The Tenkai Group is a pharmaceutical company known for products such as the Coldkiller X medicine and the Megatoxin X pesticide. In 2000, it developed a cure to the taste disorders hypogeusia and ageusia. It is named after the Tenkai family, led by the parents of the pastry chef Issei Tenkai until their deaths. Tenkai still inherited the company as chair until his incarceration in 2000 for the murder of Paul Holic.