The British television programme Dragon's Den was based on the Japanese show Money Tigers.
Money Tigers was a Japanese reality television format in which entrepreneurs presented business proposals to wealthy investors. The concept was adapted for British audiences as Dragon's Den and then licensed internationally, producing related versions in several countries.
The investment-panel structure is the central feature shared by the formats: business founders make a pitch, answer questions and negotiate over a possible equity deal. The Japanese origin is sometimes overlooked because the British title became widely known around the world.
The programme is also part of the same broad international franchise that includes Shark Tank in the United States. Those titles are adaptations or local versions, not the original Japanese name.