In Asia there are many people who use bitcoin, although there is a ranking, it always varies. The greaest influence of bitcoin is sensed to be in South Korea. There are 90% who knows about it, people in their 30s about 29.8% has purchased an account, people in their 40s about 26.3% knows and experienced bitcoin. South Korea ranked first followed by Japan who ranked 88% knows about bitcoin, claiming and assuming bitcoin was first invented by a japanese group in 2009. That is why it has been reported and the people in Japan was somewhat informed by the existence of it. Although bitcoin claimed to originate in Japan, South Korea still ranked to have the greatest influence of bitcoin in Asia.
It's true that South Korea is an important country and is affecting the Bitcoin market. But Chinese investors have a huge influence. China has a high concentration of Bitcoin miners too. The huge rise in the price of Bitcoin since one and a half years ago was mainly caused by Chinese investors trying to secure their wealth and keeping it out of the reach of their government. That's what mainly caused the initial price rise, and then it all turned in to a speculative investment that all people around the world joined in on.
The topic of what influence Asian governments are having is that they are causing a reduction in the price of Bitcoin. It was especially South Korea imposing very strict regulations on Bitcoin a few months ago that made the price go lower.
Many countries in Asia don't like Bitcoin at all. They do like the technology and the concept though, but they want it to be regulated and to be under their governance. Most of them are working on issuing their own cryptocurrencies.