Tosai - (TOH sye) - In its first year - up to one year old; is referring to koi age. When you buy tosai koi, you are purchasing it due to the lineage and future potential the koi has to grow big.
Dainichi Koi Farm has produced many famous show winners, including grand champions at the All Japan Nishikigoi Show, the biggest show in the world. Their koi excellence speaks for itself.
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