Berets are big in Japan and have been for many decades. Apart from a good presence of imported French and Spanish berets, most berets are made in Japan. Japan may have the largest number of quality beret manufacturers within its borders and these berets are made to a very high standard. 
Most famous are the DEER Basques, made by Kongo-Shokai until the company’s closure in 2016. It was hard to find a compatible brand, but now South Pacific Berets has found two that very much live up to the “DEER Standard”: the large range of Flamingo Berets from Kumamoto and the Shigematsu Berets in 9.5p (26.5cm).