A couple of examples
No interest: A typical interest rate is 0.015%. No that is not a misprint. It's X * 0.00015 annual interest rate (https://www.boj.or.jp/en/statistics/dl/depo/tento/te180516.p...)
No checks: Not sure about other countries but in the USA sending a check to someone usually costs nothing. In Japan checks really don't exist. Instead to send money you do a bank transfer which costs anywhere from $3 to $8 per transaction. For a regular person they might only have 1 payment like that (rent). But for a company that adds up quick. Electronic payment (sign in to your bank, send payment) uses the same $3 to $8 per transaction system.
Byzantine hours: I recently got a business bank account and signed up for the online banking (costs extra). I'm only allowed to send payments from 8am to 3:30pm.
ATMs are still not 24hrs. 7/11 (Shinsei Bank?) and a few others open 24hrs. Most ATMs still close at some point ever day. MUFG ATMs are currently 7am to midnight.
Japan is still a very cash oriented society. They do have things like Felica (digital cash) but getting around with paper cash is not easy. Note, I don't mind the cash thing since cash = anonymous but I know lots of foreigners east and west that are surprised as they can generally get by cashless in their own countries but not here.
I'm not even scratching the surface. I'm sure the people in power and regulations in place make it nearly impossible to fix the system but someone one out there must have a way.