My device is docomo (carrier) s9,
and ro.vendor.build.fingerprint is samsung/SC-02K/SC-02K:8.0.0/R16NW/SC02KOMU1ARF2:user/release-keys
I downloaded other Japanese device stock ROM and checked ro.vendor.build.fingerprint,
docomo s9+ is samsung/SC-03K/SC-03K:8.0.0/R16NW/SC03KOMU1ARF2:user/release-keys
KDDI s9 is KDDI/SCV38_jp_kdi/SCV38:8.0.0/R16NW/SCV38KDU1ARE4:user/release-keys
KDDI s9+ is KDDI/SCV39_jp_kdi/SCV39:8.0.0/R16NW/SCV39KDU1ARE4:user/release-keys
Other device, for example SM-G960U1 (US Unlocked) is samsung/starqltesq/starqltesq:8.0.0/R16NW/G960USQS2ARF4:user/release-keys
My device is docomo (carrier) s9, and ro.vendor.build.fingerprint is
samsung/SC-02K/SC-02K:8.0.0/R16NW/SC02KOMU1ARF2:user/release-keys
I downloaded other Japanese device stock ROM and checked ro.vendor.build.fingerprint, docomo s9+ is
samsung/SC-03K/SC-03K:8.0.0/R16NW/SC03KOMU1ARF2:user/release-keys
KDDI s9 isKDDI/SCV38_jp_kdi/SCV38:8.0.0/R16NW/SCV38KDU1ARE4:user/release-keys
KDDI s9+ isKDDI/SCV39_jp_kdi/SCV39:8.0.0/R16NW/SCV39KDU1ARE4:user/release-keys
Other device, for example SM-G960U1 (US Unlocked) is
samsung/starqltesq/starqltesq:8.0.0/R16NW/G960USQS2ARF4:user/release-keys