Audio Bibles for the Blind
Free audio Bibles for the Japanese are available at Audio Bibles for the Blind website.
These are for blind people only. Just fill out their application/order form found on their website.
Asian Access is an interdenominational, evangelical mission agency that started in Japan way back in 1967. They have deployed short- and long-term missionaries to different parts of Japan and Asian countries. Asian Access features the following: headlines (news), country profiles, alumni, podcast, blog, videos, info on short-term missions, and many more. There are also downloadable information on their website.
Amazon.com is where you can buy Japanese Bibles and New Testaments in different versions. You can either visit their home page and type Japanese Bible or Japanese New Testament on their search engine. You can also find many Japanese Christian books at Amazon.com.