The British version of Dragons' Den is based on the Japanese television format Money Tigers.
Money Tigers was created in Japan and established the central idea of entrepreneurs presenting business proposals to wealthy investors. The British programme adapted that structure while replacing the original title and investor terminology with the “dragons” concept.
The format spread internationally, producing versions in countries including Canada, Australia, Ireland and the United States. The American adaptation is known as Shark Tank, which is why viewers may incorrectly identify that title as the source of the British series.
Although local versions differ in casting, rules and business culture, the essential dramatic mechanism is shared: entrepreneurs request funding, investors question the proposal, and an offer may be made in return for equity.