I asked my optician check two Owndays glasses. She confirmed they were correctly filled, though around axis +/-6 on which is within most tolerances for people. I think the smallest difference was about 3 degrees off. I do notice a bit of strain or "off-ness" which she says could also be my eyes used to my usual lens material Trivex (rimless drill mount frame preference for my daily wear) in addition to the axis (picky eyes). "Besides being called Trivex, the lens material is marketed under several alternative brand names by lens manufacturers, including NXT (Essilor), Phoenix (Hoya) and Trilogy (Younger Optics)." (link)

Did a bit of searching and Hoya has a branded optical shop "Hoya Vision Care Studio" in Aoyama https://hoya-vcs.jp/ and also hit on Oh My Glasses which carries Seiko, Hoya, and Tokai lenses with a price list https://www.ohmyglasses.jp/lens & lens replacement https://www.ohmyglasses.jp/guide/order/lens. Looks like their store brand frames are manufactured in Fukui https://www.ohmyglasses.jp/brands/oh-my-glasses-tokyo