Visit itself doesn't mean anything more than the Japanese training squadron commander visiting Baykar.Possible future home of Turkish EF Tranche 5 fighters if germany stops being stubborn and okeys the sale like all the other members of the consortium already have?
Acc. to rumours the Air Force wants Tranche 5 Eurofighter and that is the one the Brits are also offering to the TAF.
Funnily enough if there aren't anymore follow up orders for future EF production in germany could cease meaning the loss of jobs for hundreds if not thousands of people. And yet germany is still being stubborn for no good reason.
There was a visit , again, from TAF personnel to inspect the EF recently.
New Saudi order of 48 aircraft from BAE, Spanish order of 45 new aircraft from Airbus Spain and the German order of 38 new aircraft ensures the supply lines in German Airbus and other subcontractors stays open for another 10-15 years at least. A Tranche 5 happening or not mostly depends on UK and Germany ordering it.