I think you're asking if the *DUO* cables are the same between US & JP systems, and the answer is yes. I've used the same cable for both my Turbo & PCE *DUO*systems.
As for the TurboGrafx-16 System, there aren't any proprietary a/v cables for the TurboGrafx-16 System -- they're just standard RCA A/V cables, but of course, you need the TurboBooster/Plus or the TG-16 CD-ROM unit to use those RCA cables since the vanilla TG16 unit only has an RF output.