Reply To: Reliable Japan Rail Timetables
For checking next train etc, Jorudan is likely the best.
You are correct though, leave extra time for transfers! And it can depend on the company. Subway lines can be very quick and you can almost go the same speed as everyone else. JR on the other hand often makes you wait, and even if you get to the platform and there is a train waiting, you may need to wait for them to contact your destination to ensure someone can meet you, and therefore wait for the next train.
So, remember for your planning that you will need to add wait times for the person to come get you to guide you, as well as at transfers. The accessible routes are are sometimes (often?) not as direct as the normal routes and going up and down elevators etc can eat up time.
You mention you are in a manual wheelchair, so you might not need the assistance of staff, but you may want to use it just because you don’t need to worry about finding your way – they guide you… at the cost of time.
Bonus:
While it isn’t time-table related, this website can help you find the accessibility of most stations: https://www.ecomo-rakuraku.jp/en
