Two motions were passed, firstly the urge the government to improve the national shipping service and train Indonesians to be sailors, and secondly to set up as many party branches as possible.

Newspaper articles from the period 1935-42 remarked on Parindra’s bizarre practice, but it was only officially banned in 1941, as colonial authorities became increasingly uneasy about the prospects of a Japanese invasion.

In 1941, Mohammad Husni Thamrin died, five days after he was put under house arrest by the Dutch colonial authorities after being suspected for supplying information to the Japanese.

The interest and sympathy of the Indonesians were overwhelming.” During his burial ceremony, with a militaristic style, Soekardjo Wirjopranoto – an influential Parindrist, march through Soerja Wirawan youths performing the salute, which is allegedly a name with Pro-Japanese tendencies.

[7] In May 1939, Thamrin was the main driving force behind the merger of Parindra and seven other nationalist organizations into the Federation of Indonesian Political Parties (Gaboengan Politek Indonesia, GAPI).

Parindra's activities were increasingly supported by the then Governor General of the Dutch East Indies, van Starkenborg, who replaced de Jonge in 1936.

When Dr. Soetomo died in May 1938, his position as chairman of Parindra was replaced by Moehammad Hoesni Thamrin (MHT), a merchant and Volksraad member.

Before becoming chairman of Parindra, Moehammad Hoesni Thamrin had established trade contacts with the Japanese so that he can played the Pro-Japanese card when he was on the Volksraad political stage.

Because of his strong political activities and his closeness to the Japanese, the Dutch East Indies government considered Thamrin more dangerous than Soekarno, who was exiled in Ende since 1933.