[Added on May 15] "Family Computer & Super Nintendo Entertainment System & Game Boy Nintendo Switch Online" additional titles are now available. Topics | Nintendo
By subscribing to "Nintendo Switch Online", you can play "Family Computer Nintendo Switch Online", "Super Nintendo Entertainment System Nintendo Switch Online", and "Game Boy Nintendo Switch Online"....
The linked article is in Japanese.
Download doujinshi, games, and ASMR on "DLsite Doujin"
"DLsite Doujin" is a download shop for doujinshi, doujin games, doujin voice works, and ASMR content. You can immediately download and enjoy products you like! New items appear every day so you're sure to find something for you. Welcome to Japan's largest 2D content online retail site - DLsite!PR