The car is running great, i think to replace iridium plugs at 100k km, the inverter coolant is to be replaced at 150k miles accroding to the sticker on the car.
i regularly replace air filter with genuine toyota filter and clean battery filter myself.
my driving style is very calm, alhamdulillah brakes are doing great, will change brake pads at 100k km,
radiator coolant is still at the same level as it was when car was purchased.
i have kept other JDMs too, i personally believe there is no need to replace plugs and coolant till 100 to 120k km
but definitely every one has a different opinion and driving style and conditions, depending on that one might need to replace things at different intervals.