It depends on the contract stipulations. Perhaps Plarail wants to focus more the Japan railway instead since they have the monopoly of the Japan Toy train market more or less
My Trackmaster/Tomy/Plarail Photo Gallery Page (over 600+ photos and still under construction)
https://www.flickr.com/photos/183311600@N03/
https://www.flickr.com/photos/183311600@N03/