Mark Cahill has become the first person in the UK to have a hand transplant.
The 51-year-old has spoken about his 20 year struggle with gout which led to the lost of his right hand, and the shock of finding out there was a possible donor on Boxing Day.
He also described how his new hand feels and how much he is looking forward to going back to work and being "able to hold my grandson's hand".
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The group paid tribute in the Mamayev Kurgan memorial park.
A nine-year-old schoolgirl was among the victims around the city of Osaka.
Supporters are still arriving in the city.