re: Official Nintendo Switch Thread: Switch IN STOCK Tomorrow 5/21 - Best Buy

Also, it's super easy to access the jpn eshop. Has a LOT more games at launch and most are in english.

I've just gotten most of the neo geo games and the dragon quest heroes demo by doing so. Most games are in english too. So here are the steps:

Go to [mynintendo.com] and create a new account, set that user's country as Japan.
On your Switch, add a new user, and link that user to your newly created Japanese mynintendo account.
You now have access to browse and download demos from the JP eShop.
In order to purchase a game, you either need a credit card that is capable of international purchases (maybe? seems like some folks on twitter might have used their credit card) OR a Japanese eShop card. I have not tried to use a US eShop card for this, but I did accidentally try to use a JP one in the US eShop and it was rejected, so I assume the cards are directly linked to their currency.
You can buy japanese eShop cards from Play-Asia.com. You'll need to verify your account email with them before they can send you one, then they send you to a page with an image of the eShop code.
Once you have your JP eShop card, open the eShop with your Japanese account.
'Redeem Code' is the third button down on the menu on the left. Punch in your code, and this should add credit to your account in this eShop.
Buying a game is now just a matter of figuring out the menus in Japanese now! (Assuming you don't speak Japanese. More power to you if you do.)