[1] Inu joined Bangladesh Chhatra League in 1968,[1] and was appointed the general secretary of its Engineering University unit in 1969.

[3] In 1974, Hasanul Haq Inu led a group of armed men to attack the residence of the then Home Minister Mansur Ali, which resulted in the 1974 Ramna massacre.

He is the president of a faction of the Jatiyo Samajtantrik Dal, which is a member of the Awami League led coalition government in Bangladesh.

[10] As an only Bangladesh Government high ranking minister Hasanul Haq publicly protested Bharatiya Janata Party president Amit Shah's remarks, describing Bangladeshis as ‘termites’.

In a strong word, Inu said in a public rally: “Amit Shah has made an unwanted remark by describing Bangladeshis as termites.

[18] After the resignation of Sheikh Hasina, Inu along with Rashed Khan Menon was charged with a case of murder during the quota-reform movement and was subsequently arrested.