Wagotabi
Wagotabi is an rpg that lets you explore Japan as you learn. It is set to be released this year and there are plans to expand the content to cover all the prefectures. Having played the demo, I can say that it’s more geared towards beginners. The beginning might be a bit fast paced, but I think that’s really forgivable given the intention of the game. A major component of the game is to showcase prefectures (right now, just Kagawa), but I think it’s absolutely fantastic to see a game about exploring Japan, especially a lesser-known area. The game focuses on all aspects of language learning other than speaking and includes cute minigames to help you drill. Even though not a lot of content is currently available, I would already recommend it.
If you’re familiar with @drdru 's stories, I would say this game is like if a team of less funny drdrus were able to work together to make an interactive game.