Yes, this is little old news. The renovation of Itami Airport (Osaka) terminal building was completed past August.

The current terminal buidling of Itami Airport was constructed on 1969, to conincide with 1970 Osaka Expo, world fair. The age of the terminal bulding reaching 50 years plan was to undergo complete renovation of Itami Airport terminal building. The renovation started on 2016 and the renovation was completed this year and on August 5 there was grand reopening ceremony of Itami Airport terminal buidling.

Basic arrengement of the terminal remained same, North Terminal remain primary JAL and South Terminal remain primaiary ANA. The big difference for passenger experience is that after the passenger security at both North Temrinal and South Terminal, passengers has to walk through the shopping area before reaching to gate area. I have seen such setting a lot at airports in Europe, but Itami Airport supposed to be first airport in Japan to adopted such terminal setting.

I know such setting has mixed review, some passengers like the arrangement, some passengers can care less, then some passengers would like to reach the gate area with minimal walking distance. Side note, circular terminal building of DFW Airport build in '70s had the design concept of minimal walking distance from check-in to the gare area.

Considering Omiyage culture of Japan more passengers may find such setting more usuful than nuisance. We will see such airport terminal setting will catch up in Japan or not.