Complex sentence: The "Tanto" is commonly referred to as a knife or dagger, the blade is single or double edged with a length between 15 and 30 cm (6-12 inches, in Japanese 1 shaku).
Split into simpler sentences: The "Tanto" is commonly referred to as a knife or dagger. The blade is single or double edged with a length between 15 and 30 cm (6-12 inches, in Japanese 1 shaku).