Nitu (48kg), Jyoti Gulia (51kg), Sakshi choudhury (54kg), Shashi Chopra (57kg) and Ankushita Boro (64kg) won gold medals for an Indian sweep in the finals, which were halted for 45 minutes by a minor fire mishap in the spectator stands.
Of these, Jyoti also qualified for next year's Youth Olympic Games in Argentina courtesy her top finish and the fact that she was born after 1999.
Adding to the tally were two bronze medals secured by Neha Yadav (+81kg) and Anupama (81kg), making it India's best ever performance at the marquee age group event.
"You are seeing the probable Olympic medallists for India at the Tokyo Olympics here. It has been a fantastic performance and Guwahati has been a fabulous host," Boxing Federation of India President Ajay Singh told PTI.
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He announced a cash prize of Rs two lakh each for all the gold-medallists.
Up against Kazakhstan's Zhazira Urakbayeva, Nitu was the first to walk into the ring for India today and she had it rather easy against the Kazakh, whose footwork was all over the place and she struggled to keep her balance.
Nitu took her time to get a measure of her rival but once she was done with it, the Indian had no trouble connecting her straight punches.
Jyoti's bout against Russia's Ekaterina Molchanova was fought on an even keel. In a exciting contest, both the boxers matched each other punch for punch and had the packed stadium on its feet with their exchanges.
The taller Russian seemed hardly perturbed by the vociferous support that her opponent was getting but the Indian was a shade better in connecting her blows.
Similar was contest between Sakshi and England's Ivy-Jane Smith.
Smith seemed more dominant but could not find favour with the judges, who were 3-2 in awarding the bout the home favourite.
Shashi, however, did not face much of a contest from Vietnam's Ngoc Do Hong even though the judges ruled it 3-2 in her favour.
The lanky Indian, recommended into the camp by boxing's national observer and former Commonwealth Games gold-medallist Akhil Kumar, put her height and reach advantage to good use and was decidedly the more aggressive of the two in all the three rounds.
The last bout of the day was Ankushita taking on Russia's Ekaterina Dynnk and egged on by a vociferous crowd, the local girl, whp had been laid low by chicken pox before the tournament, pulled through for a 3-2 victory.
The championship was held in India for the first time.