Our World In Data sites a 2015 study [1] which in turn cites an 2012 World Bank report [2] for some of its data, including the numbers for Japan. This then in turn cites OECD data without a solid link, but a search and some digging leads us to [3]. This data is acquired through questionnaire (there's some info available in the data explorer), so the trail runs cold there.
I did cross-check with the numbers of the Central Bureau of Statistics of the Netherlands, and the overall waste production matches: an average 532 kg of waste per capita, ~17 million people leads to about 9000 million tons of waste per year.
However, I cannot find the fraction of plastic waste on the OECD site anywhere. If I use the Dutch CBS data (counting "Kunststof verpakkingen", "PMD-fractie", and "Harde plastics"), the Dutch fraction of municipal waste that is plastic-related seems to be only about 4%, which is 5 times fewer than the World Bank report lists.
How is that counted? The last time I was in Japan they still separated "burnable" and "non-burnable" waste. So if you burn the plastic, does it still count as waste?
IMO plastic is not that bad if it gets recycled or used as fuel source in power plants instead of becoming landfill.
Maybe we have more industrial plastic waste than Japan? My experiences in Japan are that they use many times more plastic packaging on products than we jse in the US. I find this data extremely hard to believe.
If I had to guess, it’s probably we (as in the US) consumes more. One takeout meal for my family is probably more plastic in weight than your grocery runs. My plastic foldable table is probably your annual amount. While it seems wasteful, plastic bags are very minimal compared to other items.
Although I agree that Japan uses lots of plastic everywhere, I can see how the sheer size of stuff in the US can easily offset for that. The average American man weighs 50% more than the average Japanese man (200 lbs vs. 135). The average househould trash container in the US is the size of a garbage truck in Japan (being dramatic with this one, but less than you'd think).
The trash cans I have seen in Japan are roughly the same size as the ones I see in the US. The garbage trucks are smaller (to fit on smaller roads).... but they have a lot more of them!
Go to Costco in Texas and watch the literal pallets of bottled water the people cart into their trucks. They make up for entire Japanese towns probably.
People in the US go through a lot of individually bottled water bought in large quantities--including in many many areas where the tap water is perfectly fine.
On the other hand there are vending machines for various drinks (not all in plastic admittedly) on almost every other Japanese street corner. So I'm not sure how it averages out.
Our World In Data sites a 2015 study [1] which in turn cites an 2012 World Bank report [2] for some of its data, including the numbers for Japan. This then in turn cites OECD data without a solid link, but a search and some digging leads us to [3]. This data is acquired through questionnaire (there's some info available in the data explorer), so the trail runs cold there.
I did cross-check with the numbers of the Central Bureau of Statistics of the Netherlands, and the overall waste production matches: an average 532 kg of waste per capita, ~17 million people leads to about 9000 million tons of waste per year.
However, I cannot find the fraction of plastic waste on the OECD site anywhere. If I use the Dutch CBS data (counting "Kunststof verpakkingen", "PMD-fractie", and "Harde plastics"), the Dutch fraction of municipal waste that is plastic-related seems to be only about 4%, which is 5 times fewer than the World Bank report lists.
[1] https://www.science.org/doi/10.1126/science.1260352
[2] https://openknowledge.worldbank.org/entities/publication/1a4...
[3] https://data-explorer.oecd.org/vis?fs[0]=Topic%2C1%7CEnviron...
[4] https://www.cbs.nl/nl-nl/cijfers/detail/83452NED?dl=41FD6