What's the Name of That Book??? discussion

I'm trying to remember the name of a science fiction novel I read, likely written in the 1990s or 2000s. The story starts with a male protagonist in a mental institution, but it's later revealed that he's actually trapped in a virtual reality world created by his company. The antagonist, one of his coworkers, has trapped him there as part of a scheme to take over the company and use the VR technology to simulate market behavior.

In the VR world, time moves faster than in the real world—what feels like years inside is only days or weeks outside. The virtual environment is incomplete, and the protagonist begins to realize something is wrong when he digs a hole and finds nothing underneath it, just a blank space where the system hasn’t filled in the details. The VR system connects people through a dream-like state, with participants lying in beds to access it.

There’s also a scene set in a virtual version of Japan. The protagonist was married at one point, which is mentioned as part of his backstory. The book is set in a near-future Earth, with no mystical or supernatural elements—just advanced technology.

Does this ring a bell for anyone? Any help would be appreciated!

I figured it out. It's called "Realtime Interrupt" by James P. Hogan. , published in 1995

Link Realtime Interrupt by James P. Hogan.