$WC94 Antique Japanese tea bowl by Great potter, Otagaki Rengetsu, Carved poem

Her poet is carved on the body. The wooden storage box (no signature) is also included. 
 

Otagaki Rengetsu (1791–1875) was a Buddhist nun who is widely regarded to have been one of the greatest Japanese poets of the 19th century. She was also a skilled potter and painter and expert calligrapher.

Originally born into a samurai family with the surname Todo, she was adopted at a young age by the Otagaki family. She was a lady in waiting at Kameoka castle from age 7 to 16, when she was married. However, her husband died in 1823. Otagaki joined the temple Chion-in and became a nun, taking Rengetsu ("Lotus Moon") as her Buddhist name. She remained at the Chion-in for nearly ten years, and lived in a number of other temples for the following three decades, until 1865, when she settled at the Jinko-in where she lived out the rest of her life.

Though best known as a waka poet, Rengetsu was also accomplished at dance, sewing, some of the martial arts, and Japanese tea ceremony. She admired and studied under a number of great poets including Ozawa Roan and Ueda Akinari, and later in her life became a close friend and mentor to the artist Tomioka Tessai. A number of Tessai's works, though painted by him, feature calligraphy by Rengetsu.