In development "We are looking to build and improve our systems to ... identify ... mitigate the risk of slavery... train relevant employees". Page 1. Note: statement hasn't changed from 2017 to 2018- are they actually improving these systems? Use of words "looking to" is ambiguous.
Suppliers respect labour rights tier 1 "Where appropriate, (i) we expect our direct suppliers to have suitable anti-slavery and human trafficking policies; and (ii) we will communicate our expectation that those suppliers must prohibit modern slavery... they should work with their suppliers at each stage up in their supply chains". Page 1. Attempt made at ensuring tier 1 suppliers respect labour rights however not actually prohibited by Nomura. Very tenuous link to 2nd tier suppliers and nothing being enforced.
Contracts include clauses "we endeavour to include a clause relating to modern slavery and human trafficking in our terms with third parties". endeavour doesn't mean it's always done.