While on the one hand, Japan saw a rapid development in practices involving cryptocurrency from 2017 to the first half of 2018, on the other hand, cases of scandals involving cryptocurrency have sparked attention, such as the illegal hack and theft of the cryptocurrency NEM from the crypto exchange Coincheck. The crypto market is still developing, and we can expect to see a continuing increase in disputes involving cryptocurrency exchanges and coin issuers, with stricter regulation as a result. This lecture examined the latest trends in regulation and litigation related to cryptocurrencies and ICOs in the US. Some changes were made to the content of the lecture given at the NERA Annual Seminar in April 2018 to allow us to provide more complete information on trends in the US.