Ippon seoi-nage is a one-armed shoulder throw.
Judo is made up of throwing (nage), grappling (katame or 'newaza') and striking (atemi) techniques. The grappling techniques (newaza) are split into pinning (osaekomi), choking (shime) and joint locks (kansetsu).
The throwing techniques are split into standing techniques (tachi-waza) and sacrifice [falling] techniques (sutemi-waza). In turn, the standing techniques are split into hand techniques (te-waza), hip techniques (koshi-waza) and foot techniques (ashi-waza).
