I have a GW-400J watch from Japan and love it. It would be nice if I could take it off just by pushing 2 buttons like the MTG bracelet watches. There are push button deployment clasps that you can add to bands with just single hole notches in the center here:
Push Button Dual Deploy Clasps - a Stuhrling Instructional Video - YouTube
My GW-400J band has 2 notches side by side. Here is a picture:
It makes it more durable, I would guess, but it makes adding a push button deployment clasp difficult. Are there any manufacturers of these clasps that make them for bands with 2 notches?