Not at all. I recommended a Naruse film with a similar theme because, in spite of everybody claiming Koreeda was inspired by Ozu, I feel stronger Naruse vibes than Ozu vibes from his movies.
Like Father, Like Son isn't a favorite of mine but I liked it more than
Shoplifters and it's probably the closest to
Shoplifters in terms of the plot even though it's less intricate. I also recommend
Our Little Sister. It's nothing like
Shoplifters but a great film on its own and one of my favorites from Koreeda. I remember seeing it at the cinema and I was the only person watching it. Haha. Good memories. As a matter of fact, every Koreeda film is worth seeing, so you can just as well watch his entire filmography chronologically.
But yeah, I recommend watching some classics from Ozu, Naruse, Mizoguchi, Shimizu, Shimazu, Yamada, et al. WARNING: these films might temporarily make you feel like all contemporary films suck, so be warned! It's always good to know the past to properly interpret the present. It's not really about seeing a given theme recycled and liking a new film less because of that, though. Ultimately, it's about how they handle the theme and you don't really have to be original to be great. It's good to be learned about something you find inspiring. When I watched Werckmeister Harmonies back in 2011 I decided to seek and watch more films that will make me feel the same thing I felt when watching Harmonies, and this kind of enthusiasm made me a cinephile. You gotta follow your enthusiasm started by
Shoplifters and deep-dive into Japanese cinema as hard as you can, and do it now that you feel it because once it's gone you might not want to do that anymore.
As far as new films go, I was destroyed by
Rebirth (2011). To some extent, it's similar to
Shoplifters plot-wise, but then again it's completely different. The ending made me very emotional.