To be fair Japan is a collectivist culture whereas the UK is an individualist one. That is hard to change.
I know they're not the same, but they share much in common. Not least their ideogram-based writing system with many of the same characters' meanings (derived from Chinese).
China is also a collectivist culture and it's interesting to see how a rule gets adopted in East Asian society.
I have seen this happen regarding many things on the public transport system, such as eating on the Beijing Subway (to give just one example).
East Asian society is shame-based - order is imposed through fear of shame (loss of face); Europe is guilt-based (from Christianity).
In East Asian society, first of all, absolutely everyone ignores the rule (it is common for people to eat their breakfast on the subway commute). In Christian Europe, a significant number of people read and respect the rule.
Then, in East Asian society, a few heavy penalties are dished out very publicly to transgressors ("kill a chicken to scare the monkeys"), who have to endure serious loss of face in a train carriage, or worse, on a news report about a particular public behaviour crackdown or viral video. Everyone thinks "I don't want to be caught doing that" and almost overnight everyone starts following the rule. Further adherence is guaranteed by stares and passive-aggressive nudges from other citizens if anyone breaks the rule. Again, an individual hates the shame of being visibly shamed.
In Europe, more and more people adopt the rule as they become aware of it and see it as 'the right thing to do'. So we are left with a few transgressors who traditionally the authorities (guards, police or whoever) would have penalised, but really this doesn't happen in the UK any more (too many rules? not enough enforcers?)
I don't know whether it's better to live in a shame-based society, where people conform through fear of loss of face, or a guilt-based society, where mostly good people do the right thing because they think it's the right-thing to do. I think possibly the latter in some ways.
Currently, China's otherwise excellent long-distance trains are way worse than the UK's for nuisance beeps and people watching TV loudly on their smartphones. But when the authorities decide to change that, that too will be like 'flicking a switch'.