This forum is moderated by technical staff so I would suggest you to ask content question(what is the field name in this question) to my Refinitiv helpdesk at this URL.
For this question I think you can find the content field by following below steps:
1. click on i (information) on the sheet to get the field name
2. Go to Eikon Search bar, type in DIB (for Data Item Browser)
3. Input instrument 7203.T
4. Follow 4 steps in this picture to get the field name
Note, you can adjust parameter according to your requirement.
5. Now, you can use it in Eikon Data APIs