In 2020, Tadashi Haga founded COCO Gallery, an art gallery focused on developing art-related businesses. He operates a comprehensive clinic in Omotesando, shisha lounges in Nakameguro and Ebisu, and an eight-story gallery building in Kyoto. Towards the end of 2021, he ventured into the NFT business.

In 2022, he established PBADAO, an NFT studio and systems development company that houses an NFT gallery. The company hosts a diverse team, including artists, engineers, community managers, and marketers, and is engaged in a variety of NFT projects. Haga is also developing his business around "NFTag™", a simplified hardware wallet that his company is developing, and is working on infrastructure improvements to facilitate the spread of NFTs.