In the anime Samurai Champloo, there is a character called Jin who is defined in the Samurai Champloo Wiki as:
(..) a spectacled man with messy black hair tied in a loose ponytail with two strands that frame his face. His attire consists of a simple blue kimono adorned with multiple symbols that are four squares in a diamond formation on the right pec, sleeves, and back of his kimono. Also wears a brown beaded bracelet on his right wrist.
These symbols are called mon, and his looks like this
Wikipedia's page on the character says that this mon resembles that of the Takeda clan, and provides a link to the story of Takeda Shingen, as well as a broken link.
Is this really the Takeda mon? (has the author every stated this, or is there any official reference)
Or is it all just speculation and the pointing out of similarities? (which may just have been inspirations)
Or could it be some other less-known clan's mon?