Doraemon X 10 Hot -

In one story, Nobita accidentally uses it to cut through a bank vault (don’t ask), but the real heat comes from the gadget’s downside: it overheats after ten seconds and explodes. The suspense of using it is hotter than the beam itself.

Given the structure ("X 10 hot"), it most likely refers to one of the following niche contexts: Social Media Captions/Slang:

The phrase "doraemon x 10 hot" likely refers to features within the fan-made, adult-oriented game Doraemon X APK