This is purely a product of US neocolonialism of Japan.

TBH you have to hand it to US imperialists. I can never decide which is their best foreign policy.

The Plaza Accords where they got the Japanese to turn up and sign a document saying "actually my currency is much stronger than the markets say it is" which prices them out of the global market, destroys their exports (and therefore industry) and sees their economy tank for 3 decades straight to the point they produce the hikikomori phenomena

https://kendawg.medium.com/how-the-plaza-accord-helped-the-us-destroy-the-japanese-economy-b4b24c20a9af

Or presenting the (Rockefeller funded) Limits to Growth as "real science" to a Chinese mathmatician who then goes back to China, bamboozles Deng Xiao Ping and Deng introduces the One Child policy which will cut the legs out of China's rise just as they enter their 2nd golden era

https://www.cambridge.org/core/journals/china-quarterly/article/abs/missile-science-population-science-the-origins-of-chinas-onechild-policy/65D2C3C2BFFBB0334CB0A04D35BC4146

https://www.mattridley.co.uk/blog/chinas-one-child-policy-was-inspired-by-western-greens/