Amazon.com Inc. has made its electronic-book reader, Kindle, available in Japan, whose e-book market has grown sharply in the past few years.

Amazon is confident of getting into the Japanese market, which has been dominated by cell phones in terms of electronic reading devices, with a goal of providing Japanese-language content in the future.

Some people in the industry say Kindle's participation will energize the field and that they will be carefully watching if the device is accepted, especially in a market where providers still find it challenging to collect good content.