How big is the Japanese search market exactly? Japan is the 3rd biggest country by the number of Internet users. See other statistics from Japanese government and research organizations.
The summery of online advertising market in Japan in 2008. Review the market from display ads, text ads, ad portals, etc. Also information about "Internet advertising Value Index Project" by major online businesses in Japan such as Yahoo and Microsoft.
Motoko Hunt's interview about search engine optimization (SEO) and search engine marketing (SEM). Her view on search industry, techniques, trends, etc.
My interview with Google Blogoscoped about Search Engine Optimization in Japan. I had fun doing it, and glad to hear some great feedbacks. I hope it would encourage people to consider Japan as their main target market.
We can all learn from the top 20 things Japanese hate about corporate websites. It shows typical web site design and structure problems, and how the site owners and webmasters don't care about the usability of the website.
Online population is maturing in Japan. The 50+ users now makes 23% of online population and the share is growing. We don't see many of them on SNS sites and social medias just yet, so what are they doing?