Ryusaku holds a PhD in politics from the University of Sheffield.
His fields of expertise include democratic theory, mass society theory, citizenship studies and feminist political theory.
Ryusaku is currently undertaking a study of Karl Mannheim’s political and social thought in England in the 1930s and 1940s.
He contributed a book chapter, ‘Mannheim, mass society and democratic theory’, to The Anthem Companion to Karl Mannheim, edited by D. Kettler and V. Meja (Anthem Press, 2018).
