Money Tigers was the original Japanese title of the television format adapted as Dragons' Den.
The Japanese programme was created by Nippon Television and placed entrepreneurs in front of wealthy investors. Contestants sought money for their ventures by offering equity, creating the negotiation-based structure later used by international versions.
The name Dragons' Den is not the original title of the concept. It is one of the international branding choices applied to local adaptations, while the United States used the title Shark Tank. This difference explains why the same broad format can have different investor nicknames in different countries.
The Japanese title is often written in English as Money Tigers. It should not be confused with a generic description of investors or with a Japanese edition produced after the international franchise became famous. The source format itself is the key historical link between the local series.