I have imported a substantial amount of purchases from Japan using a Shopping Portal.
I have had a couple of experiences that were not ideal, but was handsomely reimbursed through insurance and also kept the goods with the transit damage, not such a bad place to be, as the insurance more than covered the small cost to return the items to their finest fettle.
The shopping Portals are great, I usually add 20% for their services for receiving goods and packing to make ready for next stage shipping.
There is usually a calculator to be used prior to bidding/buying to enter Package Size and Weight and get a next stage shipping quote.
Typically add 25% Import at your own Countries end and there is the Ball Park figures.
Shopping Portals Customer Service is a great help, you can request a oversized Box, which is doubled up to be very impact resistant, the oversized space can be requested to be filled with Large Air Pocket Bubble Wrap.
Speak to services in your own Country to see if assistance is at hand if a unwanted incident occurs, maybe a fragile part has detached from a circuit and is effecting Power On ?
You will need a 100V Power Supply for Electrical Goods