Vehicles have to be under 3 years.
Vehicles have to be Right Hand Drive.
TAX
Duty : OMV (Open Market Value) x 20%
Consumption tax : (OMV + Import duty) x 7%
Surcharge: 10,000 Singapore Dollar
Reference
Singapore Customs
http://www.customs.gov.sg/
Land Transport Authority
https://www.onemotoring.com.sg/content/onemotoring/home.html
Other
Singapore Embassy
http://www.mfa.gov.sg/tokyo/
Port
Singapore