1990 Found the efficacy of hair growth (150% increase in hair growth than hair grower on the market by comparison) and compounds—D-limonene, inhibiting 5-α reductase.

Miyauchi was awarded with patent by Japan, Taiwan, and Hong Kong.
Content of limonene itself was not sufficient enough to increase as the human results indicated.Further studies requested.
 Interviewed by “Zoom in Asa” – morning TV show