What chasen means
A chasen is hand-carved from a single node of bamboo, with tine counts that commonly range from 70 to 120. More tines generally produce a finer foam in usucha, while fewer, thicker tines suit koicha. Takayama in Nara is the most established source, and most chasen sold by Ippodo or Marukyu Koyamaen are made there.
Also called
Chasen also appears as bamboo whisk, tea whisk.