Coincheck Exchange:
https://coincheck.jp/supports/coincheck-exchange-englishhttp://themerkle.com/bitcoin-exchange-coincheck-brings-ethereum-to-japan/https://www.reddit.com/r/BitcoinMarkets/comments/4bm0rh/coincheck_bitcoinether_exchange_now_supports/About Coincheck:
Coincheck started in August 2014 and is operated by ResuPress, inc (founded in 2012). As of February 2016, the exchange had over $28 million transactions/month.[4][5][6] At this time there were more than 1,300 merchants using their bitcoin payment solution just in Japan.[7] Also, Coincheck is a member of JADA(The Japan Authority of Digital Asset) and is actively helping to build the Japanese Bitcoin community’s usage standards with the government.
In March 2016, the entertainment company DMM.com with user-base of more than 19 million decided to use coincheck's bitcoin payment processing solution.[8] Coincheck also partnered with SEKAI to support Chinese, Hong Kong, and Taiwan investors to buy Japanese real estate with bitcoin.[9][10] The company also supports buying/selling of ether.[11]
https://en.wikipedia.org/wiki/CoincheckAbout Bitcoin market in Japan:
Japan’s governing Liberal Democratic party is planning to propose legal changes that would define bitcoin and other cryptocurrencies as currencies.
The changes would mean bitcoin could be more tightly regulated and taxed, and are likely to lead to more investment in developing cryptocurrency infrastructure in Japan.
http://www.theguardian.com/technology/2016/feb/25/japan-to-make-bitcoin-legal-currency
