Maria Nagai — Biography

Maria Nagai, who previously performed under the name Kashiwagi Kurumi, is a Japanese adult video actress. She serves as a supporting member of Black Diamond, a J-Pop musical ensemble that features three other well-known idols in its lineup: Anri Okita, Ai Sayama, and Mary Tachibana. Reiran Akame is her sister. By November 2025, Maria has built a substantial social media presence with 763,000 followers on Instagram, 846,000 followers on TikTok, and 28,300 subscribers on her YouTube channel.