Top 22 Medicines in Japan
This curated ranking covers the 22 largest medicines in Japan, ordered by estimated audience size from Rascasse's anonymized search-behavior signals. Amway, Bayer and Pfizer lead the list with a combined estimated audience of 825,902 people. Across all 22 entries the average audience size is 78,393, and the largest, Amway, reaches around 427,440 people in Japan. Audience size is the estimated number of unique people in Japan who actively engage with each medicine, derived from search demand signals. Rankings reflect search-behavior signals collected across Japan and are refreshed weekly.
Ranking
| Rank | Name | Audience size | Country share | Subtype | Category |
|---|---|---|---|---|---|
| 1 |  Amway |
427,440 | 3.5% | Medicine | Health |
| 2 |  Bayer |
262,678 | 3.0% | Medicine | Health |
| 3 |  Pfizer |
135,784 | 0.9% | Medicine | Health |
| 4 |  BASF |
135,206 | 2.8% | Medicine | Health |
| 5 |  Herbalife |
128,838 | 0.8% | Medicine | Health |
| 6 |  Novartis |
104,727 | 1.5% | Medicine | Health |
| 7 |  Novo Nordisk |
84,645 | 0.9% | Medicine | Health |
| 8 |  Merck & Co. |
83,197 | 1.8% | Medicine | Health |
| 9 |  Abbott Laboratories |
78,512 | 2.1% | Medicine | Health |
| 10 |  Dr. Scholl's |
66,313 | 2.2% | Medicine | Health |
| 11 |  Sanofi |
57,589 | 1.1% | Medicine | Health |
| 12 |  Boehringer Ingelheim |
54,416 | 1.6% | Medicine | Health |
| 13 |  Bristol-Myers Squibb |
50,144 | 2.5% | Medicine | Health |
| 14 |  Naloxone |
22,584 | 2.3% | Medicine | Health |
| 15 |  Shaklee |
13,508 | 1.6% | Medicine | Health |
| 16 |  Doppelherz |
7,977 | 0.6% | Medicine | Health |
| 17 |  Polydimethylsiloxane |
5,628 | 5.3% | Medicine | Health |
| 18 |  Varilux |
3,695 | 0.7% | Medicine | Health |
| 19 |  ThermaCare |
749 | 0.2% | Medicine | Health |
| 20 |  Bausch & Lomb |
383 | 0.1% | Medicine | Health |
| 21 |  Meridol |
359 | 0.1% | Medicine | Health |
| 22 |  GlaxoSmithKline |
285 | 0.0% | Medicine | Health |
Frequently asked questions
How is this Top 22 list compiled?
Rascasse aggregates anonymized search-behavior signals across Japan and ranks each medicine by its estimated audience size. Only entries with at least 5 measured entities are listed.
How often is the list updated?
The ranking is refreshed weekly from the latest search-behavior data and re-published as a static page.
What is the largest medicine in Japan?
Amway currently leads with an estimated audience of 427,440 people in Japan.
Methodology
Audience sizes are estimated from anonymized search-behavior signals across Japan. Lists below 5 entries are not published. See methodology for full details.