first, do a japanese websearch for that bass. then, calculate the yen into SGD. next, apply postal charges which would usually be 100SGD + 5% of the bass. then apply GST, and $5 handling fee on the local side. finally, ask the website if they do international EMS shipping, and payment by wire transfer. then add teh wire transfer fee.
i'm not well versed with the price of ESP basses such as that, but i'd say ... 2k-3k range