Bitbank is one of the leading cryptocurrency exchanges targeting the residents of Japan. The exchange tab of the website is not available in languages other than Japanese and those who want to register on Bitbank from overseas have to pay $100 commission. Nevertheless, for those in Japan, this platform is quite convenient as it collects no deposit and trading fees (it’s relevant only for Makers) and has some other nice features.
DDEX uses a hybrid model decentralized exchange, where no user account is created. It also describes itself as a most advanced margin trading platform on Ethereum.