Japanese-type squash. 90~100 days. Round fruits in black or dark green color, with deep orange interior, 5~6 lb. Firm flesh, nutty, and sweet. Mainly used as rootstock for watermelon, melon, and cucumber. Pollinators are required to grow squash. 5 plants of Tetsukabuto need 1 plant of pollinator. Pollinators can be butternut, kabocha, etc.  Avg. 2,100 seeds/lb, 130 seeds/oz. Packet: 10 seeds.