AtomicMari is the personal channel of Mari Takahashi. It was launched on January 1, 2013. The channel does not have a schedule or a certain video guideline. In the opening video, Mari stated "...perhaps where this channel is going isn't really clear cut just at this moment,". The channel currently has less than 250,000 subscribers and 15 videos. The last video was uploaded over a year ago.
- Mari's channel has a range of topics covered in her videos, from vlogs to dance videos to mail time and tags. She also has two basic Japanese lesson videos up, titled "Japanese Quicki"
- Most of the Smosh Games crew were featured in her "Quicki" videos, including Sohinki, Jovenshire, Lasercorn, and Wes.