Here's a a video of Junichi Ide, Yosimitu Kajiya making a Kyushu style, freeforged knife (it looks like he forge welds a leather knife , hammers a Santoku and grinds a Bunka) the auto translations are not great.
Available
Aus/NZ
There is a NZ knife shop that has been stocking Ide-san's knives for longer than all of these shops and stocks the largest range of his knives, but I am unable to say which one.....
https://www.saitoknives.com.au/whats-new/introducing-yosimitu-kajiya/
EU
https://www.japaneseknives.eu/c-7132050/yosimitu-kajiya-junichi-ide/
https://thechefscorner.de/products/yosimitu-kajiya-shirogami-2-gyuto-180mm
Japan
https://yosimitu-kajiya.stores.jp/
https://knifejapan.com/shop-by-brand/yoshimitsu-kajiya-nagasaki/
https://www.houcyou.tw/categories/yosimitu
Canada
https://kakushin.ca/products/matsu-custom-shiro-gyuto-210mm
Available
Aus/NZ
There is a NZ knife shop that has been stocking Ide-san's knives for longer than all of these shops and stocks the largest range of his knives, but I am unable to say which one.....
https://www.saitoknives.com.au/whats-new/introducing-yosimitu-kajiya/
EU
https://www.japaneseknives.eu/c-7132050/yosimitu-kajiya-junichi-ide/
https://thechefscorner.de/products/yosimitu-kajiya-shirogami-2-gyuto-180mm
Japan
https://yosimitu-kajiya.stores.jp/
https://knifejapan.com/shop-by-brand/yoshimitsu-kajiya-nagasaki/
https://www.houcyou.tw/categories/yosimitu
Canada
https://kakushin.ca/products/matsu-custom-shiro-gyuto-210mm