樂天 Explained

樂天, 楽天, 乐天 or 낙천, meaning "optimism", may refer to:

• Bai Juyi, courtesy name Letian (樂天), Chinese musician, poet, and politician during the Tang dynasty
• Jungjong of Joseon, courtesy name Nakcheon (낙천, 樂天), ruler of the Joseon dynasty of Korea
  • Optimism (樂天), 2001 album by Hong Kong singer Louis Koo Rakuten (楽天), Japanese technology conglomerate