Mr. Yoshio Matsudaira (MY) designs high-performance cartridges, and has designed for Koetsu (Onyx), Air Tight, Miyabi, etc.
Miyabi cartridges designed by Haruo Takeda, his latest design for 47 Labs was distributed by Yoshi Segoshi (Sakura Systems).
I don’t think that Yoshio Matsudaira did anything for Miyabi. Am I missed something?
Haruo Takeda (Miyabi), the former Audio-Technica employee who went on to design and build phono cartridges for Krell, Mark Levinson, and Cello, and who even lent his talents to Koetsu in that company’s early days.