Filaments blended with black silica, only produced
in a limited area in Japan,
result in an increased plaque removal rate!


ABOUT Mizuha

SHINYEI KAISHA, utilizing long-standing experience in developing bristles for toothbrush, develops oral care products that apply Japanese superior manufacturing technology, exports and sells them to countries around the world through SHINYEI group’s global network.

Via the utilization of Japan’s excellent capabilities at manufacturing sites, and to meet potential global needs in the field of oral care, we wish to make products available that bring joy to people all over the world, irrespective of their race and gender. We wish to be a good partner to customers and thereby establish healthy practices in ordinary everyday life together with them. The brand name, “Mizuha,” presents these wishes.

Products sold under
the Mizuha brand shall

  • fall under the oral care product category
  • be made in Japan
  • be safe
  • be developed using excellent and innovative Japanese manufacturing technologies
  • have the appropriate functions and designs that will allow people throughout the world to use them comfortably

“Mizuha” is the alphabetical notation of a classic Japanese word that is used to praise good teeth. It is used to describe “shiny” or “good” teeth. “Mizu” denotes a young, bright and fresh state and is a word that is used to praise someone who has a fresh and pure appearance.


wakka ブラックシリカ


We use tapered bristles with natural black silica powder!
Test report from Japanese dental university proves that
Wakka has high cleaning effects without the use of toothpaste.