2021, Dr Osamu Inoue (President of ISIR) published a new book, "Nature, Man and Flowers: Kado as philosophical ikebana".  Also available in Kindle edition. https://www.amazon.com/dp/B09LYVTKZY/ 

2020, Dr Shoso Shimbo (Vice President of ISIR), “Environmental art as public art,” UNESCO Observatory, Multi-Disciplinary Research in the Arts, 6, 1.9.