Tuning Japanese Diesel Cars (DPF)

Hi guys

[FONT=&amp]I have done European DPF offs but I have never done for Japanese. Is the procedure the same, in that I must reset dpf counters in order for DPF tune to take effect. Many diagnostic tools seem not to have reset dpf counter options for Japanese vehicles such as Mazda Bongo, or Nissan Caravan. Anyone with experience on this. Id appreciate to know how to go about