Hisamitsu Pharmaceutical
The Hisamitsu Pharmaceutical Co., Inc. (久光製薬株式会社, Hisamitsu Seiyaku kabushiki gaisha), headquartered in Saga and Tokyo, is a Japanese multinational pharmaceutical corporation that develops and markets prescription and over-the-counter drug (OTC) products, especially external pain relieving products such as the transdermal patch. Hisamitsu has specialised in transdermal drug delivery system technology (TDDS) since the introduction of its original line of patches in 1903.