Why does Kamikatsu sort trash into 45 categories?

Kamikatsu, a small mountain town in Tokushima Prefecture, declared a Zero Waste pledge in 2003 with the goal of eliminating incineration and landfill. The town concluded that maximum recovery required a granular separation: paper by type, metals by alloy, plastics by polymer, glass by color, batteries, fluorescent tubes, used cooking oil, and so on. The category count has shifted over the years, hovering around 45 as of recent reports. Residents bring sorted waste to a central Zero Waste Center rather than curb pickup.

How many categories does Tokyo use for household trash?

Tokyo is administered by 23 wards plus surrounding cities, and each one publishes its own waste sorting rulebook. Most run somewhere in the range of 10-20 categories — typically combustible, non-combustible, plastic containers, PET bottles, cans, glass bottles, paper recycling, and several oversized or hazardous categories. The fine-grained rules differ between wards, which is why Tokyo residents who move within the city often have to relearn the local sorting system.

What happens if I sort my Japanese trash incorrectly?

Collection crews leave incorrectly sorted bags on the curb, often with a sticker explaining the issue. The bag is the resident's responsibility to bring back inside, re-sort, and put out on the next correct collection day. Apartments sometimes have a building manager who polices this. In small towns it is socially noticed; in Tokyo it tends to be administrative rather than confrontational, but persistent miscategorization can result in formal warnings.

Today I Learned

A Japanese town, apparently, sorts its household trash into 45 separate categories

Kamikatsu in Tokushima asks residents to sort waste into roughly 45 categories on the road to zero waste. Tokyo wards typically run 10-20. Both have reasons.

Published 2026-04-30 · 3 min read · By Daichi

◇ A row of clearly labeled wooden bins at the Kamikatsu Zero Waste Center in Tokushima, each marked with a different recyclable category in Japanese and English

Forty-five buckets in a mountain town

Drive into Kamikatsu, a small town tucked into the mountains of Tokushima Prefecture, and the first civic building you will pass is not a town hall or a school. It is the Zero Waste Center, an architecturally striking timber building whose interior is, essentially, a giant labeled rack. Residents arrive with sorted bags, walk along the rack, and drop each fraction into the correct bin: clear glass here, brown glass there, aluminum cans separately from steel, PET bottles separately from their caps and labels.

The category count is roughly 45. Most other Japanese towns are somewhere between 10 and 20. The rest of the world tends to land at 3 to 6. This is the most extreme version, in the country with the most extreme reputation, of a mostly real phenomenon.

The fact

In 2003, Kamikatsu became the first municipality in Japan to declare a Zero Waste pledge: a goal of eliminating incineration and landfill by maximizing reuse and recycling. To make that work, the town progressively split its waste streams into finer categories. The number has fluctuated as the program evolved; recent town and media descriptions cite roughly 45 separate categories, organized across paper, metal, plastic, glass, fabric, hazardous, and a “give it away” reuse shop.

Larger Japanese cities run far smaller schemes — Tokyo’s wards typically use about 10-20 categories depending on ward — but they are still strict by global standards. Combustibles, non-combustibles, PET bottles, plastic containers, cans, glass bottles, and paper recycling are nearly always separate streams, with strict pickup days for each.

Why it works this way

A few forces stack:

No incinerator economics. Kamikatsu does not have its own incinerator, and contracting out trucks to haul waste to one is costly for a town of around 1,400 people. Recovering as much material as possible is genuinely cheaper than trying to burn or bury it.
National recycling law. Japan’s Containers and Packaging Recycling Law, passed in the 1990s, makes producers and municipalities jointly responsible for recovering specific material streams. Cities that meet sorting targets receive better cost outcomes; cities that do not, do not.
Cultural compliance is achievable. Kamikatsu’s program would not work in a city of 14 million. It works in a small town where every household knows the staff at the Zero Waste Center and where missorting is socially visible. Tokyo’s 10-20-category version is calibrated for what an apartment building of strangers can actually maintain.
The reuse layer. A meaningful share of what enters the Kamikatsu center is not recycled but re-used — clothes, kitchenware, books — through a free-exchange shop on site. The category count includes those streams.

Where to see it

Kamikatsu Zero Waste Center, Tokushima. The building is open to visitors. Guided tours explain the category rationale and let you see the bins in use.
Any Japanese ward office. Pick up the local waste-sorting calendar — it is the most under-appreciated piece of Japanese design, with pickup days color-coded by category and illustrated examples.
Kamikatsu’s Hotel WHY, attached to the center, lets visitors stay overnight and experience the sorting process firsthand.

Closing

Most countries treat trash as a logistics problem to be hidden. Kamikatsu turned it into civic architecture and asked everyone in town to memorize 45 buckets. Apparently, if you sort hard enough, the problem goes away.