Decentralized Exchanges (DEXes)
https://en.bitcoinwiki.org/wiki/DEXes
https://en.wikipedia.org/wiki/Decentralized_finance#Decentralized_exchanges
Decentralized Exchanges (DEXes) – are a new technology that facilitate cryptocurrency trading on a distributed ledger. The meaning of «decentralized exchange» is that instead of the one platform that process trades, it is engaged in blockchain.
分散型取引所(ぶんさんがたとりひきじょ、英: decentralized exchange, DEX)
https://ja.wikipedia.org/wiki/%E5%88%86%E6%95%A3%E5%9E%8B%E5%8F%96%E5%BC%95%E6%89%80