LRI readers are already familiar with honkaku mysteries through the 6 novels and collections published so far.
Caroline Crampton, the author of the Shedunnit podcasts, published the well-researched and highly informative article, the best I have seen to date, attached below. It appeared in the UK’s The Guardian on April 27, 2021. (I have had to transcribe it, for technical reasons.)
Honkaku Article
Caroline was not to know that LRI published ‘The Decagon House Murders’ before Pushkin Press (who outbid us on the renewal)