I've never been bothered by airport security. About the only thing I don't like are the lines. TSA can be predictable, but not always the lines.
The default experience of flying domestic in Japan is much like Pre-Check, if not slightly better:
+ no limits on liquids but they must be scanned
+ no ID check, just valid ticket check (either scan QR code to open a gate or visual check by agent)
+ shoes can stay on
+ watches and belts can stay on
- laptops must come out
- budget airlines often staff the security line to weigh bags, to force overweight bags to be checked.