Japan is currently sanctioning Samsung because it wants to avoid responsibility for WW2 sexual slavery.
There's a separate case which was decided in SK courts claiming in short that Japan should give SK more reparations, because of course a court is going to consistently find in favor of their own country versus a luke-warm neighbor over a historical tension.
This is flat out bullshit. Photoregist, hydrogen fluoride, fluorine polyimide are all together mainly used for photolithography/OLED. It is not a coincidence.
It is very obvious that Japan targeted Samsung and their primary goal is to ruin the Samsung and hynix's(SK semiconductor industry) business, ultimately to harm SK economy(semiconductor industry is significant to SK economy). They do this because of the recent SK courts' verdict and Japan don't like to admit nor apologize horrendous war crimes they committed in WW2.
Just repeating Japan's specious pretexts(that to avoid potential WTO issues and get plausible deniability) that they are doing this because of NK is disingenuous.
You pacified the German psyche so thoroughly that the Germans do it themselves now.
It's not up to you.
You are absolutely right; what Japan wants to do in their own country is their own decision.