Don’t really know which episode this would best fit into, but speaking from a Singaporean perspective, there was a lot of support for the mainland Chinese against the Japanese in the Sino-Japanese War originating from here. The Chinese immigrant population consisted of many rich merchantmen and philanthropists who helped by war bonds and donated money back home. Some even organised boycotts of Japanese goods and attacks on the Japanese to show their resentment. The Communist Chinese established the Nanyang Communist Party in 1928, based in Singapore, which later became the Malayan Communist Party. This prompted the colonial government to ban the Party as well as the sending of funding for Communist China. Additionally, press censors and tight immigration restrictions were put in place. To further restrict the spread of anti-colonial sentiments, aid to Chinese and Tamil schools was cut off.
When the Sino-Japanese War began, Chinese agents from the United Front used the Singapore Chinese Chamber of Commerce to set up boycotts against Japanese goods. They also began to boycotted shops run by other races that sold Japanese goods and Chinese merchants who ignored the boycott were severely punished by extremist groups. These were highly effective due to Singapore/Nanyang being a major British port in the region. The boycotts led British authorities to crack down on anti-Japanese elements, partly because they led to social unrest and reduced the port’s income.
Hopefully this helps for the early 1930s episodes, especially on how the British actually helped the Japanese by greatly limiting support for mainland Chinese which would otherwise be coming in from the Straits Settlements.