Garbage Day (Gomi no Hi)

What Is Garbage Day?

Every year on May 3, Japan observes "Gomi no Hi" (Garbage Day). The date comes from the wordplay "go (5) mi (3)" sounding like "gomi," the Japanese word for garbage or trash — a date that's widely known simply because it's easy to read this way. The organization that established it is unclear, but it is introduced as a day that, through this wordplay, draws attention to "garbage" and "waste." It's an opportunity to think about where the garbage we generate every day actually goes and how it's processed.

How Garbage Is Processed

The garbage we throw out is handled according to set rules.

• The purpose of sorting: In Japan, garbage is sorted into categories such as "burnable," "non-burnable," and "recyclable" so that incineration, landfilling, and recycling can each be carried out more efficiently. Sorting aims to reduce environmental impact and make better use of resources.
• Why incineration is so common: Partly because it is difficult to secure landfill sites, Japan is said to rely heavily on incineration, which greatly reduces the volume of waste.

Recycling Basics

Some of the garbage we discard can actually be reused as a resource.

• Container and packaging recycling: Plastic bottles, cans, glass bottles, and paper cartons are collected and recycled under Japanese law. This reduces the need to extract new raw resources.
• Recycling rates: Collection methods and recycling rates vary by municipality, but generally speaking, the more precisely garbage is sorted, the higher the proportion that can be reused.

Things Worth Knowing About Garbage

• The bulk of household waste: Food scraps and paper make up a large share of the garbage that comes from households.
• The plastic problem: Plastic is hard to break down and tends to remain in the natural environment for a very long time.
• The limits of final landfills: Japan's final disposal sites have limited capacity, making waste reduction a shared challenge for society as a whole.
• Why sorting rules differ by municipality: Under the Waste Management and Public Cleansing Act enacted in 1970, municipalities draw up their own plans for handling household and other general waste according to local conditions.
• Recycling in the Edo period: In the Edo period, used paper was collected and re-made into new paper, such as tissue paper.
• Reduce and reuse: "Reducing" and "reusing" are considered even more fundamental concepts than recycling, sitting further upstream in the waste hierarchy.

Things to Think About on Garbage Day

• Check the types and amounts of garbage your household produces, and get a clear picture of your current situation
• Review your municipality's sorting rules and collection methods
• Look into the differences between disposable products and long-lasting ones
• Check what recycling symbols mean so you can sort items correctly

A Day to Understand What Happens After You "Throw It Away"

May 3's Garbage Day isn't simply about cleaning or tidying up. Garbage doesn't disappear the moment you throw it away — it goes through a process of collection, transport, and treatment, all managed within society. This anniversary is a chance to better understand the systems behind waste processing and resource circulation, which we rarely think about in daily life. By broadening your view from the trash in front of you to the systems of society as a whole, this day can offer a thoughtful opportunity to rethink your everyday habits.