It is open now:
https://coin.z.com/jp/index.htmland already meeting a large demand for bitcoin
GMO Click Securities (the company) has estimates that the market size in Japan for cryptocurrencies will grow to 1 trillion yen daily volume, or US$8.7 billion daily within a few years.
Z.com Coin is offering two types of account plans for users, referred to as “Simple” and “Full Access.” With Simple, the website doesn’t ask for much identifying information, so customers can get set up quickly. However, they can only treat the exchange as a cryptocurrency wallet where they can buy coins, make deposits, and withdraw them again.
The Full Access accounts require Know Your Customer (KYC) and Anti Money Laundering (AML) documentation, but permits users to deposit and withdraw Japanese yen, and trade on both of Z.com Coin’s trading services.
The company is initially offering a Bitcoin wallet and two markets for their customer to trade. The first is a Foreign Exchange market that allows Bitcoin to be traded for various fiat currencies, called the “virtual currency FX” market. Traders also have access to margin trading, an already-very popular market type for Z.com, according to the announcement.
The other market is a more traditional Bitcoin exchange, which they simply call their “virtual currency” market. The service allows anyone to buy bitcoins for Yen, and potentially other cryptocurrencies like Ethereum in the future, and send them to their Z.com coin wallet. As with the now competing exchange BitFlyer, trading fees on the Virtual Currency market are zero.
source:
https://bravenewcoin.com/news/japans-largest-forex-market-opens-bitcoin-exchanges-to-overwhelming-demand/