The Simple NDA (秘密保持契約) is a ready-to-use legal & compliance template you can send for signature in minutes. It is written for 1 signer (recipient) and, by default, expires 30 days after it is sent if left unsigned. It covers agreement, disclosure, confidentiality. Like every Abundera Sign template it is a convenience draft structured for ESIGN Act and UETA compliance, not a substitute for legal advice. Each signed copy is sealed with PAdES-LTA digital signatures, dual RFC 3161 timestamps, and a tamper-evident evidence package in WORM storage.