My Guess is because of the WebX 2025 conference in Tokyo, the event highlighted DIMO's strategic expansion into the Japanese market and a few other developments. That could have boosted investor confidence. We saw those spikes followed by cool downs for some other DePIN projects too in the past.
one of the DIMO founders posted this:
https://x.com/robmsolomon/status/1961112366365466746
edit: $20M buy of $DIMO