depends on how many ppl take it personally when you ghost/ignore them even if it's not on purpose, or life getting in the way. tho given japan's 'black company' culture other than other coworkers i can imagine it being like "my job gives me literally no freetime/i have a kid now" and such
tho sometimes you get haters or at least ppl provoking/nagging you /because/ you're introverted
Nah. If people you know turn out scum, it's best for your health to reset. If you work in a company where nobody wants to stay long it's easy to make new aquaintences.