Category
Security Conferences and Events in Japan
Security events in Japan range from academic symposiums where researchers present papers, to practitioner conferences for engineers, to regional symposiums organized by industry groups and committees with local government and public agency support.
Because each targets a different audience (researchers, engineers, or corporate security staff), the depth of the talks is the quickest way to choose. Many have run for years and return around the same time each year.
At a glance
- Upcoming and ongoing
- 13
- Main locations
- Tokyo (8), 5 other regionsEvents held in several cities are counted once per location
- Main audiences
- Engineers (11), Companies (10), Researchers (9)
- Busiest months
- November 2026 (5), October 2026 (3), December 2026 (2)
- Series running 10+ years
- 8 (of 12 with a known founding year)
Upcoming
Computer Security Symposium 2026 (CSS2026)
The central academic symposium for security research in Japan, run by IPSJ's Computer Security research group since 1998. It convenes co-located workshops on malware countermeasures (MWS), privacy (PWS) and usable security (UWS) across five days, spanning formal theory through psychological and social dimensions. The host city rotates annually, with Hamamatsu hosting in 2026.
Security Days Fall 2026
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.
16th International Cybersecurity Symposium
A four-day international symposium co-hosted by Keio University KGRI with INCS-CoE, MITRE and the Sasakawa Peace Foundation, spanning national, economic and societal security. Its distinguishing feature is a speaker roster of Japanese cabinet-level officials alongside ambassador-level representatives and UN officials, debating multilateral public-private cooperation around AI and quantum technology. Free and held in person, it is a rare venue for government-level sessions at this scale.
CODE BLUE 2026
An international security conference born in Japan that gathers world-class security researchers in Tokyo. Talks on cutting-edge vulnerability research and attack techniques are fully interpreted, drawing 1,000+ attendees from Japan and abroad. Alongside the main conference, trainings, contests, and villages make it a hub for exchange across borders and languages.
Internet Week 2026
A comprehensive event on Internet infrastructure technology hosted by JPNIC. Running since 1997, it gathers the engineers who keep routing, DNS, and security infrastructure working, across disciplines. Programs range from tutorials to trend seminars; the 2025 edition drew a cumulative 3,900+ participants. The 2026 edition runs November 19-27, split into an Online Week and a Conference Week (November 25-27 in Ryogoku, Tokyo).
AVTOKYO2026
A community security conference running since 2008 under the motto "no drink, no hack." Held in a Shibuya nightclub, it is known for its unique style where hackers from Japan and abroad mingle over drinks. Talks center on edgy topics from cloud attack techniques to OSINT and physical security, and the event has carved out its own place broadcasting Japan's hacker culture to the world. The 2026 edition runs for a half day on November 21.
Tohoku Cybersecurity Symposium 2026
A cybersecurity symposium launching in 2026 in Tohoku, built on industry-government-academia cooperation. Organized by the Tohoku Cybersecurity Symposium Executive Committee and IPA, co-hosted by METI. Over two days it pairs management-track talks for executives with engineering-track talks for practitioners, adding a night session and a co-located tabletop exercise.
Business Technology Conference Japan 2026
A conference born out of a Slack community for corporate IT staff. Now in its fourth edition, the 2026 event rallies under the banner "IT ops is fun!" and devotes two days to practitioners solving frontline problems across data, AI, SaaS and security. Online attendance is free and on-site tickets start at ¥1,500, reflecting its aim of recasting corporate IT as a driver of organizational change.
Security Camp 2026 Mini (Hiroshima) Specialist Course
A selective, students-only course for those aged 25 and under, held by the Security Camp Council and HiBiS at Hiroshima City University's satellite campus. Capped at 20 participants, it packs one day with professional ethics from the Hiroshima Prefectural Police cybercrime division, a lecture on building a TCP/IP protocol stack from scratch, and a log investigation exercise from NRI Secure. By design it gives priority to applicants from the Chugoku region as a stepping stone to the national camp.
Kumamoto Cybersecurity Symposium 2026
The fifth edition of this symposium, held at Kumamoto-jo Hall by the Kumamoto Information Service Industry Association with Google's cooperation. It casts a deliberately wide net, from executives to law enforcement, lawyers and the general public, explicitly including operators of economically critical infrastructure. Speakers from Nikkei, IPA and Ritsumeikan University appear while admission stays free, making it a regional Kyushu venue that treats policy and practice together.
JSAC2027
A conference for security analysts hosted by JPCERT/CC, where frontline malware analysts, forensic investigators, and incident responders from Japan and abroad share hands-on findings. Launched in 2018, it marks its 10th anniversary in 2027. The event stays strictly in-person with no online streaming, and it is free to attend but capacity-limited, so early registration matters.
Cyber Security Symposium in Dogo 2027
A regionally rooted security symposium held each February in Matsuyama, Ehime during Japan's Cybersecurity Month. One of the country's hot-spring symposiums alongside Shirahama, Yuzawa, and Atami, it brings public and private practitioners together for two days of talks and discussion. The Shikoku Bureau of Telecommunications co-hosts, and developing regional security talent is a stated aim.
SECCON 15 Dennou Kaigi
Japan's largest security contest series, run by JNSA since 2012. The Dennou Kaigi conference opens the CTF finals, fought by domestic and international teams that survived the online qualifiers, to the public alongside talks, workshops, and CTF for GIRLS. The 15th edition takes place in Asakusabashi, Tokyo on February 20-21, 2027 with free admission, serving as a key venue for discovering hands-on security talent among companies and students alike.
Series without a listed next edition
Most recent edition shown, newest first. Next dates are added once officially announced.