Jokoro（じょうころ）means incense burner, in Temples or Shrines it is used to place incense on altars, there is also a large incense burner between the main hall and the Portal.
Jokoro is used for body cleansing in Temples and Shrines.
Since then, people have come to believe that incense burner smoke has a healing effect
That’s why visitors or worshipers gather around the incense burner. People crowd around the Jokoro (incense burner) waving their hands for the smoke to cover their heads. Based on the fact that smoke is a cure or helps you get intelligentr.
Incense burners were brought to Japan from China at the end of the Sengoku era (feudal period), about 400 years ago.