Two or last years.. I kinda seen several old mmorpg making its come back as new mobile game. ( taking advantage of old timer nostalgia to play that game again) And as lately(this few, if not within half year) I seen more WN/LN being made/used for mobile game. It isn't like I never seen this before but back then, only alphapolis does this. Now, within a month or two, I feel like I seen new WN/LN being made into a mobile game. It isn't like I search through Japanese website, it just this lately I kinda seen new entry on QooApp new games. It kinda bug me P.S not counting manga because.. I dunno, I don't feel much shock(oh! They made this into game) From it
Japan makes lots of games based on novels or anime (especially anime), and if that doesn't work, some company will make the game into an anime