Remove Wagyu steaks from the refrigerator. Salt generously on all sides and let sit at room temperature for 45 minutes.
Preheat a cast-iron skillet with oil over medium-high heat.
Place steaks in the skillet, cooking for 2-3 minutes until the bottom side becomes golden brown.
Flip each steak to the other side, cooking for another 2-3 minutes.
Check the internal temperature with a digital meat thermometer. If cooking to medium-rare, the thermometer should read 130 degrees. If done, remove the steak and set them on a cutting board. If your steaks need more time, reduce the heat to low and continue cooking another minute or two until the thermometer reads the desired temperature.
Rest steaks under tented foil for 5-10 minutes before enjoying.