Amuzio, the publisher of Stardew Valley for Nintendo Switch in Japan, has announced the version 1.3.33 update is now available for the Japanese version of the game.
While that might sound odd, Japan only. It does not mean what you might first think. This update was actually released in the west months ago. So we have been enjoying it for quite some time.
The main feature of the update now released in Japan is that upon installing the update, players can access co-op play from the main menu.