Oil Heater Problems need help

My wife and I just bought an oil heater, but after we got home I realized we have tatami floors. I completely forgot about it and now I’m worried the heater might damage or burn the tatami.

Our heater does have a stand bracket, but I still can’t find a proper heat‑resistant mat for oil heaters here in Japan. We’ve looked around shops and online, but the only ceramic tiles we find are for walls, not floors — and nothing rated for heater use.

by DonM0en