noun
A person who advocates or practices philanthropy; often used in formal or ideological contexts.
彼は有名な博愛主義者で、多くの慈善団体を支援している。
He is a well-known philanthropist who supports many charitable organizations.
慈善家 emphasizes charitable giving and social welfare, while 博愛主義者 stresses a broader ideology of universal love and humanitarianism.
Compound of 博愛 (universal love) + 主義 (principle, -ism) + 者 (person). The term reflects a Western-influenced concept of philanthropy.