I feel very confident in saying that you can use the words "RPG Maker" or "RPG Maker MV" in your book's title. There are thousands of similar examples out there of product names being used in widely-distributed, professional guides, such as "eBay for Dummies" and "The Unofficial Guide to Walt Disney World". eBay and Disney did not grant special permission to use their names, but these titles were allowed to stand. Referring to something in a factual manner is not the same as using its Trademark.
You do, however, need to make it very clear that your guide is not an official product, has no official association with RPG Maker, and is not endorsed in any way by Degica or Kadokawa.
I believe that you can also use screenshots taken from the program, such as a screenshot of an Event Page, as long as those screenshots don't contain official artwork (like Characters). Fair Use as education/instruction should defend that, even in a commercial medium. I'm not sure about stuff like RTP tilesets (you might need to make your own for use in screenshots in the guide).
With all that said, I agree with many of the posters above who offer the advice that to write a worthy guidebook for a very versatile program like this, you need to have a lot of skills both in the subject matter (RPG Maker) and in technical writing. If you don't have at least a couple of years of experience as a nonfiction author or a career in technical writing, this may be an undertaking to leave for someone else.