Lemonade Lab, a Boston, Mass.-based developer of sports devices and services, raised $5.8m in funding.
The round was led by FIH Mobile with participation from existing investors.
The company had earlier secured $4.5m in funding through 2014.
Founded by Kunihiko Kaji and Taizo Son, Lemonade Lab develops sports devices for athletes that use smart sensors, advanced analytics and a cloud-based service to provide data-driven coaching feedback based on latest sports science.
With its sensor technology, an athlete can monitor performance, movement and form on a display worn on the wrist or attached to a handle bar on a bicycle.
The device also incorporates advanced analytics to summarize the data and provide coaching feedback while training.
The company has a satellite office in Tokyo, Japan, where it conducts research and development work while Foxconn will manage manufacturing.
It plans on releasing the products in US, Japan, France and Taiwan later this year.