PriceJapan are certainly excellent, even beating many UK companies on delivery times. I ordered 2 x Yamaha LPX500 projectors from them a couple of weeks back and both arrived fantastically well pacakged (as one parcel - see pic below)
There was also a cardboard outer around these two individual boxes - superb
Unfortunately one of the two had a couple of faulty pixels so having paid for the ship back option it was collected by DHL and arrived back in japan within 24 hours, though sat in customs for 4 days. A replacement was then sent out by PJ within 24 hours and is arriving today. cannot fault this company. They respond to e-mails very very quickly, are very helpful anf totally reliable. And this is in addition to some of the best prices available - anywhere in the world.
As to vat and duty. VAT is
ALWAYS charged (assuming DHL do not forget to invoice) so there is absolutely no way around that irrespective of the package classification. What you may get away with is duty (14%). Computer display devices are zero rated (for duty NOT vat) so if it is not marked (on paperwork or box - which will most likely be in Jpanaese

) as a home cinema projector then you mayindeed not have to pay duty (14%). But as stated, you will ALWAYS be charged vat unless DHL forget to invoice. And when they do it will be some time after the delivery so put someting to one side just in case.
HTH.