AI itinerary validation for Japan travel

Hi everyone, I’m looking for guidance on how to plan a Japan itinerary efficiently and accurately. On my previous trip, I planned everything with a guide, which worked well but was very expensive. This time, I’d like to avoid that cost and build my own itinerary. I already have a list of destinations, and some people have confirmed that the travel between them is theoretically possible, but I need to properly verify that the route is realistic in terms of timing, transfers, and daily pacing. I’m specifically looking for an AI tool or app that can \*\*validate an itinerary:\*\*including travel times and logistics-more reliably than Google Maps alone. I’ve come across a few itinerary planners and AI-based tools, but before relying on them, I’d really appreciate input based on **personal experience**. If you’ve used any apps, websites, or AI tools to plan a Japan trip and can comment on: * accuracy of travel times * realism of daily schedules * overall reliability I’d be very grateful for your recommendations, and for any insight into which tools are actually trustworthy and which to avoid. Thank you in advance.