Money Tigers provided the format for the British version of Dragon's Den.
The British programme is adapted from the Japanese television format Money Tigers, known in Japan as マネーの虎. The central idea is consistent across the format: entrepreneurs present business proposals to wealthy investors and seek funding in return for an ownership stake.
The BBC adaptation began in 2005 and uses the “Dragons” label for its investors. Other countries adapted the same basic concept under titles such as Shark Tank, but those are separate local productions rather than the original Japanese programme.
A common mix-up is to treat Dragon's Den and Shark Tank as unrelated concepts because of their different names. In fact, they belong to the same international format family. Money Tigers is the specific Japanese source format associated with the British edition.