Incombustible Waste (燃えないゴミ - Moenai Gomi)
The 'non-burnable' or 'incombustible' waste category for objects that cannot be safely incinerated. This includes metals, glassware, ceramics, batteries, light bulbs, and small electronics like hair dryers.
Separated to prevent damage to advanced clean-burn incinerators, and to secure hazardous substances like mercury in batteries. It keeps landfill ashes completely non-toxic and environmentally safe.
Wrap broken plates or glass in newspaper, write 'DANGER' (キケン) clearly on the bag, and drop it on the designated day (often once/twice a month). Spray cans must be fully emptied to prevent fire accidents.
What is the correct safety etiquette when discarding broken glass or ceramics as non-burnable trash?