March 22nd 2024, limited Tokyu Corporation 5050 series 4000 series. At first sight it looks like a straight re-issue of the 2013, 2017 and 2022 train, but the press release seems to be saying that it will have a newer AA cell chassis instead of the old C cell chassis. And it will come in a new box.
https://tokyu.com/items/60ee74bfe45a992204f1b5c5
https://tokyu.com/items/60ee74bfe45a992204f1b5c5