I have different view about maintaining my cars.
I am a DIY guy, and do routine maintenance @ 5000kms by changing oil + oil & air filter. Plugs @ 20k.
Bought my 1st JDM in 2006, Vitz 2003 F model from Karachi with only 23k on odo. Never took it to mechanic or dealership.
Car gave me troublefree service over the last 10 years. Sold it last months at 145,000 kms.
In my opinion JDM's are sensitive and should not be touched by Mistri Sb.