Japan Airlines also has its own exhibit dedicated to the flight 123 disaster ( https://en.wikipedia.org/wiki/Japan_Airlines_Flight_123 ). While also primarily meant for employees, it appears this one accepts public visits if reserved in advance.
Interestingly, the Japanese museum is open only to employees. While Hanseikai is a good idea, its important it be done in safe company, with people who will not judge but are interested in learning.
A public software-hanseikai exhibit would likely turn into a shop-of-horrors, an exhibit for its own sake?
https://www.jal.com/en/flight/safety/center/