It is a campaign for Japanese cryptographic currency exchanges.
Use This iPhone App https://itunes.apple.com/jp/app/takara/id1009304559 .
And , Go to places shown on the map.
Then , Get Counterparty Token.
MAGATAMA is Counterparty token.
OSAKA Castle is very nice, thank you!
RE: I picked up MAGATAMA at Osaka Castle. 大阪城の勾玉拾ってきました。