Impress R&D has just started selling the results of their most recent quarterly survey. The polling took place in December, with the survey respondents drawn from the readers of OnDeck Weekly, a digital trade magazine which (I think) covers the Japanese digital publishing industry.
I don't have a copy of the report, but I do have the one detail that Amazon now dominates the Japanese ebook market. This does not bode well for Brazil, China or India, other markets which Amazon recently entered. Amazon is likely going to dominate those ebook markets as well, thus reinforcing the situation some publishers fear.
Update: I have a new source with more details from the report:
A full 40 percent of those polled are actively buying books via the Kindle e-book store, according to the data from Impress R&D, the research arm of a Japanese publishing house. That is three times the 13.4 percent who said they buy books from BookWeb, the online bookstore run by national book chain Kinokuniya.
Sony's Reader Store was next at 10.1 percent, followed by the e-book offering from online shopping mall Rakuten at 7.4 percent. Both Sony and Rakuten offer e-reader devices that compete with the Kindle, as well as apps for reading their titles on mobile phones and tablets.
Many observers in Japan feel that 2013 is the year that the domestic e-book market, which has lagged markets like the U.S., will take off. Impress predicts the market, which was ¥62.9 billion (US$720 million) in the year through March 2012, will over triple in the next five years.
What's most interesting about those stats is that Kobo only has a 7% share of the Japanese ebook market. That's not exactly stellar success, is it?