Big market, similar culture, high ARPU, this is what you hear about the Japanese market. But is it all true? According to Jason Wi, Senior associate of Softbank Ventures Korea, 80% of their portfolio companies are now seeking opportunities in the Japanese market, or have already entered. TechCrunch Japan will hold TechCrunch Tokyo 2014, November 18~19th in Tokyo. This event presents a great opportunity for startups from around Asia to explore the opportunities that…