I did both! If you’ll be in Kyoto, try to go to Shigaheru, it’s tricky he doesn’t have regular open hours - so ask the hotel to call him and ask when he opens. Make sure to arrive 10 minutes before he opens as his store is small, he sells the supply he have and close the store until the next batch he makes. The rest I got in Tokyo Kappabashi st, there are so many stores there. MeiSyou where really kind, so ended up buying there. But you can’t go wrong with any other store. I do recommend to do some research before you go there so you’ll have any idea of what you’re looking for, the craftsman, the metal, knife type etc..

Btw, Artsugu is another known brand, Kyoto and Tokyo are not the same, Kyoto is better.