River uses a two-minute time loop to create an inventive science-fiction comedy in a Japanese inn. Junta Yamaguchi follows Mikoto and the people around her as repeated returns to the same moment turn an ordinary setting into an increasingly unusual challenge.
Makoto Ueda's script finds humour and more thoughtful possibilities within that simple rule. The repetition provides a structure for surprises without making the film feel mechanical. Romance and a touch of the supernatural add further interest.
The ensemble has an appealing naturalness. Riko Fujitani gives Mikoto a grounded charm, making her the emotional anchor amid the increasingly strange events. The chemistry keeps the people engaging alongside the clever premise.
Long-take sequences are a notable technical strength. Their immediacy draws the viewer into the action and demonstrates how carefully the concept has been staged. The execution supports the comedy rather than becoming only a display of skill.
Yamaguchi combines the structural invention with lightness. The film understands that a time-loop story can offer emotional connection as well as a puzzle, allowing the characters' reactions to matter as much as the repeated situation.
River is a funny, light and thoughtful experience that finds originality within an established idea. Its cast and confident execution make the inn a rewarding place to spend time, even when the clock refuses to move forward. Viewers who enjoy unusual science-fiction comedy should find plenty to appreciate.