I just finished the latest season of Aggretsuko and surprisingly there was an end-credits scene??? I didn't expect it, considering they don't do end-credits scenes. Nothing big, though the promise of her returning in season 5 was nice.
You COULD call it a mid-credits scene, since the credits were still rolling, but it ended at the same time as the credits. At the very least, it's not an after-credits scene.