The Japanese had drunk the US Kool Aid on a global security system underpinned by the US Dollar at Washington in 1921. This all went to 5hit with the Stockmarket crash and depression.& whats the attitude of the US banks and government? New York had replaced London as the source for Japans investment capital & Japans international transactions were often via US/New York banks. In 1934 the Roosevelt administration ceased backing loans to German industry and government in response to nazi financial and political shenanigans. Would the US do the same were Japan to start a war with the USSR?
The US government had trouble getting US banks to toe the line as the banks just wanted to make money with confidence. They could get that by funneling money to Japan who then invested in Manchuria. Investing in China directly was more risky.
The US was very weak in responding to Japanese aggression. US cities were going bankrupt, banks failing, civil strife etc. The initial idea was to pull out of the Washington Naval Treaty but the US ended up by recognising the Soviet Union as this had a bigger impact on Japan.