Welcome to Basschat, Matt!
Typical shipping costs to Europe from Japan to Europe with EMS should be in the €160 (gig bag) to €200 (hard case) range. Factor in (1) the purchase cost (should be free of local Japanese tax), (2) the shipping cost (see above, based on dimensions and weight), and (3) customs/import/VAT. (This normally runs to around 30% of (1) + (2).
if you are offered, or elect for, shipping via UPs, Fedex, DHL etc, then this can be upwards of €300 of declared value. Usually it’s faster than EMS.
Good luck…….I hope it goes well for you.