The prohibition of ‘Riba’ (Usury) and interest in Islamic law
Seminar
The Prohibition of ‘Riba’ (Usury) and Interest in Islamic Law

Date & time

19 August 2026 1:00pm - 2:00pm

Venue

Phillipa Weeks Library, Level 4, Building 7, ANU Law School

Register for the event

Event description

It is well known that Islamic banking and finance are required to operate without the charging or paying of interest. Various enforcement mechanisms have been devised to achieve this outcome, and the prohibition of riba (usury) in Islamic law is usually cited as the basis for this prohibition on interest.

However, when one refers to the traditional discussions in Islamic jurisprudence that serve as the basis for Islamic legal principles, the prohibition of interest (typically interest on loaned monies) is actually explained on grounds that are quite distinct from the prohibition of riba. In other words, there is an underlying premise that riba is not the same as interest.

What, then, is riba? And what is the relationship between riba and interest? Answering these questions is by no means straightforward, given the highly complex nature of riba as a concept. This seminar will offer insights into what the prohibition of riba actually addresses, and why riba has come to be equated with interest, drawing on discussions within traditional Islamic jurisprudence.

Note: Registration is not required for this event.

Speakers

Professor Yoshiaki Morozumi

Professor Yoshiaki Morozumi

Professor Yoshiaki Morozumi is appointed at the University of Tokyo Faculty of Law and Graduate Schools for Law and Politics. He graduated from the same faculty in 1990. Since then, his teaching and research has focused on Islamic Law, with a particular interest in the features of Middle Eastern Law, especially Egyptian Law and on the reception of law. His book, "Credit and Prohibition of Riba in Islamic Law" was published in Japanese in 2011.

Professor Morozumi is currently on sabbatical and has recently returned from an extended visit to Egypt. His current grant research project is a comparative study of codification from the perspective of mixed legal systems, with Egypt, India and Montenegro as case studies.