J-Lex
English-based database providing reliable information on pharmaceuticals available in Japan. Discover therapeutic categories, ingredients, and manufacturers with up-to-date English terminology.
About This Site
J-Lex is designed to assist researchers, medical professionals, and global companies
who need access to English-based information on Japanese pharmaceuticals.
Japan’s medical market is one of the most regulated and complex in the world.
English-language information is often fragmented or outdated.
This platform provides a unified, searchable database of approved, marketed pharmaceuticals in Japan,
translated and categorized for easy understanding.
- 🔹 Search by therapeutic category, active ingredient, or brand name.
- 🔹 View detailed information including YJ code, manufacturer, and dosage standards.
- 🔹 Access English translations of domestic product information for cross-border collaboration.
Explore Categories
Therapeutic Categories
Popular Ingredients
Peritoneal dialysis fluid159Donepezil hydrochloride134Saline73Glucose72Levofloxacin hydrate71Aripiprazole63Amlodipine besylate63Pioglitazone hydrochloride63Pregabalin62Chlorhexidine gluconate60Memantine hydrochloride57Paroxetine hydrochloride hydrate54Montelukast Sodium53Pitavastatin calcium51Valsartan50Epinastine Hydrochloride49Rivastigmine49Ethanol49Rosuvastatin calcium48Rabeprazole Sodium48Purified sodium hyaluronate48Risperidone47Quetiapine fumarate47Azilsartan46