Well I think is interesting. As part of their Future Soldier Program, the Advanced Combat Infantry Equipment System, the JSDF are modernizing their Howa Type 89 service rifles.
As part of the improvements, the modernized rifles have a full length top rail on their receivers, replacing the stock fixed iron sights and allowing for easy attachment of optics like back up irons. The barrel has been shortened to a carbine length of 14 inches/35.5 cms, from the original 16.5 inch/42 cm.
Of course, the most notable improvement is the installation of Bushmaster ACR style folding stocks. Whether these are simply replicating the design or licensed is yet to be known but certainly an improvement to their original solid stock. Finally, the proprietary rails of the rifle allow for control of electronics through the foregrip. Ideally, it's used between the proprietary scope and foregrip to switch between day and night sight.
IMO, this is awesome that Japan is advancing it's military technology especially with what's been going on. What I also find interesting about the Type 89 is that it's probably the only rifle still in service that is a licensed AR-18, not a clone/copy or based on the design. I'd love to see more modernisations of other military service rifles out there but we'll most likely only see more and more countries replace their native weapons for a common platform like the AR-15 or Kalashnikov, in a way this is where the Cold War's legacy continues on in our times.