Japanese people seems not to like to exhibit their strong point too much. The famous proverb in Japanese "出る杭は打たれる nail sticking up ready to be hammered" means like "he who stands high is seen from afar". The proverb show that anyone should keep off standing out too much and symbolize Japanese character well. Japanese people have been traditionally good at cooperative work but individual work. This culture seems to trace their roots to rice cropping. The rice cropping in which more than 90% of Japanese people was involved needs manpower, for example, the control of agricultural water, etc. Such a collective work called on the balance of individual work and got hedge if the product of themselves was short. In this case, one effective person's power is tiny with all things considered.
Additionally, the individual person strongly belongs to their family and the assessment of individual was directory linked their families one. And in such a situation, the transfer of personnel was limited and they faced the same person repeatedly. So they brought up their strong commonsense, and they could imagine the thought of the others even if the others expressed with ambiguity or indirect. And this skill was necessary to keep their assessment good and to live in Japanese society well.
Because of such a reason, the reserved and modest got the virtue of Japanese, and they want to show they are nothing particularly remarkable. If the person who are not so like me, most of Japanese people think the person is childish or strange.
In some aspect, the skill imagining the others thought is impeditive to globalize. But, even if I don't put it into words clearly, some people understand me. Once I recognize this happiness and comfort, it is difficult and sad to break with it.