About Us

Our Strengths

Abundant Inventory

A lot of Certified Vehicles

Operated by PROTO CORPORATION;
a Pioneer in Automotive
Information Services

PROTO CORPORATION is a company that manages Japan's largest used car information site “Goonet”.
Since we are cooperating with second-hand car dealers all over Japan, we can offer the perfect car for you from our abundant inventory.
In addition, the PROTO Group is developing a service called “Goo KANTEI”, in which an appraiser of the Japan Automotive Appraisal Association (JAAA), a third-party organization, appraises used cars.

GOONET EXCHANGE CO., LTD. is a subsidiary company of PROTO Corporation which operates automobile information service called “Goo” in Japan.
As PROTO Group, which consists of more than 10 companies in provide a variety of automobile related services, many of which are leading shares in their specialized fields.
Our aim is to be helpful to people by delivering used cars of superior quality to the world as well as by providing useful automobile related information which PROTO Group has cultivated over the years.