This is same goes here in the Phils. very difficult to get the tax refund. Since Mayekawa Phils. Corp is the withholding agent here on this transaction, it is our responsibility to deduct and remit to bureau the said tax otherwise Mayekawa Phils. will pay or shoulder the corresponding 30% tax.
I suggest you should discuss it internally on how you will consider this tax issue everytime you will contract with service to foreign country and make a careful study with your costing.