I-ishi-usu iyitshe lokugaya ngesandla laseJapane elenziwa ngamapuleti amabili egranite anobuso bokugaya obuqoshiwe. Itshe eliphezulu lijikeleza ku-eksisi esemaphakathi, kanti impahla ethelwa embotsheni ephezulu igayiwa phakathi kwalobo buso obubili. Ekukhiqizweni kwe-matcha, ukujikeleza okuhamba kancane (umjikelezo owodwa ngomzuzwana) kuvimbela ukuqongelelana kokushisa okulimaza i-chlorophyll nama-asidi e-amino. I-ishi-usu enhle ikhiqiza i-matcha enosayizi wezinhlayiya ongu-5 kuya ku-20 wamamayikhromitha.