Le-Techs Digital Contract is an electronic contract and document storage service from Le-Techs Inc. It is built around the patented ONEDigi (One-Time Digital Signature) technology, which creates a visible electronic signature that anyone can check through a QR code without special tools.

The ONEDigi signature has been officially confirmed by Japanese government authorities as meeting the requirements of the Electronic Signature Act. This makes it suitable for contracts with national and local government bodies. Identity checks use bank-level verification, adding an extra layer of trust for corporate signing.

Contracts include certified timestamps, full activity logs, and compliance with Japan’s Electronic Books Preservation Act, giving completed documents strong legal standing.

An entry plan is available at no cost for receiving and signing contracts. Paid plans use flat-rate annual pricing with no per-document fees, making costs easy to predict for companies with high contract volumes. A long-term archival option serves the construction industry with building model and design file support.