with no scrubbing needed.

• Fabric-friendly: soaking helps reduce the need for scrubbing delicate underwear.

• Targeted cleaning: made specifically for blood and discharge stains, not just general dirt.

• Pleasant to use: light soap scent and an easy one-touch cap.

• Mindful formula: more than 95% is designed to break down naturally.

1. Fill a basin with about 500 ml of cool or lukewarm water, since hot water can set blood stains.

2. Add roughly 10 ml of the detergent, which is one mark on the side of the bottle, and stir to dilute.

3. Soak the underwear in the KOBAYASHI Laundry Detergent for Underwear solution for about 20 minutes.

4. Apply the soap directly onto older or stubborn stains and leave it longer for a better result.

5. Rinse thoroughly with water, or finish with a normal machine wash.

6. Use cool water throughout, and wear gloves if your skin is sensitive or you are soaking for a long time.

Key Ingredients:

• SAS (Sodium Alkyl Sulfonate): A strong cleaning agent that loosens protein-based stains like blood so they rinse away with a soak.

• Polyoxyethylene Alkyl Ether: A cleaning agent that helps lift dirt and stains from fabric fibres.

• Sodium Alkyl Sulfate: A surfactant that adds to the soap's cleaning power on tough marks.

• Stabilizer: Helps keep the formula consistent and effective over time.

Ingredient Claims:

• Biodegradable Formula (over 95% breaks down naturally)

Full Ingredients List:

Surfactant (40% sodium alkyl sulfonate (SAS), polyoxyethylene alkyl ether, sodium alkyl sulfate), stabilizer

Kobayashi Pharmaceutical is a Japanese company known for developing practical healthcare, personal care, and household products designed to solve everyday problems. Founded in Japan in 1886, the brand focuses on creating simple, effective solutions across categories including hygiene, skincare, oral care, and home care.

Kobayashi is widely recognized in Japan for its targeted products, including specialized cleaners and personal care items that address specific needs rather than being general-purpose products. The Kobayashi Underwear Laundry Detergent reflects this approach, with a formula specifically developed for delicate underwear care and stain removal.

You can shop Kobayashi products at C&C Canada, your destination for authentic Japanese beauty, personal care, and lifestyle products.

1 × KOBAYASHI Laundry Detergent for Underwear, 120 ml