Raku XII Konyu (1857-1932)
楽十二代 弘入

Born as the eldest son of Keinyu, he succeeded as the 12th generation in 1871 at the age of 15. He took the name on Konyu at his retirement in 1919. He was confronted with difficulties together with his father when he succeeded to the house, since the tea cult was still in decline at the dawn of the modernization of the Meiji period.
The use of trimming to render variations of form, which has been a common practice since Ryonyu, is equally characteristic of Konyu's work.

References:
Signature and seal of Konyu, see: Encyclopedia of Signatures and Seals (落款花押大辞典 Rakkan Kao Daijiten), Kyoto 1982, p.1439.