The Japanese eShop listings for Pokemon Sword and Shield have appeared online, and a Nintendo Switch Online feature will not be supported in the games. Both listings say it isn’t compatible with the save data cloud, which allows someone to back up their save data. (Thanks, Japanese Nintendo!)
A few other details are revealed in the product listing for the game. A Japanese copy has language support for Chinese, English, French, German, Italian, Japanese, Korean, and Spanish. It also confirms someone could use a Nintendo Switch Pro Controller with the game. Preloading will be available, and this listing says it will be a 9.5GB download.
Pokemon Sword and Shield will come to the Nintendo Switch on November 15, 2019.