Security Days Fall 2026

Overview

One of Japan's largest cybersecurity exhibition-and-seminar events, organized by NANO OPT Media. Held twice a year, the autumn edition tours five cities including Sapporo, Osaka, Fukuoka, Tokyo, and Nagoya. It delivers, free of charge, the latest incident trends and defenses against ransomware and targeted attacks for practitioners. The Tokyo venue alone draws cumulative session attendance of around 16,000.

Foundation

Founded

2013

Founder

NANO OPT Media, Inc.

Launched in 2013 by NANO OPT Media, also known for Interop Tokyo, as a security-focused event. It has expanded year over year into a nationwide touring format including regional cities. With free, registration-based seminars, it has become a staple where IT and security staff learn the latest threats and defenses.

Transition

1. 2013 First Security Days held
2. 2020 Expanded into a nationwide touring format
3. 2025 The autumn edition drew over 16,000 cumulative attendees at the Tokyo venue
4. 2026 Autumn edition held across five cities: Sapporo, Osaka, Fukuoka, Tokyo, and Nagoya