Hiro Arikawa, The Traveling Cat Chronicles, translated by Philip Gabriel.
Traveling Cat is about a cat (naturally) whose owner is trying to find him a new home. Nana, the cat, is too clever for this, and manages to find ways to make this impossible. I won’t spoil why the man wants to get rid of the cat, which builds slowly, but it ends up quite a heartwarming story.
It’s generically something called “light fiction,” which is in Japanese publishing somewhat like YA, but it doesn’t read as so YA. There are occasional moments of what you might call heavy-handedness, but the story is sweet and moving. And anyway, though I don’t personally read much YA, the genre gets unfair treatment by snobs.