DenShinSanKa NFT is built on the ASTAR zkEVM chain.

Most marketplaces only support a select few blockchains. Currently the marketplaces that support the ASTAR zkEVM chain include Rarible and Sonova.

Buy an NFT on Sonova marketplace:

https://sonova.one/astar-zkevm/collections

Buy an NFT on Rarible:

https://help.rarible.com/hc/en-us/articles/10459890828429-How-do-I-purchase-an-NFT