Investing.com - Two new Japanese cryptocurrency exchanges are up and running. Bitbox, launched by messaging app Line, offers crypto-to-crypto trading in 28 currencies, including Bitcoin, Bitcoin Cash, Ethereum and Litecoin. The platform supports trading in 15 languages, and is open to investors around the globe, except in the U.S. and Japan, where Line is still trying to clear regulatory hurdles.VCTRADE, launched by financial services firm SBI Holdings, offers yen-based trading in three currencies--Ripple, Bitcoin and Bitcoin Cash. Trading is open only to investors in Japan. Japan made Bitcoin legal tender in 2017, triggering a surge of investor interest in cryptocurrencies.Some 3.5 million people traded cryptocurrencies on Japan's 17 exchanges in the first quarter of this year, according to a government report.