Money Tigers is the Japanese television format adapted into the British series Dragon's Den.
The original Japanese programme presented entrepreneurs seeking finance to a panel of wealthy businesspeople. The British adaptation retained the central structure: founders make a business pitch, investors question the proposal, and the parties negotiate possible investment and ownership.
Shark Tank is a related but separate American adaptation of the same broad international format, so it is a common mix-up rather than the source title for the British version. The British programme is also part of a wider Dragons' Den franchise that has been adapted in multiple countries, each with its own panel and production history.