I'm sure that upgrade will be included on the upcoming lines of simulacra-of-the-dead, and you won't even need to scratch, it'll be included as standard to exhude from the very same sweat-gland areas present in the living.

And they'll do adjustments for you, "actually they were smellier than that" - no problem, just set it to underscratch the 'skin' more often.

Damn you Truman, look at what you've done.

At the risk of sanctimoniousness, I dare say that Ishinokoe boffins are glossing over this interactive undertaking and thereby selling the survivors short with a deprivative sensory near-dead experience. For a few yen more, the technology is widely available to handily make the gravestone barcodes to be "scratch-N-sniff" imbued with the essence of the dearly departed in all of their funerairy glory. That would be a pecksniffian whiff of genious; just scratch the bar code, and "ah_ there's grandfather!" An olfactory effluvium down memory lain.