There are two key inscriptions here. (Gokashi-kin Haiju Kinen) - This translates to Commemoration of Receiving an Imperial Monetary Grant.
Basically, this means the recipient was awarded a monetary gift from the Emperor or high command - something reserved for highly valued personnel. = Imperial Gift, meaning this was bestowed by the Emperor or through Imperial channels. = Pure Pewter, indicating high-quality metal used in its production. = Most likely the name of the maker or location where these cups were produced, possibly tied to a military-related workshop. Put all this together, and you have a highly prestigious commemorative set, likely given to someone of importance within the Guards Division.
These guys were the elite troops, tasked with protecting the Emperor himself while also participating in major battles. Finding one of these cups is already difficult, but a full set of five? That's a serious collector's find. If you're into Imperial Japanese militaria, you already know how rare items directly linked to Imperial rewards are.
This set belongs in a historical collection, museum, or display case. Don't let this one slip through your fingers - once it's gone, good luck finding another! International Buyers - Please Note. Thank you for your understanding.