So I have seen many Japanese male players wearing this mystery shoe: https://www.youtube.com/watch?v=KybRCBsSq2U 2:55 There is a whole line of them!! Are they on sale to the public??
Are you sure, I think you might be right about the shoes that Sho Sazaki is wearing towards the end, but I cannot see the lateral claws on any other shoe.
Yes, I said that I agree that the shoe that Sho Sazaki is wearing, (the man in the picture), probably is the Yonex SHB-102 in yellow, however the other player did not have such visible lateral claws.
I recommend this Phoenix airforce-1 badminton shoe. Comfort and has excellent foot support and it is only bellow us$30/ pair
This question has already passed: before it was Lin Dan's mystery Yonex shoes (the initial ones, not SHB70). Iirc it was one of the SC models in custom yellow colour (SC6i probably it was), so indeed not available in retail.