Uchi Mata Makikomi is one of the techniques adopted later
by the Kodokan into their
Shinmeisho No Waza (newly accepted techniques) list.
It is categorized as a side sacrifice technique,
Yoko-sutemi

Judo technique

This page is a list of judo techniques. There are a variety of techniques recognized by Kodokan judo and other budō . Below is a partial list, organized by technique type and alphabetically within type....

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Technique Description

This technique involves drawing your opponent forward with your non-dominant hand, while putting your dominant hand completely past their opposite shoulder, turn, and bend forward while blocking with your dominant leg. Carry opponent over as you sacrifice on top on them.