Two of Japan's largest pharmaceutical companies, Tanabe Seiyaku and Taisho Pharmaceutical, are merging in response to hard times in the Japanese pharma industry. Their union, which will take at least a year to complete, will create a combined company with $4.3 billion in sales, ranking it third in Japan in revenues. The move won't solve both companies' weak pipeline problems, but it will increase their total R&D budget and give them more sales clout in the domestic market. And as many Japanese pharma companies struggle for survival, analysts believe more merger activity is inevitable.

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