The Japanese Chogin was a coin that Circulated during the Shogunate. The Chogin was used primarily for commerce but had no specific value. the value of the coin was based on the silver content. This Chogin from the Tempo Era (Krause C#9b) measures 86 mm x 31 mm and weighs141.3 gms. the silver content is .261 making a total of 36.88 gms of silver. The Tempo Bu, the standard measure of currency at the time has approximately 8.64 gms. of silver making this bar worth 4.27 Bu. Richard
Nice! The one below is bigger than the one you have, selling for top dollar! Cool looking silver, you have there! So how many exists today approximately, do you happen to know? https://www.ebay.com/itm/AR-Chogin-...659687?hash=item2ae500c667:g:vfIAAOSwOFdc4wlR
I believe they are fairly rare. I don't know how many may still exist. I do think the one you posted from ebay is overpriced.
Probably not? A Caliph is usually a religious figure. Though the Emperor has a religious component to his duties as center of the Shinto religion and purported descendant of the Sun Goddess, Amaterasu, the Shogun was a secular position. Nominally the Shoguns served under the emperor as a sort of chief warlord but in actuality they held all the power.