Amazon Japan has started offering international shipping for Nintendo Switch with free 3000 yen.
Starting June 27, 2019, retailers all across Japan will offer a code to redeem 3000 yen (around USD29.99) worth of value on the Nintendo eShop. The code is redeemable on a Japanese region Nintendo Account. The offer is while stocks last.
Pre-order Nintendo Switch with free 3000 yen below (ships worldwide):