Johhan Auctions is an art auction house serving collectors and sellers through seasonal auctions in Taiwan. Its sales bring together works and objects from a range of periods and traditions, including Chinese paintings and calligraphy, ceramics, jade, antiques, wine, and modern and contemporary art. Featured lots shown on its website include works by artists such as Zheng Banqiao, Zhu Ming, and Xi Dejin, alongside historical pieces such as Qing-dynasty porcelain and Song- or Yuan-period ceramics.

The company provides online auction information, including featured and complete lot listings, electronic catalogues, estimates, and details about previews and sale schedules. Prospective buyers can find guidance on registration, bidding procedures, and auction rules. For owners considering a sale, Johhan Auctions offers consignment information, an object-submission form, and an application process for valuation, with an explanation of how estimates are handled. The website also shares auction news, videos, and artist information. Its events include sales and previews at venues such as Taipei’s Songshan Cultural and Creative Park, connecting audiences with works across Taiwan’s art and collecting landscape.