Grew up with the Japanese swords

Yasha’s father had trained in Shotokan karate in Japan, and he was the first Japanese to teach karate in Scandinavia territory.  He also taught Iai. 

At that time, many Japanese swords were available in Europe.  His father also appraised and resold them. His father might be influenced by Yasha's grandfather since he was a sword collector. His father sent back some Japanese swords  to Japan to be re-sharpened and repaired. During his childhood Yasha grew up surrounded by these old Japanese swords......