Okay, a quick breakdown of costs here:
1x NBR390GL - screen price on 16th Jan - ¥11,000, ex. tax ¥10,000
1x NBR290GL - screen price on 16th Jan - ¥9,029, ex. tax ¥8,208
2x Koken RSAL200-3/8X8 - ¥4,022 - ex. tax ¥3,656
sub total - screen price ¥24,051 - ex. tax - ¥21,864
shipping and handling DHL / Amazon Global priority - ¥2,177 - ex. tax sub total = ¥24,041
import fees and taxes ¥5,529 (~23% which is similar to local VAT/GST)
Grand total ¥29,570 all customs pre-cleared.
Took Amazon's forex billing in Euro as my CC charges 2.65% handling fee and Amazon works out cheaper. YMMV.
Checked the price of them today (22nd Jan) and it's now ¥11,440 (¥10,400) for the NBR390GL and ¥8,890 (¥8,082) for the NBR290GL - algorithms ****.
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In Euro with VAT@23% / without VAT:
NBR390GL - €96.23 / €78.23
NBR290GL - €78.98 / €64.22
Koken RSAL200-3/8x8 - €17.59 / €14.30
Shipping - €20.95 / €17.03
(Expensive, but for comparison a Snap-on F80 dual drive 3/8" ratchet would be around €130 new here)