Although this "Droste no hate de bokura" aka "Beyond the Infinite Two Minutes" predates "River, Nagarenaide yo" by three whole years, I actually watched them in reverse chronological order and at the end I couldn't help but think that this one must have been, like, the director's "rehearsal" before he could finally come up with that masterpiece that is "River,...".
Both works, in fact, share the same fascination with time loops and the technical prowess required to portray them through sequence shots. And of course they are from the same director and share a relevant part of the cast.
I personally think that the story here is just a lil' bit weaker, and the setting a lot less fascinating (let's be honest: beautiful ryokan in the hills around Kyoto beats small family restaurant/café in an anonymous city side street any day of the week!!! ^_^;;;....), hence my grade.
It's still another wonderful movie I can wholeheartedly recommend, though! 9/10