It’s only shameful and remorseful if it comes to light. Otherwise in most cases things leading to the above would be avoided from the outset.

On the other hand, once found out, they typically own up, take responsibility and step down from the role.

...which is a step back from the usual Japanese practice of choosing a kaishakunin to render some assistance

Fake data seems to be common there in recent years, from car industry to steel and now this

You forget the whole iPS and STAP cells fiascos (yes, plural).

and crime

I remember when that RIKEN researcher with bold yet falsifiable stem cell claims ended up ending their own life

Haruko Obokata was the researcher in question and she did not end her own life.

It was her supervisor who committed suicide.

extremely sorry for the equivocation thank you for clearing that up

Nowadays Japanese medical papers are notorious about fake.