Year 1991 was the first with monthly issues and for that reason the hardest. Let's first try to determine its prominent features for VNs:
- Number of adult games increased greately to some 100 titles overall
- PC-98 era arrives with mouse support and the older systems finally lose support
- RPG percentage remains high at some 20% while ADV grows significantly to some 50%
- New sub-genres appear - point-and-click, quiz, board game.
- Some games start to use action icons instead of command selection thanks to mouse use.
- It's the last year without any government regulation. After November 1991 shoplifting incident regulations being created.