The MUFG Capsule is a sponsored item that bears the name of Mitsubishi UFJ Financial Group, Inc. It has identical properties to a standard Capsule, but like its investment-bank patron, it can pay interest in the form of duplicated items. If the MUFG Capsule is within the inventory of a verified agent, the Capsule contains fewer than 100 items, and the agent's inventory contains fewer than 2000 items, the MUFG will occasionally copy an item stored within and place the copy into itself. The Capsule will not produce an item unless all of these conditions are met.
While the exact algorithm is still being deduced, preliminary research suggests that every 24 hours, each item contained within each valid MUFG Capsule in an agent's inventory has about a 0.5% chance to be duplicated, with the copying occurring simultaneously for every Capsule.
The rarity and type of the items appears to be irrelevant, and duplications have been reported for every type of item. Capsules which contain more items seem to produce items slightly more often, although duplications have been reported down to a single item in a Capsule. It appears that the owner's gameplay behavior has no effect on duplication.
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Although the MUFG Capsule is listed as Very Rare, preliminary community studies suggest that it has the same drop rate as a standard Capsule, approximately 1 in 4,000 item rolls. Because Capsules and MUFG Capsules cannot be placed within other Capsules, they cannot be duplicated.