Yup, it is significant to some Maotsujun fans like me ^__^ Well we think similar (not the same) accessories like the bracelet and one of the necklace Matsujun wore are hints that they are together ^^ So here's the 2 necklace and bracelet that Matsujun wore during the concert but I don't know the date.

http://i28.servimg.com/u/f28/15/18/77/81/matsuj10.jpg

Thanks again for your report. ^____^