Kaga City website about Dundas Tomono kai
The Duolingo app is a good place to start learning Japanese basics.
There are many language lessons on You Tube. This is a nice one to begin with.
The Japan Rail Pass (aka JR Pass) is a nationwide rail pass for long-distance train travel in Japan.
Social media sites such as Reddit r/JapanTravelTips, TikTok #learnjapanese #japaneselesson are okay secondary resources for lessons on language, culture and preparing for the trip.