Tsuiso is the Japanese term for Twin Battle Drift.
This head to head style of drifting is judged by the same principles as a solo round. However, there is a high level of strategy behind it that provides for a competitive level and an awesome show for the spectators. The exact judging of this event is difficult to explain because the judges rely on their many years of track experience and knowledge of the vehicle dynamics when issuing the exact points.
Offensive – Generally the chasing driver has the offensive when in the Twin Battle. An easy analogy is Cowboys at a rodeo competing in the round up or two jet pilots engaged in a dogfight. They chase their prey and do whatever they can to get their target into a dead zone where the prey can no longer maneuver properly. This same principle is used in the Tsuiso style. Drivers use their vehicle and its drift to position into a space that minimizes the running drivers ability to keep a good line while staying in a high-speed
drift. The chasing driver MUST at all times demonstrate a superior drift in order to keep the pressure on the lead driver. The chasing driver must attempt to steal and block a line that may allow the lead driver a good opportunity for a drift, which result in higher points for the chaser. If the chasing driver is unable to keep up and maintain pressure on the lead driver, it will be reflected in the points he is awarded at the end of his run.
Defensive – When a driver takes the lead in the Tsuiso battle the ideal strategy is to perform drifts at much higher speeds, following the proper line at a greater angle than the chasing driver. If a lead driver can shake off or intimidate a chasing driver many times the chasing driver will make a mistake when trying to compensate for what seems like erratic actions of the lead car. When a lead driver can pull away with a good angle, following the ideal line while maintaining a controlled drift, the chasing driver has all the pressure to increase performance. The lead driver at this point is winning. Lead drivers many times demonstrate superior skill by suddenly entering a drift at a great angle and going directly to the inside of the corner. To the following driver it appears as though they will T-bone the lead car so they back down and take measures to avoid the lead car. Many times that will cause the chasing car to loose a great amount of speed and not be able to properly execute the corner in a full drift or even worse they may spin out or hit the barriers. This is a ideal outcome for the lead driver in Tsuiso battles.