Do this, and set the game to fullscreen.
Then, get the program "dxwnd" this allows you to run fullscreen games in a virtual window.
Now, just add Kamidori to dxwnd, click "No Banner", click "desktop center" under Position, and set your preferred window size at "Window initial position&size".
I would recommend 1600x900.
Lastly, go to the Video Tab, set "Window style" to "thick frame", set "Window size & position" to "free", Then, under "screen resolution" click "initial resolution" and set it to the same resolution you chose for the initial resolution.