I got the Navitime app for travellers and am hating it.

Had to go to JR’s own timetables to figure out a route between Hiroshima and Kanazawa. Plug in that journey with the request to arrive by 6pm (or any other time really) and it doesn’t show anything that takes less than 12 hours.
Google maps doesn’t seem to give me the actual train name number (such as Hikari 533) but is much more useful.

EDIT TO ADD - Never did get it to work. Excluding Nozomi or Mizuho trains (which my pass didn’t include) may have been a reason why I didn’t see reasonable through-times on this route.