noun
A person or entity that invests money. Slightly more formal than 投資家 (とうしか), which is more common in everyday contexts.
多くの投資者がこのプロジェクトに資金を提供した。
Many investors provided funding for this project.
Compound of 投資 (とうし, 'investment') and 者 (しゃ, 'person').