Edo period warhead set

The collection contains eleven battle spearheads: the largest is 33 cm, the shortest 7 cm long. Ten of them date from the Edo period, i.e. the late 18th and early 19th centuries. One of them was forged contemporaneously, while it is interesting for its unusual shape and heart-shaped cutout. The shape is also often interpreted as the eyes of a boar (a boar in Japanese culture symbolizes courage, determination and strength).
The remaining arrowheads date from the late 18th and early 19th centuries. Four of them mimic a yari spear in form, and one (the longest of all), is, interestingly enough, an actual sanded yari spear. In addition, the set includes two short, compact spearheads used to pierce armor. There are also three different sized crimson-type yanone, with a very distinctive V-shape. The spearheads of this type were used to cut through ropes or nets, and in a combat context were used to inflict wide wounds. The spearheads are housed in a wooden box specially designed for their storage and display.
The set has a certificate of authenticity issued by Polish expert Krzysztof Polak.

Dimensions of the box with the arrowheads (closed): height 10 cm, width 37 cm, length 11 cm.
Length of the smallest spearhead: 7 cm
Length of the largest spearhead: 33 cm
Authors: unknown
Dating: 17th/19th century.