Game site - https://genshin.x-legend.co.jp/
Enter here to register and chose Facebook/google/twitter.
To login in-game you must have IE (or IE TAB for other browsers) and Japanese proxy.
https://genshin.x-legend.co.jp press on game download and install game.
proxy: WTFast (working) http://www.wtfast.com/ it have a trial so you can check before buying (30 days first time)
To enter the game with WTFast - open wtfast with that settings
http://www.softether-download.com/en.aspx free VPN, not working on my computer so I can`t check it.
If both failed you always can try that VPN http://leafre.net/japanese-maplestory-80/how-get-free-high-speed-japanese-vpn-quickly~-17559/
Current updates - https://genshin.x-legend.co.jp/notice/index.php?news_type=3
After login for the first time you need to input your secondary password. Put 111111 111111.