Japanese Ceremonial CharcoalCeremonial charcoal (Koh-tadon) is used for traditional incense ceremonies. Because Shoyeido's Ceremonial Charcoal is so clean-burning and emits no scent, it is regarded as the highest quality charcoal in Japan. Use with white ash in a ceramic or metal incense burner. Each box contains 25 cylinder-shaped charcoals. Each piece measures 3/4" tall and 3/4" wide.