PGP Police Certificates

[shannon388]

Hello, I got invited to sponsor my parents this year. Haven't submitted yet. I'd wish to ask about police certificates required for my parents:

• they were born in China, and lived there until early 30s, and visited several times after (but none of these visits is 6+ months long)
• they lived in Italy since their 30s (they are now in their 60s, so 30+ years living in Italy)
• my father visited Japan for work, 1-2 months at a time, several times in the late 1990s - early 2000s (so no single uninterrupted visit of 6+ months, but cumulative visit is beyond 6 months)

I am pretty certain they need the Italian PCC. What other police certificates are needed?

Thanks