This document provides an introduction to ICO promotion in Japan. It discusses factors that determine the success of ICOs, including the power of management, development community, and public interest. It analyzes characteristics of Bitcoin holders in Japan and estimates the population who have attained $1 million or more from cryptocurrency trading. The document lists influential Japanese cryptocurrency bloggers and Twitter accounts and emphasizes that word-of-mouth promotion through local media and key opinion leaders is crucial for successful ICO promotion in Japan given that most Japanese read only domestic articles and blogs. Communication should be focused on local communities and individual investors rather than a few major accounts globally.