This site has info about the series:
http://dhrkenkyu.ashigaru.jp/series/vbseries.htmlI tried running these japanese games with Locale Emulator:
https://pooi.moe/Locale-Emulator/.Vampire Blaze v2's page is down but the download link is still alive:
https://yahoo.jp/box/V43RCRI could not run it on Win10 though. I heard some games work if you change the language for non-unicode programs in Windows's region settings but I was too lazy to try that.
I always get that same error mentioned above:
マップファイルが開けませんでした。
アプリケーションを終了します。
Vampire Blaze 3 runs KIND OF fine.
I played it a bit and there was a part with extreme slowdown for no specific reason.
EDIT: it seems to reset my video card everytime I toggle fullscreen (alt+enter), making the action run super slow after that.
The trick is to switch to fullscreen right after launching the game.