Kobayashi Seiyaku Whitening Sumigaki— Whitening toothpaste with charcoal, 90 g

Kobayashi Seiyaku Whitening Sumigaki — Charcoal Whitening Toothpaste, 90 g

Whitening Sumigaki (ホワイトニング炭磨き) is a bestselling whitening toothpaste from Kobayashi Pharmaceutical (小林製薬), one of Japan's most respected pharmaceutical and oral care companies. The distinctive black paste formula combines activated charcoal with proven whitening actives to remove surface stains and prevent new discolouration — without bleaching or harsh abrasives.

Activated charcoal has long been used in Japan's traditional oral care (charcoal tooth powder, "sumigaki") for its high adsorption capacity: it binds to tannins, coffee pigments, and other staining compounds on tooth enamel and lifts them away during brushing. The formula also contains sodium hexametaphosphate as a polishing agent and fluoride (1000 ppm) for cavity prevention.

This is a 医薬部外品 (quasi-drug) certified product — meaning its whitening and cavity-prevention actives are reviewed and approved by Japanese pharmaceutical authorities.

See also: Japanese Oral Care | Japanese Health Products

Key Benefits

• ✓ Activated charcoal — adsorbs coffee, tea, wine, and tobacco stains from enamel surface
• ✓ Sodium hexametaphosphate — polishing agent that prevents new stain adhesion
• ✓ Fluoride 1000 ppm — cavity prevention and enamel strengthening
• ✓ 医薬部外品 (quasi-drug) status — whitening and cavity actives officially certified
• ✓ Kobayashi Pharmaceutical — one of Japan's most trusted oral care brands
• ✓ Authentic Japanese product — ships directly from Kobe, Japan

How to Use

1. Apply a 1–2 cm strip of toothpaste to a wet toothbrush (soft or medium bristles recommended).
2. Brush teeth for 2 minutes, covering all surfaces — outer, inner, and chewing surfaces.
3. Rinse thoroughly with water.
4. Use twice daily — morning and evening — for best whitening results.

Note: The paste is black — this is normal and expected from the activated charcoal. It rinses cleanly from teeth and oral surfaces.

Tip: For enhanced whitening, brush for 3 minutes and allow the paste to remain on teeth for 30 seconds before rinsing.

Active Ingredients

Sodium Fluoride (Fluoride 1000 ppm NaF), Sodium Hexametaphosphate.

Full Ingredients

Sorbitol, Water, Hydrated Silica, PEG-400, Activated Charcoal, Sodium Hexametaphosphate, Sodium Lauryl Sulfate, Sodium Monofluorophosphate (Fluoride 1000 ppm), Cellulose Gum, Sodium Saccharin, Flavour (Spearmint).

Cautions

• For oral use only — do not swallow.
• Keep out of reach of children under 6 years. If used by children aged 6+, use only a pea-sized amount and supervise to ensure spitting.
• If accidental ingestion occurs in large amounts, consult a poison control centre.
• Do not use if you have open sores, lesions, or sensitivity in the mouth without consulting a dentist.
• The black colour may temporarily stain sink basins — rinse the basin after use.
• Store in a cool, dry place. Keep cap tightly closed.

Package Contents

• 1 × Kobayashi Whitening Sumigaki Toothpaste — 90 g

Shipping & Store Notes

• Ships directly from Japan (Kobe)
• Processing time: 2–6 business days
• Tracking number provided after dispatch
• Import duties and taxes may apply depending on your destination country
• Opened cosmetics and supplements cannot be returned for hygiene and safety reasons

Authenticity Guarantee

Every product at Tsujimoto Market is sourced directly from Japan and verified for authenticity. We never sell fakes or grey-market goods. Each order is carefully packed and dispatched with full tracking.

FAQ

Does activated charcoal actually whiten teeth?

Activated charcoal is an effective surface stain remover — its highly porous structure adsorbs (binds to) colour compounds from coffee, tea, red wine, and tobacco on enamel. It removes existing stains but does not bleach intrinsic tooth colour the way hydrogen peroxide does. For best results, use consistently alongside regular dental check-ups.

Is charcoal toothpaste safe for enamel?

Kobayashi Whitening Sumigaki uses hydrated silica as its mild abrasive, not raw activated charcoal powder. The formula's RDA (Relative Dentin Abrasivity) is within safe ranges. It is not recommended for daily use beyond twice per day, and should not be used with extra-hard brushing pressure.

Does the black paste stain teeth or the sink?

The black paste rinses cleanly from teeth — charcoal particles do not adhere to enamel. It may temporarily tint the sink basin dark; just rinse the sink after brushing. Some users note brief black residue in the interdental spaces — this rinses away with water.

Is this the genuine Japanese product?

Yes — Tsujimoto Market sources Kobayashi Pharmaceutical products directly from Japan and ships from our warehouse in Kobe.

How long does delivery take?

Orders dispatch within 2–6 business days. Delivery is typically 7–20 days depending on your country. A tracking number is provided.