Is Coincheck available in the United States?

Could you elaborate on the availability of Coincheck in the United States? Specifically, are US residents able to access and utilize the platform for cryptocurrency transactions? If not, could you explain the reasons behind this lack of accessibility? Additionally, are there any alternative platforms or services that US residents can utilize for similar cryptocurrency services? Lastly, is there any indication that Coincheck plans to expand its operations to the US market in the future? Understanding these details would greatly assist individuals interested in exploring cryptocurrency options within the US.