Who owns Netsusama Sheet?
Netsusama Sheet is owned by Kobayashi Pharmaceutical (Japan, TSE: 4967).[1]
This ownership is reported in official statements but has not yet been matched to a regulatory filing.
Evidence: Kobayashi Pharmaceutical Integrated Report 2026, Kobayashi Pharmaceutical Co., Ltd. Last checked .
Key facts
- Current owner
- Kobayashi Pharmaceutical Co., Ltd. reported
- Owner HQ
- 🇯🇵 Japan, Osaka
- Origin
- 🇯🇵 Japan
- Founded
- 1994
- Category
- Consumer health › Over-the-counter medicine › Cold
- Parent ticker
- TSE: 4967
- Last verified
- · 1 sources
About Netsusama Sheet
Netsusama Sheet is a cooling gel sheet for the forehead that Kobayashi Pharmaceutical launched in 1994, inspired by the chill of konjac. Its cooling time was extended to eight hours in 2001. Overseas sales began in Hong Kong in 1996 and it is sold as KOOLFEVER in Southeast Asia and BeKOOOL in the United States, where Kobayashi started its marketing with the product; overseas now accounts for about half its sales.
Ownership timeline of Netsusama Sheet
- Current owner Kobayashi Pharmaceutical [1] reported
Where Netsusama Sheet sits in Kobayashi Pharmaceutical
Controlling ownership as of . Brands grouped under the entity that owns them; large groups are collapsed.
Open the full Kobayashi Pharmaceutical ownership tree →
See the full Kobayashi Pharmaceutical brand portfolio (6) →
Other brands owned by Kobayashi Pharmaceutical
Kobayashi Pharmaceutical controls 6 brands on Brandtree, 2 of them in consumer health.
Also in consumer health
- Ammeltz (1966)
Other brands in cold, and who owns them
The 36 brands in cold on Brandtree belong to 21 owners. The largest is Krka, with 5.
| Brand | Owner | Owner based in |
|---|---|---|
| Herbion | Krka | 🇸🇮 Slovenia |
| Breathe Right | Prestige Consumer Healthcare | 🇺🇸 United States |
| Lemsip | Reckitt | 🇬🇧 United Kingdom |
| Covonia | STADA | 🇩🇪 Germany |
| Dimestil | Birzeit Pharmaceutical | 🇵🇸 Palestine |
| HealthCareAisle | Dr. Reddy's | 🇮🇳 India |
| Tukol | Genomma Lab | 🇲🇽 Mexico |
| Benadryl | Kenvue | 🇺🇸 United States |
About the owner: Kobayashi Pharmaceutical
Kobayashi Pharmaceutical is a publicly listed company headquartered in Osaka, Japan, founded in 1886. Brandtree records 6 brands under its control, and it is listed as TSE: 4967.
Kobayashi Pharmaceutical traces its origin to 1886, when Chubei Kobayashi opened a general merchandise and cosmetics store in Nagoya, and was incorporated in Osaka in 1919. After selling its wholesale business in 2008 it became a pure manufacturer of niche household products and over-the-counter medicines, with about 150 domestic brands and net sales of 165.7 billion yen in 2025, about 28 per cent of them overseas. It voluntarily recalled red yeast rice products in 2024.
Kobayashi Pharmaceutical: full profile, brands and acquisition history →
🇯🇵 Netsusama Sheet and other Japanese brands
Brandtree records a controlling owner for 456 brands that began in Japan. 23 of them (5%) are now controlled by a company headquartered in another country; Netsusama Sheet is not one of them.
- Air Salonpas — Hisamitsu Pharmaceutical 🇯🇵
- Biofermin — Taisho Pharmaceutical 🇯🇵
- Daiichi Sankyo Stomach Medicine — Daiichi Sankyo Healthcare 🇯🇵
- Jelly Monster — Okamoto Industries 🇯🇵
- Sagami Original — Sagami Rubber 🇯🇵
- "K" Line — K Line 🇯🇵
Frequently asked questions
Who is the parent company of Netsusama Sheet?
The parent company of Netsusama Sheet is Kobayashi Pharmaceutical, a publicly listed company headquartered in Japan.
Is Netsusama Sheet Japanese?
Yes. Netsusama Sheet originated in Japan in 1994 and its owner, Kobayashi Pharmaceutical, is also headquartered in Japan.
Is Netsusama Sheet still owned by Kobayashi Pharmaceutical?
Yes. As of 16 September 2026, Netsusama Sheet is still owned by Kobayashi Pharmaceutical. The ownership record was last checked against primary sources on that date.
Sources (1) & corrections
Last verified . Every ownership fact above is backed by one of these primary documents. Numbers in brackets in the text refer to this list.
- [1] Kobayashi Pharmaceutical Integrated Report 2026 — Kobayashi Pharmaceutical Co., Ltd., Annual report; retrieved 16 September 2026.
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