Vic here. Mihashi has slow ”fastball”, fast “fastball”, curveball, slider, shootball (shuuto), knuckle curve.
Shootball / Shuuto
Slider
Curveball
Knuckle curve
A standard curveball, thrown with one or more of the index or mean fingers bent.
Gives a better grip on the ball and allows for tighter spin and greater movement. In all other respects, this knuckle curve is identical to the standard curveball.