Bethesda Softworks have updated both DOOM (1993) and DOOM II (Classic) adding 60 FPS support, Quick Save functionality and curated Add-ons. Check out the full patch notes here. Both games are available now on the Switch eShop, each priced at ¥580.
Bethesda Softworks have published both DOOM (1993) and DOOM II (Classic) on the Japanese Nintendo Switch eShop priced at ¥580 each. At time of posting DOOM 3 is not available in Japan (although is in the west). Both games support English, Spanish, French, German, and Italian (not Japanese), and are 368 MB and 369 MB respectively.