Check Genuine - Sanwa Joystick and Buttons Purchase Invoice
Disclaimer: products are made in Japan, then imported to Hong Kong,(check import document).when we export again, we need to add a sticker "made in China" due to USA Custom & Boarder Protection (CBP: https://www.cbp.gov/) regulation. please don't get it wrong. the product is authentic from Sanwa Made in Japan.
we also have a verified dealer "Wish Techinolgoy" getting these from us.
Below shows the purchase invoice we purchased for Sanwa product.
(Ps.遊龍電子株式会社 Yatta Lunta Denshi Kaisha is Sanwa's verified Agent in Hong Kong)
you can check Sanwa Company's Agent here. ( but for Hong Kong Agent, it's in Sanwa's Chinese character page, you can use translation to check)
Below are proof of verified purchase.