A partial answer: Googling 'japan fax' would give you many articles attesting that faxes are still a stable for communication in offices.

e.g. https://www.independent.co.uk/news/world/asia/coronavirus-ja...

> Japan’s health ministry has said it will allow health centres to report new coronavirus cases online, instead of by handwritten faxes, after a doctor lambasted the legal requirement.

Another very externally visible example is that the Japanese have taken a long time to transition from SHIFT_JIS to Unicode on the web, and on Windows.