Tea bowl made by Shimizu Hiroshi (born 1941) at the Rakuzan kiln (impressed seal on the the bowl) decorated by Shimizu Kosho. With original box (tomobako), signed and sealed by Shimizu Kosho. The collector's label: Fujisawa family collection.
 
The calligraphy on the bowl 圓空一味. "Same taste as Enku".
Enku (1632-1695) was a buddhist monk known for his countless wooden sculptures of buddha. Shimizu Kosho was known for his countless "clay buddhas" he made earlier in his career. Somehow Kosho imagined himself as standing in Enku's tradition. 
 
Shimizu Kosho (1911-1999) and 
Shimizu Hiroshi (b.1941) 
Glazed ceramic (Rakugama)
Height 8 cm (3 in.)
Diam. 12.5 cm (5 in.)
Original box (tomobako)