Not really. At the outbreak, very few people were wearing masks ( mainly because the government was lying to the population ). When they finally ordered people to wear masks, there were many people that ignored it.
I haven't seen any evidence to suggest that the percentage of people wearing masks while doing anything other than taking public transit or walking on city streets was higher in Korea, Japan, or Taiwan than it was in China before the COVID-19 outbreak.
Wearing masks is not a bad idea, but it is not what was primarily responsible for the success Taiwan, South Korea, and Japan initially had in fighting the COVID-19 epidemic.
Based on my experience the number of people wearing masks in public pre-COVID-19 would have been slightly higher in Japan than China, but was still a small enough percentage of the population that it would not have made a significant difference in virus propagation.