Business

Since our founding, we have cultivated our “Manufacturing DNA”.
Tone’s Capability of “Knowledge and Creation/知創” leveraging our understanding of “Strata/地層” in our products.
We continue to create new value
through innovative thinking.

Our cultivated technical capability and experience create new value through underground development.
Aiming for a society friendly to people and the environment, we provide technologies that generate safety and peace of mind.