Personally, I think the Professor attaches too much importance to international institutions and law, mixing up how the world should be and how it is. Other views, such as Power Transition theory, rather got the straw man treatment. Also, the historical overviews were rather sweeping, imho.
It was enjoyable for me to do the course with so many Japanese students in the cohort - I think the real world and online course were well blended - so it really did feel like studying in Tokyo.
The University of Tokyo offers this course in English. In just four weeks (yes, it is a short course) the students have the opportunity of learning about important concepts of international relations like "just war", "balance of power", the cases in which wars are necessary and the conditions for peace, among others. Professor Kiichi Fujiwara, a very talented and calm scholar, talks about war and peace in a way I had never heard before, never forgeting to show various cases of historical and current conflicts around the world. An excellent course, which I higly recommend.