I can get data
with using Eikon App Studio API.
but I can not get data
How do I get data like "EJV..." Fields data?
@SAKAMOTO unfortunately this is not possible, unless you are using the HTML5 App Studio API. Alternatively, you can have a look at one of the COM APIs that is called DEX2. It allows requesting the reference data fields, such as EJV.C.MaturityDate. The tutorial for DEX2 can be found here.