1st knife of the year. The wavey line is called a hamon. Same kind of thing you see on good samurai swords.

seen from Germany
seen from Singapore
seen from Japan

seen from Poland

seen from United States

seen from India
seen from United States
seen from Türkiye

seen from Australia
seen from United States

seen from Czechia
seen from United States
seen from South Africa
seen from United States
seen from Malaysia
seen from Canada

seen from Poland

seen from United States
seen from United States
seen from United States
1st knife of the year. The wavey line is called a hamon. Same kind of thing you see on good samurai swords.