Artist's commentary
It's actually made out of foam
Getting way too much into the spirit of GOCHI WEEK.
Sakura Chiyono O in a event costume.
Golden Week 2024 bought both "GOCHI WEEK", an internet-based cooking event involving Sakura Chiyono O (among others) and hand puppets as well as the "Uprising" in-game event, themed around Warring States Period warfare in the modern day.
Thus, Chiyono O dressed like a ninja, planting her foam sword as if she was planting a carrot into the fried rice dish.