Companies are utilizing vein authentication to allow consumers to make payments without physical contact.
Hitachi in October launched a dedicated device that reads the pattern of veins in people's fingers.
The data is linked with the user's credit card information via a cloud computing service, allowing them to shop without carrying a wallet or smartphone.
Veins are believed to be harder to fake than fingerprints, as they are inside the body.
Hitachi wants hotels to use the technology to check in guests.
Tokyo-based startup Normee developed a system that identifies a person from the lines and shape of veins in their palm using a photo taken with a tablet or smartphone, and is aiming to use it for settling payments.
Honda Aya, who heads the company's R&D group, says the system has many applications because it does not require any special equipment.
The spread of the coronavirus is lifting demand for contactless products and services.